{"id":443,"date":"2024-10-24T09:43:47","date_gmt":"2024-10-24T00:43:47","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=443"},"modified":"2025-03-24T08:53:17","modified_gmt":"2025-03-23T23:53:17","slug":"%e3%80%90%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%e3%80%91java-xmx%e3%82%aa%e3%83%97%e3%82%b7%e3%83%a7%e3%83%b3%ef%bc%9a%e3%83%a1%e3%83%a2%e3%83%aa%e8%a8%ad%e5%ae%9a%e3%81%ae%e6%9c%80%e9%81%a9","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=443","title":{"rendered":"\u3010\u5b8c\u5168\u30ac\u30a4\u30c9\u3011Java -Xmx\u30aa\u30d7\u30b7\u30e7\u30f3\uff1a\u30e1\u30e2\u30ea\u8a2d\u5b9a\u306e\u6700\u9069\u5316\u3067\u6027\u80fd\u30922\u500d\u306b\uff01"},"content":{"rendered":"<div id=\"sgb-css-id-1\">\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">1. Java -Xmx\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u306f\u4f55\u304b\uff1f\u521d\u5fc3\u8005\u306b\u3082\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">JVM\u30d2\u30fc\u30d7\u30e1\u30e2\u30ea\u306e\u57fa\u672c\u6982\u5ff5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">-Xmx \u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u5f79\u5272\u3068\u91cd\u8981\u6027<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">2. -Xmx\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u6b63\u3057\u3044\u4f7f\u3044\u65b9\uff1a\u8a2d\u5b9a\u304b\u3089\u78ba\u8a8d\u307e\u3067<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u5f15\u6570\u3067\u306e\u6307\u5b9a\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-5\">IDE\u3067\u306e\u8a2d\u5b9a\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-6\">\u73fe\u5728\u306e\u8a2d\u5b9a\u5024\u306e\u78ba\u8a8d\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-10\">\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-11\">3. -Xmx\u306e\u6700\u9069\u306a\u5024\u306e\u6c7a\u3081\u65b9\uff1a5\u3064\u306e\u91cd\u8981\u306a\u8003\u616e\u70b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-12\">1. \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8981\u4ef6\u5206\u6790<\/a>      <\/li>      <li>        <a href=\"#i-13\">2. \u4f7f\u7528\u53ef\u80fd\u306a\u7269\u7406\u30e1\u30e2\u30ea\u3068\u306e\u95a2\u4fc2<\/a>      <\/li>      <li>        <a href=\"#i-14\">3. \u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u5f71\u97ff<\/a>      <\/li>      <li>        <a href=\"#i-15\">4. \u4ed6\u306eJVM\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u306e\u76f8\u4e92\u4f5c\u7528<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-16\">5. \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c6\u30b9\u30c8\u306e\u91cd\u8981\u6027<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-17\">4. -Xmx\u30aa\u30d7\u30b7\u30e7\u30f3\u8a2d\u5b9a\u306e\u5b9f\u8df5\u4f8b\uff1a3\u3064\u306e\u4ee3\u8868\u7684\u306a\u30b1\u30fc\u30b9\u30b9\u30bf\u30c7\u30a3<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-18\">4.1 Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b5\u30fc\u30d0\u30fc\u306e\u6700\u9069\u5316<\/a>      <\/li>      <li>        <a href=\"#i-22\">4.2 \u30d0\u30c3\u30c1\u51e6\u7406\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30e1\u30e2\u30ea\u8a2d\u5b9a<\/a>      <\/li>      <li>        <a href=\"#i-26\">4.3 \u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3067\u306e\u8003\u616e\u70b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-30\">\u307e\u3068\u3081\uff1a-Xmx\u6700\u9069\u5316\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-31\">5. -Xmx\u306b\u95a2\u9023\u3059\u308b\u554f\u984c\u306e\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-32\">5.1 OutOfMemoryError\u306e\u539f\u56e0\u3068\u5bfe\u7b56<\/a>      <\/li>      <li>        <a href=\"#i-33\">5.2 \u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306e\u691c\u51fa\u3068\u89e3\u6c7a\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-34\">5.3 \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u4f4e\u4e0b\u6642\u306e\u30c7\u30d0\u30c3\u30b0\u624b\u9806<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-35\">\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-36\">6. -Xmx\u3068\u95a2\u9023\u3059\u308bJVM\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u7dcf\u5408\u7684\u306a\u6d3b\u7528\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-37\">6.1 -Xms\u3068\u306e\u95a2\u4fc2\u6027\u3068\u63a8\u5968\u8a2d\u5b9a<\/a>      <\/li>      <li>        <a href=\"#i-38\">6.2 \u4ed6\u306e\u30e1\u30e2\u30ea\u95a2\u9023\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u306e\u7d44\u307f\u5408\u308f\u305b<\/a>      <\/li>      <li>        <a href=\"#i-39\">6.3 \u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u306e\u6700\u9069\u306a\u9023\u643a<\/a>      <\/li>      <li>        <a href=\"#i-40\">6.4 \u7dcf\u5408\u7684\u306a\u8a2d\u5b9a\u4f8b<\/a>      <\/li>      <li>        <a href=\"#i-41\">6.5 JVM\u30aa\u30d7\u30b7\u30e7\u30f3\u8a2d\u5b9a\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-42\">6.6 \u6ce8\u610f\u70b9\u3068\u3088\u304f\u3042\u308b\u843d\u3068\u3057\u7a74<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-43\">7. \u672a\u6765\u3092\u898b\u636e\u3048\u305f-Xmx\u8a2d\u5b9a\uff1aJava 9\u4ee5\u964d\u306e\u5909\u66f4\u70b9\u3068\u6700\u65b0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-44\">7.1 \u30e2\u30b8\u30e5\u30fc\u30eb\u30b7\u30b9\u30c6\u30e0\u304c\u30e1\u30e2\u30ea\u7ba1\u7406\u306b\u4e0e\u3048\u308b\u5f71\u97ff<\/a>      <\/li>      <li>        <a href=\"#i-45\">7.2 \u30b3\u30f3\u30c6\u30ca\u74b0\u5883\u3067\u306e-Xmx\u8a2d\u5b9a<\/a>      <\/li>      <li>        <a href=\"#i-46\">7.3 \u30af\u30e9\u30a6\u30c9\u30cd\u30a4\u30c6\u30a3\u30d6\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u304a\u3051\u308b\u52d5\u7684\u30e1\u30e2\u30ea\u7ba1\u7406\u306e\u5c55\u671b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-47\">\u307e\u3068\u3081\uff1a\u672a\u6765\u306e-Xmx\u8a2d\u5b9a\u306b\u95a2\u3059\u308b\u63a8\u5968\u4e8b\u9805<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">1. Java -Xmx\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u306f\u4f55\u304b\uff1f\u521d\u5fc3\u8005\u306b\u3082\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-2\">\n<p>Java\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u52b9\u7387\u7684\u306b\u52d5\u4f5c\u3055\u305b\u308b\u305f\u3081\u306b\u306f\u3001\u30e1\u30e2\u30ea\u7ba1\u7406\u304c\u6975\u3081\u3066\u91cd\u8981\u3067\u3059\u3002\u305d\u306e\u4e2d\u3067\u3001<code>-Xmx<\/code>\u30aa\u30d7\u30b7\u30e7\u30f3\u306f\u7279\u306b\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001JVM\u30d2\u30fc\u30d7\u30e1\u30e2\u30ea\u306e\u57fa\u672c\u6982\u5ff5\u304b\u3089<code>-Xmx<\/code>\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u5f79\u5272\u307e\u3067\u3001\u521d\u5fc3\u8005\u306b\u3082\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-3\">\n<h3 class=\"wp-block-heading\" id=\"i-1\">JVM\u30d2\u30fc\u30d7\u30e1\u30e2\u30ea\u306e\u57fa\u672c\u6982\u5ff5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-4\">\n<p>JVM\u30d2\u30fc\u30d7\u30e1\u30e2\u30ea\u3068\u306f\u3001Java\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u683c\u7d0d\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3059\u308b\u30e1\u30e2\u30ea\u9818\u57df\u3067\u3059\u3002\u3053\u308c\u3092\u8eab\u8fd1\u306a\u3082\u306e\u306b\u4f8b\u3048\u308b\u3068\u3001\u30d2\u30fc\u30d7\u30e1\u30e2\u30ea\u306f\u300c\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4f5c\u696d\u5834\u300d\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-5\">\n<p>\u30d2\u30fc\u30d7\u30e1\u30e2\u30ea\u306f\u4e3b\u306b2\u3064\u306e\u9818\u57df\u3067\u69cb\u6210\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-7\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u30d2\u30fc\u30d7\u30e1\u30e2\u30ea\u306e\u9818\u57df<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-6\">\n<li>Young Generation\uff08\u65b0\u3057\u3044\u4e16\u4ee3\uff09\uff1a\u77ed\u547d\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u683c\u7d0d<\/li>\n<\/div>\n\n\n<li>Old Generation\uff08\u53e4\u3044\u4e16\u4ee3\uff09\uff1a\u9577\u671f\u9593\u751f\u5b58\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u683c\u7d0d<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-8\">\n<p>\u3053\u308c\u3089\u306e\u9818\u57df\u306f\u3001\u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\uff08GC\uff09\u3068\u3044\u3046\u30d7\u30ed\u30bb\u30b9\u306b\u3088\u3063\u3066\u81ea\u52d5\u7684\u306b\u7ba1\u7406\u3055\u308c\u307e\u3059\u3002GC\u306f\u4e0d\u8981\u306b\u306a\u3063\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u524a\u9664\u3057\u3001\u30e1\u30e2\u30ea\u3092\u89e3\u653e\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-9\">\n<h3 class=\"wp-block-heading\" id=\"i-2\">-Xmx \u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u5f79\u5272\u3068\u91cd\u8981\u6027<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-10\">\n<p><code>-Xmx<\/code>\u30aa\u30d7\u30b7\u30e7\u30f3\u306f\u3001JVM\u304c\u4f7f\u7528\u53ef\u80fd\u306a\u6700\u5927\u30d2\u30fc\u30d7\u30e1\u30e2\u30ea\u30b5\u30a4\u30ba\u3092\u6307\u5b9a\u3059\u308b\u305f\u3081\u306e\u3082\u306e\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u300c\u4f5c\u696d\u5834\u306e\u6700\u5927\u30b5\u30a4\u30ba\u300d\u3092\u6c7a\u5b9a\u3059\u308b\u3068\u8003\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-11\">\n<p>\u4f7f\u7528\u4f8b\uff1a<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">java -Xmx2g MyApplication<\/pre>\n\n\n<div id=\"sgb-css-id-12\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u6700\u5927\u30d2\u30fc\u30d7\u30b5\u30a4\u30ba\u30922\u30ae\u30ac\u30d0\u30a4\u30c8\u306b\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-13\">\n<p><code>-Xmx<\/code>\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u91cd\u8981\u6027\u306f\u4ee5\u4e0b\u306e\u70b9\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\"><code>-Xmx<\/code> \u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u91cd\u8981\u6027<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-14\">\n<li>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5b89\u5b9a\u6027\u5411\u4e0a\uff1a\u9069\u5207\u306a\u30e1\u30e2\u30ea\u5bb9\u91cf\u3092\u78ba\u4fdd\u3059\u308b\u3053\u3068\u3067\u3001<code>OutOfMemoryError<\/code>\u3092\u9632\u3050\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-15\">\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316\uff1a\u5341\u5206\u306a\u30e1\u30e2\u30ea\u3092\u5272\u308a\u5f53\u3066\u308b\u3053\u3068\u3067\u3001\u983b\u7e41\u306a\u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u56de\u907f\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5fdc\u7b54\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u3002<\/li>\n<\/div>\n\n\n<li>\u30ea\u30bd\u30fc\u30b9\u4f7f\u7528\u306e\u52b9\u7387\u5316\uff1a\u5fc5\u8981\u4ee5\u4e0a\u306b\u30e1\u30e2\u30ea\u3092\u78ba\u4fdd\u305b\u305a\u3001\u30b7\u30b9\u30c6\u30e0\u30ea\u30bd\u30fc\u30b9\u3092\u52b9\u7387\u7684\u306b\u4f7f\u7528\u3059\u308b\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-16\">\n<p>\u305f\u3060\u3057\u3001<code>-Xmx<\/code>\u306e\u8a2d\u5b9a\u306b\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-18\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:#ffb36b;color:#FFF\" class=\"sgb-box-simple__title\"><code>-Xmx<\/code> \u306e\u8a2d\u5b9a\u306e\u6ce8\u610f\u70b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:#ffb36b;background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-17\">\n<li>\u5927\u304d\u3059\u304e\u308b\u5024\u3092\u8a2d\u5b9a\u3059\u308b\u3068\u3001\u4ed6\u306e\u30d7\u30ed\u30bb\u30b9\u306e\u30e1\u30e2\u30ea\u304c\u4e0d\u8db3\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/li>\n<\/div>\n\n\n<li>\u5c0f\u3055\u3059\u304e\u308b\u5024\u3067\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u4f4e\u4e0b\u3057\u305f\u308a\u3001\u30e1\u30e2\u30ea\u4e0d\u8db3\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u308a\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-19\">\n<p>\u9069\u5207\u306a<code>-Xmx<\/code>\u5024\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8981\u4ef6\u3001\u4f7f\u7528\u53ef\u80fd\u306a\u7269\u7406\u30e1\u30e2\u30ea\u3001\u540c\u6642\u306b\u5b9f\u884c\u3055\u308c\u308b\u4ed6\u306e\u30d7\u30ed\u30bb\u30b9\u306a\u3069\u3092\u8003\u616e\u3057\u3066\u6c7a\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-20\">\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001<code>-Xmx<\/code>\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u5177\u4f53\u7684\u306a\u4f7f\u3044\u65b9\u3068\u3001\u6700\u9069\u306a\u5024\u306e\u6c7a\u3081\u65b9\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-21\">\n<h2 class=\"wp-block-heading\" id=\"i-3\">2. -Xmx\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u6b63\u3057\u3044\u4f7f\u3044\u65b9\uff1a\u8a2d\u5b9a\u304b\u3089\u78ba\u8a8d\u307e\u3067<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-22\">\n<p>-Xmx\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u52b9\u679c\u7684\u306b\u4f7f\u7528\u3059\u308b\u306b\u306f\u3001\u6b63\u3057\u3044\u8a2d\u5b9a\u65b9\u6cd5\u3068\u78ba\u8a8d\u65b9\u6cd5\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u3067\u306e\u6307\u5b9a\u65b9\u6cd5\u3001\u4e3b\u8981\u306aIDE\uff08\u7d71\u5408\u958b\u767a\u74b0\u5883\uff09\u3067\u306e\u8a2d\u5b9a\u65b9\u6cd5\u3001\u305d\u3057\u3066\u73fe\u5728\u306e\u8a2d\u5b9a\u5024\u3092\u78ba\u8a8d\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-23\">\n<h3 class=\"wp-block-heading\" id=\"i-4\">\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u5f15\u6570\u3067\u306e\u6307\u5b9a\u65b9\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-24\">\n<p>\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u304b\u3089-Xmx\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u6307\u5b9a\u3059\u308b\u57fa\u672c\u69cb\u6587\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">java -Xmx&lt;size&gt; MainClass<\/pre>\n\n\n<div id=\"sgb-css-id-25\">\n<p>\u30b5\u30a4\u30ba\u306b\u306f\u6570\u5024\u3068\u5358\u4f4d\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u6307\u5b9a\u3057\u307e\u3059\u3002\u4e3b\u306a\u5358\u4f4d\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-29\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u5f15\u6570\u306e\u6307\u5b9a\u5358\u4f4d<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-26\">\n<li>\u30d0\u30a4\u30c8\uff1a\u30c7\u30d5\u30a9\u30eb\u30c8\uff08\u5358\u4f4d\u306a\u3057\uff09<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-27\">\n<li>\u30ad\u30ed\u30d0\u30a4\u30c8\uff1ak \u307e\u305f\u306f K<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-28\">\n<li>\u30e1\u30ac\u30d0\u30a4\u30c8\uff1am \u307e\u305f\u306f M<\/li>\n<\/div>\n\n\n<li>\u30ae\u30ac\u30d0\u30a4\u30c8\uff1ag \u307e\u305f\u306f G<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-30\">\n<p>\u4f8b\u3048\u3070\uff1a<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">java -Xmx512m MyApp  # \u6700\u5927\u30d2\u30fc\u30d7\u30b5\u30a4\u30ba\u3092512MB\u306b\u8a2d\u5b9a\njava -Xmx2g MyApp    # \u6700\u5927\u30d2\u30fc\u30d7\u30b5\u30a4\u30ba\u30922GB\u306b\u8a2d\u5b9a\njava -Xmx2048m MyApp # \u6700\u5927\u30d2\u30fc\u30d7\u30b5\u30a4\u30ba\u30922048MB\uff082GB\uff09\u306b\u8a2d\u5b9a<\/pre>\n\n\n<div id=\"sgb-css-id-33\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:#ffb36b;color:#FFF\" class=\"sgb-box-simple__title\">\u6ce8\u610f\u70b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:#ffb36b;background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-31\">\n<li>\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u306f\u533a\u5225\u3055\u308c\u307e\u305b\u3093\uff08-Xmx2g \u3068 -Xmx2G \u306f\u540c\u3058\uff09<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-32\">\n<li>\u6570\u5024\u3068\u5358\u4f4d\u306e\u9593\u306b\u30b9\u30da\u30fc\u30b9\u3092\u5165\u308c\u306a\u3044\u3067\u304f\u3060\u3055\u3044<\/li>\n<\/div>\n\n\n<li>JVM\u30aa\u30d7\u30b7\u30e7\u30f3\u306f\u901a\u5e38\u3001\u30af\u30e9\u30b9\u540d\u306e\u524d\u306b\u914d\u7f6e\u3057\u307e\u3059<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-34\">\n<h3 class=\"wp-block-heading\" id=\"i-5\">IDE\u3067\u306e\u8a2d\u5b9a\u65b9\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-37\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">Eclipse<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-35\">\n<li>\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u53f3\u30af\u30ea\u30c3\u30af\u3057\u3001\u300cProperties\u300d\u3092\u9078\u629e<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-36\">\n<li>\u300cRun\/Debug Settings\u300d\u304b\u3089\u8a72\u5f53\u306e\u69cb\u6210\u3092\u9078\u629e\u3057\u3001\u300cEdit\u300d\u3092\u30af\u30ea\u30c3\u30af<\/li>\n<\/div>\n\n\n<li>\u300cArguments\u300d\u30bf\u30d6\u3092\u958b\u304d\u3001\u300cVM arguments\u300d\u6b04\u306b <code>-Xmx&lt;size&gt;<\/code> \u3092\u8ffd\u52a0<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-40\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">IntelliJ IDEA<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-38\">\n<li>\u300cRun\u300d\u30e1\u30cb\u30e5\u30fc\u304b\u3089\u300cEdit Configurations\u300d\u3092\u9078\u629e<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-39\">\n<li>\u8a72\u5f53\u306e\u69cb\u6210\u3092\u9078\u629e<\/li>\n<\/div>\n\n\n<li>\u300cVM options\u300d\u30d5\u30a3\u30fc\u30eb\u30c9\u306b <code>-Xmx&lt;size&gt;<\/code> \u3092\u8ffd\u52a0<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-41\">\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u73fe\u5728\u306e\u8a2d\u5b9a\u5024\u306e\u78ba\u8a8d\u65b9\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-42\">\n<h4 class=\"wp-block-heading\" id=\"i-7\">Java\u30b3\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u305f\u78ba\u8a8d<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-43\">\n<p>Java\u30d7\u30ed\u30b0\u30e9\u30e0\u5185\u3067\u73fe\u5728\u306e\u6700\u5927\u30d2\u30fc\u30d7\u30b5\u30a4\u30ba\u3092\u78ba\u8a8d\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">long maxHeapSize = Runtime.getRuntime().maxMemory();\nSystem.out.println(\"\u6700\u5927\u30d2\u30fc\u30d7\u30b5\u30a4\u30ba: \" + (maxHeapSize \/ 1024 \/ 1024) + \"MB\");<\/pre>\n\n\n<div id=\"sgb-css-id-44\">\n<h4 class=\"wp-block-heading\" id=\"i-8\">\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u305f\u78ba\u8a8d<\/h4>\n<\/div>\n\n\n<ol class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-45\">\n<li><code>jstat<\/code>\u30b3\u30de\u30f3\u30c9\uff1a<\/li>\n<\/div><\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   jstat -gc &lt;pid&gt;<\/pre>\n\n\n\n<p>\u3053\u3053\u3067\u3001<code>&lt;pid&gt;<\/code>\u306f\u5bfe\u8c61\u306eJava\u30d7\u30ed\u30bb\u30b9ID\u3067\u3059\u3002<\/p>\n\n\n\n<ol start=\"2\" class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-46\">\n<li><code>jcmd<\/code>\u30b3\u30de\u30f3\u30c9\uff1a<\/li>\n<\/div><\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   jcmd &lt;pid&gt; VM.flags -all<\/pre>\n\n\n<div id=\"sgb-css-id-47\">\n<p>\u3053\u306e\u30b3\u30de\u30f3\u30c9\u306f\u5168\u3066\u306eJVM\u30d5\u30e9\u30b0\u3092\u8868\u793a\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-48\">\n<h4 class=\"wp-block-heading\" id=\"i-9\">\u76e3\u8996\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u305f\u78ba\u8a8d<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-50\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u76e3\u8996\u30c4\u30fc\u30eb<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-49\">\n<li>JConsole\uff1aJDK\u306b\u540c\u68b1\u3055\u308c\u3066\u3044\u308b\u30b0\u30e9\u30d5\u30a3\u30ab\u30eb\u306a\u76e3\u8996\u30c4\u30fc\u30eb<\/li>\n<\/div>\n\n\n<li>VisualVM\uff1a\u3088\u308a\u9ad8\u5ea6\u306a\u6a5f\u80fd\u3092\u6301\u3064\u76e3\u8996\u30fb\u30d7\u30ed\u30d5\u30a1\u30a4\u30ea\u30f3\u30b0\u30c4\u30fc\u30eb<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-51\">\n<p>\u3053\u308c\u3089\u306e\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u30d2\u30fc\u30d7\u30e1\u30e2\u30ea\u306e\u4f7f\u7528\u72b6\u6cc1\u3092\u8996\u899a\u7684\u306b\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-52\">\n<h3 class=\"wp-block-heading\" id=\"i-10\">\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-53\">\n<p>-Xmx\u306e\u8a2d\u5b9a\u304c\u53cd\u6620\u3055\u308c\u306a\u3044\u5834\u5408\u306f\u3001\u4ee5\u4e0b\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-56\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">-Xmx\u306e\u8a2d\u5b9a\u304c\u53cd\u6620\u3055\u308c\u306a\u3044\u5834\u5408\u306e\u78ba\u8a8d\u4e8b\u9805<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-54\">\n<li>JVM\u306e\u8d77\u52d5\u30b9\u30af\u30ea\u30d7\u30c8\u306b\u4ed6\u306e\u8a2d\u5b9a\u304c\u306a\u3044\u304b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-55\">\n<li>\u74b0\u5883\u5909\u6570 <code>JAVA_OPTS<\/code> \u306b\u7af6\u5408\u3059\u308b\u8a2d\u5b9a\u304c\u306a\u3044\u304b<\/li>\n<\/div>\n\n\n<li>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b5\u30fc\u30d0\u30fc\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u30b5\u30fc\u30d0\u30fc\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3092\u78ba\u8a8d<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-57\">\n<p>\u3088\u304f\u3042\u308b\u9593\u9055\u3044\u306b\u306f\u4ee5\u4e0b\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-60\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u3088\u304f\u3042\u308b\u9593\u9055\u3044\u306e\u4f8b<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-58\">\n<li>\u5358\u4f4d\u306e\u6307\u5b9a\u30df\u30b9\uff08\u4f8b\uff1a<code>-Xmx2G<\/code> \u3067\u306f\u306a\u304f <code>-Xmx2g<\/code>\uff09<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-59\">\n<li>\u6570\u5024\u3068\u5358\u4f4d\u306e\u9593\u306e\u30b9\u30da\u30fc\u30b9\uff08\u4f8b\uff1a<code>-Xmx 2g<\/code> \u3067\u306f\u306a\u304f <code>-Xmx2g<\/code>\uff09<\/li>\n<\/div>\n\n\n<li>\u7269\u7406\u30e1\u30e2\u30ea\u4ee5\u4e0a\u306e\u5024\u3092\u8a2d\u5b9a<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-61\">\n<p>\u3053\u308c\u3089\u306e\u65b9\u6cd5\u3092\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001-Xmx\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u6b63\u3057\u304f\u8a2d\u5b9a\u3057\u3001\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u6700\u9069\u306a-Xmx\u5024\u306e\u6c7a\u3081\u65b9\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-62\">\n<h2 class=\"wp-block-heading\" id=\"i-11\">3. -Xmx\u306e\u6700\u9069\u306a\u5024\u306e\u6c7a\u3081\u65b9\uff1a5\u3064\u306e\u91cd\u8981\u306a\u8003\u616e\u70b9<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-63\">\n<p>-Xmx\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u6700\u9069\u306a\u5024\u3092\u6c7a\u5b9a\u3059\u308b\u3053\u3068\u306f\u3001Java\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u5b89\u5b9a\u6027\u3092\u78ba\u4fdd\u3059\u308b\u4e0a\u3067\u6975\u3081\u3066\u91cd\u8981\u3067\u3059\u3002\u4ee5\u4e0b\u306e5\u3064\u306e\u8003\u616e\u70b9\u3092\u8e0f\u307e\u3048\u308b\u3053\u3068\u3067\u3001\u3042\u306a\u305f\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u6700\u9069\u306a-Xmx\u5024\u3092\u898b\u3064\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-64\">\n<h3 class=\"wp-block-heading\" id=\"i-12\">1. \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8981\u4ef6\u5206\u6790<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-65\">\n<p>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u7279\u6027\u3092\u6df1\u304f\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u3001\u9069\u5207\u306a-Xmx\u5024\u306e\u6c7a\u5b9a\u306e\u51fa\u767a\u70b9\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-69\">\n<li>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u4e88\u6e2c\uff1a\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-66\">\n<li>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30b5\u30a4\u30ba\u306e\u898b\u7a4d\u3082\u308a<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-67\">\n<li>\u540c\u6642\u30e6\u30fc\u30b6\u30fc\u6570\u306e\u4e88\u6e2c<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-68\">\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30a4\u30ba\u306e\u8003\u616e<\/li>\n<\/div>\n\n\n<li>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u5206\u6790<\/li>\n<\/ul>\n<\/li>\n<\/div><\/ul>\n\n\n<div id=\"sgb-css-id-70\">\n<p>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u7a2e\u985e\u306b\u3088\u3063\u3066\u8003\u616e\u3059\u3079\u304d\u70b9\u3082\u5909\u308f\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"id-cb2ef936-9705-4210-8fd9-d20c4f35e3cf\"><div id=\"sgb-css-id-71\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u7a2e\u985e<\/th><th>\u4e3b\u306a\u8003\u616e\u70b9<\/th><\/tr><\/thead><tbody><tr><td>\u30d0\u30c3\u30c1\u51e6\u7406<\/td><td>\u30d4\u30fc\u30af\u6642\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf<\/td><\/tr><tr><td>\u30a6\u30a7\u30d6\u30a2\u30d7\u30ea<\/td><td>\u30ea\u30af\u30a8\u30b9\u30c8\u51e6\u7406\u306b\u5fc5\u8981\u306a\u30e1\u30e2\u30ea<\/td><\/tr><tr><td>\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9<\/td><td>\u30b5\u30fc\u30d3\u30b9\u9593\u306e\u901a\u4fe1\u30c7\u30fc\u30bf\u30b5\u30a4\u30ba<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n<div id=\"sgb-css-id-72\">\n<p>\u307e\u305f\u3001\u5c06\u6765\u306e\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\u8981\u4ef6\u3082\u8003\u616e\u306b\u5165\u308c\u307e\u3057\u3087\u3046\u3002\u6210\u9577\u4e88\u6e2c\u3084\u8ca0\u8377\u5897\u52a0\u6642\u306e\u5bfe\u5fdc\u7b56\u3092\u4e8b\u524d\u306b\u691c\u8a0e\u3057\u3066\u304a\u304f\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-73\">\n<h3 class=\"wp-block-heading\" id=\"i-13\">2. \u4f7f\u7528\u53ef\u80fd\u306a\u7269\u7406\u30e1\u30e2\u30ea\u3068\u306e\u95a2\u4fc2<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-74\">\n<p>-Xmx\u306e\u5024\u306f\u3001\u4f7f\u7528\u53ef\u80fd\u306a\u7269\u7406\u30e1\u30e2\u30ea\u3068\u306e\u95a2\u4fc2\u3067\u6c7a\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-80\">\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-75\">\n<li>\u4e00\u822c\u7684\u306a\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\uff1a\u7269\u7406\u30e1\u30e2\u30ea\u306e50-80%\u3092\u76ee\u5b89\u306b\u8a2d\u5b9a<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-79\">\n<li>\u8003\u616e\u4e8b\u9805\uff1a\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-76\">\n<li>OS\u7528\u306e\u30e1\u30e2\u30ea\u78ba\u4fdd<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-77\">\n<li>\u4ed6\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3068\u306e\u5171\u5b58<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-78\">\n<li>\u30b9\u30ef\u30c3\u30d4\u30f3\u30b0\u306e\u56de\u907f\uff08\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u4f4e\u4e0b\u306e\u4e3b\u8981\u56e0\uff09<\/li>\n<\/div><\/ul>\n<\/li>\n<\/div><\/ul>\n<\/div>\n\n<div id=\"sgb-css-id-81\">\n<p>\u30b3\u30f3\u30c6\u30ca\u74b0\u5883\u3067\u306e\u904b\u7528\u6642\u306f\u3001\u4ee5\u4e0b\u306e\u70b9\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-82\">\n<li>\u30b3\u30f3\u30c6\u30ca\u306e\u30e1\u30e2\u30ea\u5236\u9650\u3092\u8003\u616e<\/li>\n<\/div>\n\n\n<li>JVM 8u131\u4ee5\u964d\u306e\u30b3\u30f3\u30c6\u30ca\u5bfe\u5fdc\u6a5f\u80fd\u3092\u6d3b\u7528\uff08-XX:+UseContainerSupport\uff09<\/li>\n<\/ul>\n\n\n<div id=\"sgb-css-id-83\">\n<h3 class=\"wp-block-heading\" id=\"i-14\">3. \u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u5f71\u97ff<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-84\">\n<p>-Xmx\u306e\u8a2d\u5b9a\u306f\u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\uff08GC\uff09\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u76f4\u63a5\u5f71\u97ff\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-86\">\n<li>\u30d2\u30fc\u30d7\u30b5\u30a4\u30ba\u3068GC\u983b\u5ea6\u306e\u95a2\u4fc2\uff1a\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-85\">\n<li>\u5927\u304d\u3044\u30d2\u30fc\u30d7 \u2192 GC\u983b\u5ea6\u6e1b\u5c11\u3001\u4f46\u3057GC\u6642\u9593\u306f\u5897\u52a0<\/li>\n<\/div>\n\n\n<li>\u5c0f\u3055\u3044\u30d2\u30fc\u30d7 \u2192 GC\u983b\u5ea6\u5897\u52a0\u3001\u4f46\u3057GC\u6642\u9593\u306f\u77ed\u7e2e<\/li>\n<\/ul>\n<\/li>\n<\/div><\/ul>\n\n\n<div id=\"sgb-css-id-87\">\n<p>GC\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u9078\u629e\u3082\u91cd\u8981\u3067\u3059\uff1a<\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-88\">\n<li>Concurrent Mark Sweep (CMS)\uff1a\u5927\u304d\u3044\u30d2\u30fc\u30d7\u306b\u9069\u3059\u308b<\/li>\n<\/div>\n\n\n<li>G1GC\uff1a\u5927\u898f\u6a21\u30d2\u30fc\u30d7\u5411\u3051\u3001\u81ea\u52d5\u7684\u306b\u30ea\u30fc\u30b8\u30e7\u30f3\u30b5\u30a4\u30ba\u3092\u8abf\u6574<\/li>\n<\/ul>\n\n\n<div id=\"sgb-css-id-89\">\n<p>GC\u30ed\u30b0\u306e\u89e3\u6790\u3092\u901a\u3058\u3066\u3001-Xmx\u8a2d\u5b9a\u306e\u59a5\u5f53\u6027\u3092\u8a55\u4fa1\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">java -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -Xmx4g MyApplication<\/pre>\n\n\n<div id=\"sgb-css-id-90\">\n<p>\u3053\u306e\u30b3\u30de\u30f3\u30c9\u3067GC\u30ed\u30b0\u3092\u51fa\u529b\u3057\u3001GCViewer\u306a\u3069\u306e\u30c4\u30fc\u30eb\u3067\u5206\u6790\u3059\u308b\u3053\u3068\u3067\u3001GC\u306e\u983b\u5ea6\u3084\u6642\u9593\u3092\u8a55\u4fa1\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-91\">\n<h3 class=\"wp-block-heading\" id=\"i-15\">4. \u4ed6\u306eJVM\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u306e\u76f8\u4e92\u4f5c\u7528<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-92\">\n<p>-Xmx\u306f\u5358\u72ec\u3067\u6a5f\u80fd\u3059\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u4ed6\u306eJVM\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u306e\u76f8\u4e92\u4f5c\u7528\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-97\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-93\">\n<li>-Xms\uff08\u521d\u671f\u30d2\u30fc\u30d7\u30b5\u30a4\u30ba\uff09\uff1a-Xmx\u3068\u540c\u3058\u5024\u306b\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u518d\u5272\u308a\u5f53\u3066\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u3092\u524a\u6e1b\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-94\">\n<li>-XX:MaxMetaspaceSize\uff1a\u30e1\u30bf\u30b9\u30da\u30fc\u30b9\u306e\u6700\u5927\u30b5\u30a4\u30ba\u3092\u8a2d\u5b9a\u3002\u30af\u30e9\u30b9\u3084\u30e1\u30bd\u30c3\u30c9\u60c5\u5831\u306e\u4fdd\u5b58\u306b\u5f71\u97ff\u3057\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-96\">\n<li>GC\u95a2\u9023\u30aa\u30d7\u30b7\u30e7\u30f3\uff1a\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-95\">\n<li>-XX:NewRatio\uff1aNew\u9818\u57df\u3068Old\u9818\u57df\u306e\u6bd4\u7387\u3092\u8a2d\u5b9a<\/li>\n<\/div>\n\n\n<li>-XX:SurvivorRatio\uff1aEden\u9818\u57df\u3068Survivor\u9818\u57df\u306e\u6bd4\u7387\u3092\u8a2d\u5b9a<\/li>\n<\/ul>\n<\/li>\n<\/div><\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-98\">\n<p>\u3053\u308c\u3089\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u7d30\u304b\u3044\u30e1\u30e2\u30ea\u7ba1\u7406\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-99\">\n<h3 class=\"wp-block-heading\" id=\"i-16\">5. \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c6\u30b9\u30c8\u306e\u91cd\u8981\u6027<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-100\">\n<p>\u6700\u5f8c\u306b\u3001\u5b9f\u969b\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c6\u30b9\u30c8\u3092\u901a\u3058\u3066-Xmx\u8a2d\u5b9a\u3092\u691c\u8a3c\u3059\u308b\u3053\u3068\u304c\u6975\u3081\u3066\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-103\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u8ca0\u8377\u30c6\u30b9\u30c8\u306e\u8a2d\u8a08\u30dd\u30a4\u30f3\u30c8<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-101\">\n<li>\u5b9f\u969b\u306e\u4f7f\u7528\u30d1\u30bf\u30fc\u30f3\u3092\u6a21\u5023<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-102\">\n<li>\u30d4\u30fc\u30af\u6642\u306e\u8ca0\u8377\u3092\u60f3\u5b9a\u3057\u305f\u30b7\u30ca\u30ea\u30aa\u4f5c\u6210<\/li>\n<\/div>\n\n\n<li>\u9577\u6642\u9593\u5b9f\u884c\u30c6\u30b9\u30c8\u306b\u3088\u308b\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306e\u691c\u51fa<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u4e3b\u8981\u306a\u6e2c\u5b9a\u6307\u6a19<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-104\">\n<li>\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\uff08\u51e6\u7406\u80fd\u529b\uff09<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-105\">\n<li>\u30ec\u30b9\u30dd\u30f3\u30b9\u6642\u9593<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-106\">\n<li>GC\u983b\u5ea6\u3068\u6642\u9593<\/li>\n<\/div>\n\n\n<li>\u30d2\u30fc\u30d7\u4f7f\u7528\u7387<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-107\">\n<p>\u53cd\u5fa9\u7684\u306a\u8abf\u6574\u30d7\u30ed\u30bb\u30b9\u3092\u901a\u3058\u3066\u6700\u9069\u306a-Xmx\u5024\u3092\u898b\u3064\u3051\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u6700\u9069\u306a-Xmx\u5024\u306e\u8a2d\u5b9a<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-108\">\n<li>\u30d9\u30fc\u30b9\u30e9\u30a4\u30f3\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u78ba\u7acb<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-109\">\n<li>-Xmx\u5024\u3092\u6bb5\u968e\u7684\u306b\u5909\u66f4\u3057\u3001\u7d50\u679c\u3092\u6e2c\u5b9a<\/li>\n<\/div>\n\n\n<li>\u6700\u9069\u306a\u30d0\u30e9\u30f3\u30b9\u30dd\u30a4\u30f3\u30c8\u3092\u7279\u5b9a<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-110\">\n<p>\u3053\u308c\u3089\u306e5\u3064\u306e\u8003\u616e\u70b9\u3092\u7dcf\u5408\u7684\u306b\u8a55\u4fa1\u3059\u308b\u3053\u3068\u3067\u3001\u3042\u306a\u305f\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u6700\u9069\u306a-Xmx\u5024\u3092\u6c7a\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u9032\u5316\u3084\u74b0\u5883\u306e\u5909\u5316\u306b\u5fdc\u3058\u3066\u3001\u5b9a\u671f\u7684\u306b\u518d\u8a55\u4fa1\u3068\u8abf\u6574\u3092\u884c\u3046\u3053\u3068\u3092\u5fd8\u308c\u305a\u306b\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-111\">\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u539f\u5247\u3092\u5b9f\u969b\u306e\u30b1\u30fc\u30b9\u30b9\u30bf\u30c7\u30a3\u306b\u9069\u7528\u3057\u3001\u5177\u4f53\u7684\u306a-Xmx\u8a2d\u5b9a\u306e\u4f8b\u3092\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-112\">\n<h2 class=\"wp-block-heading\" id=\"i-17\">4. -Xmx\u30aa\u30d7\u30b7\u30e7\u30f3\u8a2d\u5b9a\u306e\u5b9f\u8df5\u4f8b\uff1a3\u3064\u306e\u4ee3\u8868\u7684\u306a\u30b1\u30fc\u30b9\u30b9\u30bf\u30c7\u30a3<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-113\">\n<p>-Xmx\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u9069\u5207\u306a\u8a2d\u5b9a\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u6027\u8cea\u3084\u904b\u7528\u74b0\u5883\u306b\u3088\u3063\u3066\u5927\u304d\u304f\u7570\u306a\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u30013\u3064\u306e\u4ee3\u8868\u7684\u306a\u30b1\u30fc\u30b9\u3092\u901a\u3058\u3066\u3001\u5b9f\u969b\u306e-Xmx\u6700\u9069\u5316\u30d7\u30ed\u30bb\u30b9\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-114\">\n<h3 class=\"wp-block-heading\" id=\"i-18\">4.1 Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b5\u30fc\u30d0\u30fc\u306e\u6700\u9069\u5316<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-115\">\n<h4 class=\"wp-block-heading\" id=\"i-19\">\u80cc\u666f<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-116\">\n<p>\u3000\u25cf \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\uff1aE\u30b3\u30de\u30fc\u30b9\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\uff08Spring Boot, MySQL, Redis\uff09<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-117\">\n<p>\u3000\u25cf \u74b0\u5883\uff1aAWS EC2 t3.xlarge (4vCPU, 16GB RAM), OpenJDK 11<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-118\">\n<p>\u3000\u25cf \u30c8\u30e9\u30d5\u30a3\u30c3\u30af\uff1a\u5e73\u57471,000\u540c\u6642\u63a5\u7d9a\u3001\u30d4\u30fc\u30af\u66425,000\u540c\u6642\u63a5\u7d9a<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-119\">\n<h4 class=\"wp-block-heading\" id=\"i-20\">\u6700\u9069\u5316\u30d7\u30ed\u30bb\u30b9<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-120\">\n<p>1. \u521d\u671f\u72b6\u614b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-121\">\n<p>\u3000\u25cf \u8a2d\u5b9a\uff1a<code>-Xmx4g<\/code><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-122\">\n<p>\u3000\u25cf \u554f\u984c\uff1a\u30d4\u30fc\u30af\u6642\u306bOutOfMemoryError\u767a\u751f<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-123\">\n<p>2. \u5206\u6790<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-124\">\n<p>\u3000\u25cf \u30d2\u30fc\u30d7\u30c0\u30f3\u30d7\u89e3\u6790\u3067\u30bb\u30c3\u30b7\u30e7\u30f3\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u80a5\u5927\u5316\u3092\u78ba\u8a8d<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-125\">\n<p>\u3000\u25cf GC\u30ed\u30b0\u89e3\u6790\u3067\u983b\u7e41\u306aFull GC\u3092\u691c\u51fa<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-126\">\n<p>3. \u5bfe\u7b56<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-127\">\n<p>\u3000\u25cf \u30bb\u30c3\u30b7\u30e7\u30f3\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u309230\u5206\u304b\u308915\u5206\u306b\u77ed\u7e2e<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-128\">\n<p>\u3000\u25cf \u4e0d\u8981\u306a\u30bb\u30c3\u30b7\u30e7\u30f3\u30c7\u30fc\u30bf\uff08\u5927\u304d\u306a\u4e00\u6642\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff09\u3092\u524a\u6e1b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-129\">\n<p>\u3000\u25cf -Xmx\u8a2d\u5b9a\u306e\u898b\u76f4\u3057\u3068GC\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u5909\u66f4<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-130\">\n<p>4. \u6700\u7d42\u8a2d\u5b9a<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   java -Xmx8g -XX:+UseG1GC -jar myapp.jar<\/pre>\n\n\n<div id=\"sgb-css-id-131\">\n<p>5. \u7d50\u679c<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-132\">\n<p>\u3000\u25cf \u30d4\u30fc\u30af\u6642\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u304c\u5b89\u5b9a<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-133\">\n<p>\u3000\u25cf \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5fdc\u7b54\u6642\u9593\u304c30%\u6539\u5584<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-134\">\n<p>\u3000\u25cf OutOfMemoryError\u304c\u89e3\u6d88<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-135\">\n<h4 class=\"wp-block-heading\" id=\"i-21\">\u6559\u8a13<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-136\">\n<p>Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30bb\u30c3\u30b7\u30e7\u30f3\u7ba1\u7406\u304c-Xmx\u8a2d\u5b9a\u306b\u5927\u304d\u304f\u5f71\u97ff\u3057\u307e\u3059\u3002\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u30d1\u30bf\u30fc\u30f3\u3092\u8003\u616e\u3057\u3001\u30bb\u30c3\u30b7\u30e7\u30f3\u7ba1\u7406\u306e\u6700\u9069\u5316\u3068\u9069\u5207\u306a-Xmx\u8a2d\u5b9a\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-137\">\n<h3 class=\"wp-block-heading\" id=\"i-22\">4.2 \u30d0\u30c3\u30c1\u51e6\u7406\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30e1\u30e2\u30ea\u8a2d\u5b9a<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-138\">\n<h4 class=\"wp-block-heading\" id=\"i-23\">\u80cc\u666f<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-139\">\n<p>\u3000\u25cf \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\uff1a\u65e5\u6b21\u58f2\u4e0a\u96c6\u8a08\u30d0\u30c3\u30c1\uff08Spring Batch\uff09<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-140\">\n<p>\u3000\u25cf \u74b0\u5883\uff1a\u30aa\u30f3\u30d7\u30ec\u30df\u30b9\u30b5\u30fc\u30d0\u30fc (8\u30b3\u30a2, 32GB RAM), Oracle JDK 8<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-141\">\n<p>\u3000\u25cf \u30c7\u30fc\u30bf\u91cf\uff1a1\u65e5\u3042\u305f\u308a\u7d041000\u4e07\u30ec\u30b3\u30fc\u30c9<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-142\">\n<h4 class=\"wp-block-heading\" id=\"i-24\">\u6700\u9069\u5316\u30d7\u30ed\u30bb\u30b9<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-143\">\n<p>1. \u521d\u671f\u72b6\u614b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-144\">\n<p>\u3000\u25cf \u8a2d\u5b9a\uff1a<code>-Xmx16g -Xms16g<\/code><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-145\">\n<p>\u3000\u25cf \u554f\u984c\uff1a\u51e6\u7406\u6642\u9593\u304c\u9577\u3044\u3001GC\u306e\u983b\u767a<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-146\">\n<p>2. \u5206\u6790<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-147\">\n<p>\u3000\u25cf GC\u30ed\u30b0\u89e3\u6790\u3067Full GC\u306e\u983b\u767a\u3092\u78ba\u8a8d<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-148\">\n<p>\u3000\u25cf \u30e1\u30e2\u30ea\u4f7f\u7528\u30d1\u30bf\u30fc\u30f3\uff1a\u521d\u671f2GB \u2192 \u30d4\u30fc\u30af12GB \u2192 \u5b8c\u4e86\u66423GB<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-149\">\n<p>3. \u5bfe\u7b56<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-150\">\n<p>\u3000\u25cf \u30d2\u30fc\u30d7\u30b5\u30a4\u30ba\u306e\u62e1\u5927<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-151\">\n<p>\u3000\u25cf G1GC\u306e\u63a1\u7528<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-152\">\n<p>\u3000\u25cf \u30d0\u30c3\u30c1\u30b5\u30a4\u30ba\u306e\u6700\u9069\u5316\uff08\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3068\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u306e\u30d0\u30e9\u30f3\u30b9\uff09<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-153\">\n<p>4. \u6700\u7d42\u8a2d\u5b9a<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   java -Xmx24g -Xms24g -XX:+UseG1GC -XX:MaxGCPauseMillis=200 -jar mybatch.jar<\/pre>\n\n\n<div id=\"sgb-css-id-154\">\n<p>5. \u7d50\u679c<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-155\">\n<p>\u3000\u25cf \u51e6\u7406\u6642\u9593\u304c40%\u77ed\u7e2e<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-156\">\n<p>\u3000\u25cf GC\u983b\u5ea6\u304c75%\u6e1b\u5c11<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-157\">\n<h4 class=\"wp-block-heading\" id=\"i-25\">\u6559\u8a13<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-158\">\n<p>\u30d0\u30c3\u30c1\u51e6\u7406\u3067\u306f\u3001\u30d4\u30fc\u30af\u6642\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306b\u6ce8\u76ee\u3057\u3001\u5341\u5206\u306a-Xmx\u5024\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u540c\u6642\u306b\u3001GC\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u9078\u629e\u3082\u51e6\u7406\u52b9\u7387\u306b\u5927\u304d\u304f\u5f71\u97ff\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-159\">\n<h3 class=\"wp-block-heading\" id=\"i-26\">4.3 \u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3067\u306e\u8003\u616e\u70b9<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-160\">\n<h4 class=\"wp-block-heading\" id=\"i-27\">\u80cc\u666f<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-161\">\n<p>\u3000\u25cf \u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\uff1a20+\u306e\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\uff08Spring Boot, Kotlin, gRPC\uff09<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-162\">\n<p>\u3000\u25cf \u74b0\u5883\uff1aKubernetes on GKE, Docker, OpenJDK 17<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-163\">\n<h4 class=\"wp-block-heading\" id=\"i-28\">\u6700\u9069\u5316\u30d7\u30ed\u30bb\u30b9<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-164\">\n<p>1. \u521d\u671f\u30a2\u30d7\u30ed\u30fc\u30c1<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-165\">\n<p>\u3000\u25cf \u5168\u30b5\u30fc\u30d3\u30b9\u306b\u7d71\u4e00\u7684\u306a\u8a2d\u5b9a\uff1a<code>-Xmx1g<\/code><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-166\">\n<p>\u3000\u25cf \u554f\u984c\uff1a\u30ea\u30bd\u30fc\u30b9\u7121\u99c4\u9063\u3044\u3001\u4e00\u90e8\u30b5\u30fc\u30d3\u30b9\u3067OOM\u767a\u751f<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-167\">\n<p>2. \u5206\u6790<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-168\">\n<p>\u3000\u25cf \u5404\u30b5\u30fc\u30d3\u30b9\u306e\u5f79\u5272\u3068\u30e1\u30e2\u30ea\u4f7f\u7528\u30d1\u30bf\u30fc\u30f3\u3092\u8a73\u7d30\u8abf\u67fb<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-169\">\n<p>\u3000\u25cf \u30b3\u30f3\u30c6\u30ca\u30ea\u30bd\u30fc\u30b9\u5236\u9650\u3068\u306e\u6574\u5408\u6027\u78ba\u8a8d<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-170\">\n<p>3. \u5bfe\u7b56<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-171\">\n<p>\u3000\u25cf \u30b5\u30fc\u30d3\u30b9\u5225\u306e-Xmx\u8a2d\u5b9a<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-172\">\n<p>\u3000\u25cf \u30b3\u30f3\u30c6\u30ca\u30ea\u30bd\u30fc\u30b9\u5236\u9650\u3068\u306e\u6574\u5408<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-173\">\n<p>\u3000\u25cf \u81ea\u52d5\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u30dd\u30ea\u30b7\u30fc\u306e\u8abf\u6574<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-174\">\n<p>4. \u6700\u7d42\u8a2d\u5b9a\u4f8b<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   # \u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9API\n   java -Xmx512m -jar frontend-api.jar\n\n   # \u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u30b5\u30fc\u30d3\u30b9\n   java -Xmx1g -jar business-logic.jar\n\n   # \u30c7\u30fc\u30bf\u30a2\u30af\u30bb\u30b9\u30b5\u30fc\u30d3\u30b9\n   java -Xmx1.5g -jar data-access.jar\n\n   # \u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30b5\u30fc\u30d3\u30b9\n   java -Xmx256m -jar utility-service.jar<\/pre>\n\n\n<div id=\"sgb-css-id-175\">\n<p>5. \u7d50\u679c<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-176\">\n<p>\u3000\u25cf \u30ea\u30bd\u30fc\u30b9\u4f7f\u7528\u52b9\u7387\u304c35%\u5411\u4e0a<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-177\">\n<p>\u3000\u25cf \u30b5\u30fc\u30d3\u30b9\u5168\u4f53\u306e\u5b89\u5b9a\u6027\u304c\u5411\u4e0a<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-178\">\n<h4 class=\"wp-block-heading\" id=\"i-29\">\u6559\u8a13<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-179\">\n<p>\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3067\u306f\u3001\u5404\u30b5\u30fc\u30d3\u30b9\u306e\u5f79\u5272\u306b\u5fdc\u3058\u3066-Xmx\u5024\u3092\u500b\u5225\u306b\u6700\u9069\u5316\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u307e\u305f\u3001\u30b3\u30f3\u30c6\u30ca\u74b0\u5883\u3067\u306f\u3001JVM\u306e\u30e1\u30e2\u30ea\u8a2d\u5b9a\u3068\u30b3\u30f3\u30c6\u30ca\u306e\u30ea\u30bd\u30fc\u30b9\u5236\u9650\u3092\u9069\u5207\u306b\u8abf\u6574\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-180\">\n<h3 class=\"wp-block-heading\" id=\"i-30\">\u307e\u3068\u3081\uff1a-Xmx\u6700\u9069\u5316\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-181\">\n<p>1. \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u7279\u6027\u3092\u7406\u89e3\u3059\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-182\">\n<p>\u3000\u25cf \u30e1\u30e2\u30ea\u4f7f\u7528\u30d1\u30bf\u30fc\u30f3<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-183\">\n<p>\u3000\u25cf \u30d4\u30fc\u30af\u6642\u306e\u8981\u4ef6<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-184\">\n<p>\u3000\u25cf \u51e6\u7406\u306e\u6027\u8cea\uff08\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0 vs \u30d0\u30c3\u30c1\uff09<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-185\">\n<p>2. \u904b\u7528\u74b0\u5883\u3092\u8003\u616e\u3059\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-186\">\n<p>\u3000\u25cf \u5229\u7528\u53ef\u80fd\u306a\u7269\u7406\u30e1\u30e2\u30ea<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-187\">\n<p>\u3000\u25cf \u30b3\u30f3\u30c6\u30ca\u5316\u306e\u6709\u7121<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-188\">\n<p>\u3000\u25cf \u4ed6\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3068\u306e\u5171\u5b58<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-189\">\n<p>3. \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6307\u6a19\u3092\u5b9a\u7fa9\u3057\u3001\u6e2c\u5b9a\u3059\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-190\">\n<p>\u3000\u25cf \u30ec\u30b9\u30dd\u30f3\u30b9\u30bf\u30a4\u30e0<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-191\">\n<p>\u3000\u25cf \u30b9\u30eb\u30fc\u30d7\u30c3\u30c8<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-192\">\n<p>\u3000\u25cf GC\u983b\u5ea6\u3068\u6642\u9593<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-193\">\n<p>4. \u6bb5\u968e\u7684\u306b-Xmx\u5024\u3092\u8abf\u6574\u3057\u3001\u7d50\u679c\u3092\u89b3\u5bdf\u3059\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-194\">\n<p>5. \u4ed6\u306eJVM\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u306e\u76f8\u4e92\u4f5c\u7528\u3092\u8003\u616e\u3059\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-195\">\n<p>\u3000\u25cf GC\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-196\">\n<p>\u3000\u25cf -Xms\uff08\u521d\u671f\u30d2\u30fc\u30d7\u30b5\u30a4\u30ba\uff09<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-197\">\n<p>6. \u8ca0\u8377\u30c6\u30b9\u30c8\u3092\u5b9f\u65bd\u3057\u3001\u5b9f\u969b\u306e\u4f7f\u7528\u30d1\u30bf\u30fc\u30f3\u3092\u30b7\u30df\u30e5\u30ec\u30fc\u30c8\u3059\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-198\">\n<p>7. \u5b9a\u671f\u7684\u306b\u8a2d\u5b9a\u3092\u898b\u76f4\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u9032\u5316\u306b\u5408\u308f\u305b\u3066\u8abf\u6574\u3059\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-199\">\n<p>\u3053\u308c\u3089\u306e\u30b1\u30fc\u30b9\u30b9\u30bf\u30c7\u30a3\u304b\u3089\u5206\u304b\u308b\u3088\u3046\u306b\u3001-Xmx\u306e\u6700\u9069\u306a\u8a2d\u5b9a\u306f\u4e00\u69d8\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u7279\u6027\u3001\u904b\u7528\u74b0\u5883\u3001\u305d\u3057\u3066\u5b9f\u969b\u306e\u4f7f\u7528\u30d1\u30bf\u30fc\u30f3\u3092\u7dcf\u5408\u7684\u306b\u8003\u616e\u3057\u3001\u7d99\u7d9a\u7684\u306a\u89b3\u5bdf\u3068\u8abf\u6574\u3092\u884c\u3046\u3053\u3068\u304c\u3001\u6700\u9069\u306a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5f15\u304d\u51fa\u3059\u9375\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-200\">\n<h2 class=\"wp-block-heading\" id=\"i-31\">5. -Xmx\u306b\u95a2\u9023\u3059\u308b\u554f\u984c\u306e\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-201\">\n<p>-Xmx\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u8a2d\u5b9a\u306f\u3001Java\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5b89\u5b9a\u6027\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u76f4\u63a5\u5f71\u97ff\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001-Xmx\u306b\u95a2\u9023\u3059\u308b\u4e3b\u8981\u306a\u554f\u984c\u3068\u305d\u306e\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-202\">\n<h3 class=\"wp-block-heading\" id=\"i-32\">5.1 OutOfMemoryError\u306e\u539f\u56e0\u3068\u5bfe\u7b56<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-203\">\n<p>OutOfMemoryError\uff08OOM\uff09\u306f\u3001JVM\u304c\u30e1\u30e2\u30ea\u3092\u5272\u308a\u5f53\u3066\u3089\u308c\u306a\u304f\u306a\u3063\u305f\u969b\u306b\u767a\u751f\u3057\u307e\u3059\u3002\u4e3b\u306a\u539f\u56e0\u3068\u5bfe\u7b56\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-204\">\n<p>1. <strong>\u30d2\u30fc\u30d7\u9818\u57df\u306e\u4e0d\u8db3<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-205\">\n<p>\u3000\u25cf \u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\uff1a <code>java.lang.OutOfMemoryError: Java heap space<\/code><\/p>\n<\/div>\n\n\n<p>\u3000\u25cf \u5bfe\u7b56\uff1a -Xmx\u5024\u3092\u5897\u3084\u3059\u3002\u305f\u3060\u3057\u3001\u7269\u7406\u30e1\u30e2\u30ea\u306e\u5236\u9650\u306b\u6ce8\u610f\u3002<\/p>\n\n\n<div id=\"sgb-css-id-206\">\n<p>2. <strong>GC\u306e\u975e\u52b9\u7387<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-207\">\n<p>\u3000\u25cf \u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\uff1a <code><code>java.lang.OutOfMemoryError: GC overhead limit exceeded<\/code><\/code><\/p>\n<\/div>\n\n\n<p>\u3000\u25cf \u5bfe\u7b56\uff1a \u30d2\u30fc\u30d7\u30b5\u30a4\u30ba\u306e\u8abf\u6574\u3084GC\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u5909\u66f4\u3092\u691c\u8a0e\u3002<\/p>\n\n\n<div id=\"sgb-css-id-208\">\n<p>3. <strong>Metaspace\u9818\u57df\u306e\u4e0d\u8db3 (Java 8\u4ee5\u964d)<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-209\">\n<p>\u3000\u25cf \u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\uff1a <code><code>java.lang.OutOfMemoryError: Metaspace<\/code><\/code><\/p>\n<\/div>\n\n\n<p>\u3000\u25cf \u5bfe\u7b56\uff1a <code>-XX:MaxMetaspaceSize=&lt;size&gt;<\/code> \u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u62e1\u5927\u3002<\/p>\n\n\n<div id=\"sgb-css-id-210\">\n<p>\u30d2\u30fc\u30d7\u30c0\u30f3\u30d7\u3092\u53d6\u5f97\u3057\u3066\u5206\u6790\u3059\u308b\u3053\u3068\u304c\u3001\u554f\u984c\u306e\u6839\u672c\u539f\u56e0\u3092\u7279\u5b9a\u3059\u308b\u4e0a\u3067\u975e\u5e38\u306b\u6709\u52b9\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">jcmd &lt;pid&gt; GC.heap_dump &lt;file_path&gt;<\/pre>\n\n\n<div id=\"sgb-css-id-211\">\n<p>\u307e\u305f\u3001\u4ee5\u4e0b\u306eJVM\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001OOM\u767a\u751f\u6642\u306b\u81ea\u52d5\u7684\u306b\u30d2\u30fc\u30d7\u30c0\u30f3\u30d7\u3092\u751f\u6210\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">-XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=&lt;file_path&gt;<\/pre>\n\n\n<div id=\"sgb-css-id-212\">\n<h3 class=\"wp-block-heading\" id=\"i-33\">5.2 \u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306e\u691c\u51fa\u3068\u89e3\u6c7a\u65b9\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-213\">\n<p>\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306f\u3001\u4e0d\u8981\u306b\u306a\u3063\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u89e3\u653e\u3055\u308c\u305a\u306b\u30e1\u30e2\u30ea\u3092\u5360\u6709\u3057\u7d9a\u3051\u308b\u72b6\u614b\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u624b\u9806\u3067\u691c\u51fa\u3068\u89e3\u6c7a\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-214\">\n<p>1. <strong>\u75c7\u72b6\u306e\u78ba\u8a8d<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-215\">\n<p>\u3000\u25cf \u6642\u9593\u7d4c\u904e\u3068\u3068\u3082\u306b\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u304c\u5897\u52a0<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-216\">\n<p>\u3000\u25cf GC\u306e\u983b\u5ea6\u304c\u5897\u52a0<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-217\">\n<p>\u3000\u25cf \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5fdc\u7b54\u6027\u4f4e\u4e0b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-218\">\n<p>2. <strong>\u30d2\u30fc\u30d7\u30d2\u30b9\u30c8\u30b0\u30e9\u30e0\u306e\u5206\u6790<\/strong><\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   jcmd &lt;pid&gt; GC.class_histogram<\/pre>\n\n\n<div id=\"sgb-css-id-219\">\n<p>\u3053\u306e\u30b3\u30de\u30f3\u30c9\u3067\u3001\u30e1\u30e2\u30ea\u3092\u6700\u3082\u6d88\u8cbb\u3057\u3066\u3044\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u7a2e\u985e\u3092\u7279\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-220\">\n<p>3. <strong>\u30d7\u30ed\u30d5\u30a1\u30a4\u30ea\u30f3\u30b0\u30c4\u30fc\u30eb\u306e\u4f7f\u7528<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-221\">\n<p>\u3000\u25cf JProfiler\u3001YourKit\u3001VisualVM\u306a\u3069\u306e\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u3066\u8a73\u7d30\u306a\u5206\u6790\u3092\u884c\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-222\">\n<p>4. <strong>\u3088\u304f\u3042\u308b\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u30d1\u30bf\u30fc\u30f3\u306e\u78ba\u8a8d<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-223\">\n<p>\u3000\u25cf \u9759\u7684\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3078\u306e\u7121\u5236\u9650\u306a\u8ffd\u52a0<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-224\">\n<p>\u3000\u25cf \u30ea\u30bd\u30fc\u30b9\uff08\u30d5\u30a1\u30a4\u30eb\u3001DB\u63a5\u7d9a\u306a\u3069\uff09\u306e\u30af\u30ed\u30fc\u30ba\u5fd8\u308c<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-225\">\n<p>\u3000\u25cf \u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u4e0d\u9069\u5207\u306a\u7ba1\u7406<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-226\">\n<p>\u6ce8\u610f\uff1a\u5927\u304d\u306a-Xmx\u5024\u3092\u8a2d\u5b9a\u3059\u308b\u3068\u3001\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306e\u767a\u898b\u304c\u9045\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u9069\u5207\u306a\u30b5\u30a4\u30ba\u8a2d\u5b9a\u3068\u5b9a\u671f\u7684\u306a\u76e3\u8996\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-227\">\n<h3 class=\"wp-block-heading\" id=\"i-34\">5.3 \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u4f4e\u4e0b\u6642\u306e\u30c7\u30d0\u30c3\u30b0\u624b\u9806<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-228\">\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u4f4e\u4e0b\u306e\u539f\u56e0\u306f\u591a\u5c90\u306b\u308f\u305f\u308a\u307e\u3059\u304c\u3001\u4ee5\u4e0b\u306e\u624b\u9806\u3067\u4f53\u7cfb\u7684\u306b\u30c7\u30d0\u30c3\u30b0\u3092\u884c\u3048\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-229\">\n<p>1. <strong>GC\u30ed\u30b0\u306e\u89e3\u6790<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-230\">\n<p>\u3000GC\u30ed\u30b0\u3092\u6709\u52b9\u306b\u3059\u308bJVM\u30aa\u30d7\u30b7\u30e7\u30f3\uff1a<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -Xloggc:&lt;file_path&gt;<\/pre>\n\n\n\n<p>GC\u30ed\u30b0\u3092\u5206\u6790\u3057\u3001GC\u983b\u5ea6\u3084\u6642\u9593\u304c\u9069\u5207\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n\n\n<div id=\"sgb-css-id-231\">\n<p>2. <strong>\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u306e\u53d6\u5f97\u3068\u5206\u6790<\/strong><\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   jcmd &lt;pid&gt; Thread.print<\/pre>\n\n\n\n<p>\u3053\u306e\u30b3\u30de\u30f3\u30c9\u3067\u30b9\u30ec\u30c3\u30c9\u306e\u72b6\u614b\u3092\u78ba\u8a8d\u3057\u3001\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u3084\u30b9\u30ec\u30c3\u30c9\u7af6\u5408\u3092\u7279\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n<div id=\"sgb-css-id-232\">\n<p>3.<strong> -Xmx\u306e\u5f71\u97ff\u306e\u8a55\u4fa1<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-233\">\n<p>\u3000\u25cf \u5c0f\u3055\u3059\u304e\u308b\u5024\uff1a\u983b\u7e41\u306aGC\u306b\u3088\u308b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u4f4e\u4e0b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-234\">\n<p>\u3000\u25cf \u5927\u304d\u3059\u304e\u308b\u5024\uff1aGC\u505c\u6b62\u6642\u9593\u306e\u5897\u52a0 \u9069\u5207\u306a-Xmx\u5024\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u7279\u6027\u3068\u5229\u7528\u53ef\u80fd\u306a\u7269\u7406\u30e1\u30e2\u30ea\u306e\u30d0\u30e9\u30f3\u30b9\u3067\u6c7a\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-235\">\n<p>4.<strong> \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u306e\u30b9\u30c6\u30c3\u30d7<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-236\">\n<p>\u30001. \u30d9\u30fc\u30b9\u30e9\u30a4\u30f3\u306e\u78ba\u7acb<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-237\">\n<p>\u30002. \u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u306e\u7279\u5b9a<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-238\">\n<p>\u30003. \u4eee\u8aac\u306e\u7acb\u6848<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-239\">\n<p>\u30004. \u5909\u66f4\u306e\u9069\u7528<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-240\">\n<p>\u30005. \u7d50\u679c\u306e\u6e2c\u5b9a\u3068\u691c\u8a3c<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-241\">\n<p>\u30006. \u5fc5\u8981\u306b\u5fdc\u3058\u3066\u7e70\u308a\u8fd4\u3057<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-242\">\n<h3 class=\"wp-block-heading\" id=\"i-35\">\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-248\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-243\">\n<li>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u76e3\u8996\u3057\u3066\u3044\u308b\u304b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-244\">\n<li>GC\u30ed\u30b0\u3092\u5b9a\u671f\u7684\u306b\u5206\u6790\u3057\u3066\u3044\u308b\u304b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-245\">\n<li>OOM\u767a\u751f\u6642\u306e\u30d2\u30fc\u30d7\u30c0\u30f3\u30d7\u81ea\u52d5\u751f\u6210\u3092\u8a2d\u5b9a\u3057\u3066\u3044\u308b\u304b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-246\">\n<li>\u30d7\u30ed\u30d5\u30a1\u30a4\u30ea\u30f3\u30b0\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u3066\u5b9a\u671f\u7684\u306b\u5206\u6790\u3092\u884c\u3063\u3066\u3044\u308b\u304b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-247\">\n<li>-Xmx\u5024\u3092\u542b\u3080JVM\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u5b9a\u671f\u7684\u306b\u898b\u76f4\u3057\u3066\u3044\u308b\u304b<\/li>\n<\/div>\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c6\u30b9\u30c8\u3092\u5b9a\u671f\u7684\u306b\u5b9f\u65bd\u3057\u3066\u3044\u308b\u304b<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-249\">\n<p>\u3053\u308c\u3089\u306e\u65b9\u6cd5\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001-Xmx\u306b\u95a2\u9023\u3059\u308b\u591a\u304f\u306e\u554f\u984c\u3092\u52b9\u679c\u7684\u306b\u8a3a\u65ad\u3057\u3001\u89e3\u6c7a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u5404\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306f\u56fa\u6709\u306e\u7279\u6027\u3092\u6301\u3064\u305f\u3081\u3001\u3053\u308c\u3089\u306e\u624b\u6cd5\u3092\u57fa\u672c\u3068\u3057\u3064\u3064\u3001\u500b\u3005\u306e\u72b6\u6cc1\u306b\u5fdc\u3058\u305f\u30a2\u30d7\u30ed\u30fc\u30c1\u304c\u5fc5\u8981\u3068\u306a\u308b\u3053\u3068\u3092\u5fd8\u308c\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-250\">\n<h2 class=\"wp-block-heading\" id=\"i-36\">6. -Xmx\u3068\u95a2\u9023\u3059\u308bJVM\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u7dcf\u5408\u7684\u306a\u6d3b\u7528\u6cd5<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-251\">\n<p>-Xmx\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3059\u308b\u306b\u306f\u3001\u4ed6\u306eJVM\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u306e\u9069\u5207\u306a\u7d44\u307f\u5408\u308f\u305b\u304c\u91cd\u8981\u3067\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u95a2\u9023\u3059\u308b\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u306e\u9023\u643a\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u3001\u7dcf\u5408\u7684\u306a\u6700\u9069\u5316\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u63d0\u793a\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-252\">\n<h3 class=\"wp-block-heading\" id=\"i-37\">6.1 -Xms\u3068\u306e\u95a2\u4fc2\u6027\u3068\u63a8\u5968\u8a2d\u5b9a<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-253\">\n<p>-Xms\u306f\u521d\u671f\u30d2\u30fc\u30d7\u30b5\u30a4\u30ba\u3092\u6307\u5b9a\u3059\u308b\u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u3001-Xmx\u3068\u306e\u95a2\u4fc2\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-255\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u95a2\u4fc2\u6027<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-254\">\n<li>-Xmx\uff1a\u6700\u5927\u30d2\u30fc\u30d7\u30b5\u30a4\u30ba<\/li>\n<\/div>\n\n\n<li>-Xms\uff1a\u521d\u671f\u30d2\u30fc\u30d7\u30b5\u30a4\u30ba<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u63a8\u5968\u8a2d\u5b9a<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-256\">\n<li>\u4e00\u822c\u7684\u306b\u306f\u3001-Xms\u3068-Xmx\u3092\u540c\u3058\u5024\u306b\u8a2d\u5b9a\uff08\u30e1\u30e2\u30ea\u518d\u5272\u308a\u5f53\u3066\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u3092\u524a\u6e1b\uff09<\/li>\n<\/div>\n\n\n<li>\u5909\u52d5\u306e\u5927\u304d\u3044\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u3067\u306f\u3001-Xms\u3092-Xmx\u3088\u308a\u5c0f\u3055\u304f\u8a2d\u5b9a\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u62e1\u5927<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-257\">\n<p>\u8a2d\u5b9a\u4f8b\uff1a<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\njava -Xms4g -Xmx4g -jar myapp.jar\n\n# \u30d0\u30c3\u30c1\u51e6\u7406\njava -Xms8g -Xmx8g -jar mybatch.jar\n\n# \u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\njava -Xms512m -Xmx512m -jar myservice.jar<\/pre>\n\n\n<div id=\"sgb-css-id-258\">\n<h3 class=\"wp-block-heading\" id=\"i-38\">6.2 \u4ed6\u306e\u30e1\u30e2\u30ea\u95a2\u9023\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u306e\u7d44\u307f\u5408\u308f\u305b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-259\">\n<p>Metaspace\u95a2\u9023\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3082\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-261\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">Metaspace\u95a2\u9023\u306e\u30aa\u30d7\u30b7\u30e7\u30f3<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-260\">\n<li>-XX:MaxMetaspaceSize\uff1aMetaspace\u306e\u6700\u5927\u30b5\u30a4\u30ba<\/li>\n<\/div>\n\n\n<li>-XX:MetaspaceSize\uff1aMetaspace\u306e\u521d\u671f\u30b5\u30a4\u30ba\u3068\u30d5\u30ebGC\u306e\u30c8\u30ea\u30ac\u30fc\u30b5\u30a4\u30ba<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-262\">\n<p>\u3053\u308c\u3089\u306f-Xmx\u3068\u306f\u72ec\u7acb\u3057\u3066\u52d5\u4f5c\u3057\u307e\u3059\u304c\u3001\u7dcf\u5408\u7684\u306a\u30e1\u30e2\u30ea\u7ba1\u7406\u306b\u5f71\u97ff\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-263\">\n<p>\u8a2d\u5b9a\u4f8b\uff1a<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">java -Xmx4g -XX:MaxMetaspaceSize=256m -jar myapp.jar<\/pre>\n\n\n<div id=\"sgb-css-id-264\">\n<p>\u6ce8\u610f\uff1aMetaspace\u306eOOM\u306f-Xmx\u306e\u8a2d\u5b9a\u306b\u95a2\u4fc2\u306a\u304f\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-265\">\n<h3 class=\"wp-block-heading\" id=\"i-39\">6.3 \u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u306e\u6700\u9069\u306a\u9023\u643a<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-266\">\n<p>GC\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u9078\u629e\u3068-Xmx\u306f\u5bc6\u63a5\u306b\u95a2\u9023\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-270\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">GC\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u9078\u629e<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-267\">\n<li>Serial GC\uff1a\u5c0f\u3055\u3044\u30d2\u30fc\u30d7\u30b5\u30a4\u30ba\u306b\u9069\u3059\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-268\">\n<li>Parallel GC\uff1a\u5927\u304d\u3044\u30d2\u30fc\u30d7\u30b5\u30a4\u30ba\u3068\u9ad8\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u306b\u9069\u3059\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-269\">\n<li>CMS\uff1a\u4f4e\u505c\u6b62\u6642\u9593\u3092\u76ee\u6307\u3059\u3001\u5927\u304d\u3044\u30d2\u30fc\u30d7\u30b5\u30a4\u30ba\u306b\u9069\u3059\u308b<\/li>\n<\/div>\n\n\n<li>G1 GC\uff1a\u5927\u898f\u6a21\u30d2\u30fc\u30d7\u5411\u3051\u306e\u4f4e\u505c\u6b62\u6642\u9593GC<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-273\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u95a2\u9023\u3059\u308bGC\u30aa\u30d7\u30b7\u30e7\u30f3<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-271\">\n<li>-XX:NewRatio\uff1aOld\u9818\u57df\u3068Young\u9818\u57df\u306e\u6bd4\u7387<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-272\">\n<li>-XX:SurvivorRatio\uff1aEden\u9818\u57df\u3068Survivor\u9818\u57df\u306e\u6bd4\u7387<\/li>\n<\/div>\n\n\n<li>-XX:MaxGCPauseMillis\uff1aGC\u505c\u6b62\u6642\u9593\u306e\u76ee\u6a19\u5024\uff08G1GC\u7528\uff09<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-274\">\n<p>\u8a2d\u5b9a\u4f8b\uff1a<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u9ad8\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u91cd\u8996\njava -Xmx10g -XX:+UseParallelGC -jar myapp.jar\n\n# \u4f4e\u30ec\u30a4\u30c6\u30f3\u30b7\u91cd\u8996\njava -Xmx10g -XX:+UseG1GC -XX:MaxGCPauseMillis=200 -jar myapp.jar<\/pre>\n\n\n<div id=\"sgb-css-id-275\">\n<h3 class=\"wp-block-heading\" id=\"i-40\">6.4 \u7dcf\u5408\u7684\u306a\u8a2d\u5b9a\u4f8b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-276\">\n<p>\u7570\u306a\u308b\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3067\u306e\u7dcf\u5408\u7684\u306a\u8a2d\u5b9a\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-277\">\n<p>1. Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   java -Xms4g -Xmx4g -XX:MaxMetaspaceSize=256m -XX:+UseG1GC -XX:MaxGCPauseMillis=200 -jar mywebapp.jar<\/pre>\n\n\n<div id=\"sgb-css-id-278\">\n<p>2. \u30d0\u30c3\u30c1\u51e6\u7406<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   java -Xms8g -Xmx8g -XX:MaxMetaspaceSize=512m -XX:+UseParallelGC -XX:ParallelGCThreads=4 -jar mybatch.jar<\/pre>\n\n\n<div id=\"sgb-css-id-279\">\n<p>3. \u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   java -Xms512m -Xmx512m -XX:MaxMetaspaceSize=128m -XX:+UseG1GC -XX:MaxGCPauseMillis=100 -jar myservice.jar<\/pre>\n\n\n<div id=\"sgb-css-id-280\">\n<h3 class=\"wp-block-heading\" id=\"i-41\">6.5 JVM\u30aa\u30d7\u30b7\u30e7\u30f3\u8a2d\u5b9a\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-285\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">JVM\u30aa\u30d7\u30b7\u30e7\u30f3\u8a2d\u5b9a\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-281\">\n<li>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u7279\u6027\u3068\u8981\u4ef6\u3092\u5341\u5206\u306b\u7406\u89e3\u3059\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-282\">\n<li>\u6bb5\u968e\u7684\u306b\u8a2d\u5b9a\u3092\u8abf\u6574\u3057\u3001\u5404\u5909\u66f4\u5f8c\u306b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6e2c\u5b9a\u3059\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-283\">\n<li>\u958b\u767a\u3001\u30c6\u30b9\u30c8\u3001\u672c\u756a\u74b0\u5883\u3067\u7570\u306a\u308b\u8a2d\u5b9a\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u304c\u3042\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-284\">\n<li>\u5b9a\u671f\u7684\u306bGC\u30ed\u30b0\u3092\u5206\u6790\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u8a2d\u5b9a\u3092\u6700\u9069\u5316\u3059\u308b<\/li>\n<\/div>\n\n\n<li>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u9032\u5316\u3084\u8ca0\u8377\u306e\u5909\u5316\u306b\u5fdc\u3058\u3066\u8a2d\u5b9a\u3092\u898b\u76f4\u3059<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-286\">\n<h3 class=\"wp-block-heading\" id=\"i-42\">6.6 \u6ce8\u610f\u70b9\u3068\u3088\u304f\u3042\u308b\u843d\u3068\u3057\u7a74<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-290\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u6ce8\u610f\u70b9\u3068\u3088\u304f\u3042\u308b\u843d\u3068\u3057\u7a74<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-287\">\n<li>\u7269\u7406\u30e1\u30e2\u30ea\u4ee5\u4e0a\u306e-Xmx\u3092\u8a2d\u5b9a\u3057\u306a\u3044\u3053\u3068<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-288\">\n<li>\u904e\u5ea6\u306b\u5927\u304d\u306a-Xmx\u5024\u306fGC\u505c\u6b62\u6642\u9593\u3092\u5897\u52a0\u3055\u305b\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-289\">\n<li>\u30b3\u30f3\u30c6\u30ca\u74b0\u5883\u3067\u306f\u3001JVM\u304c\u30b3\u30f3\u30c6\u30ca\u306e\u30e1\u30e2\u30ea\u5236\u9650\u3092\u8a8d\u8b58\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b \uff08\u4f8b\uff1aJava 8u191\u4ee5\u964d\u3067 <code>-XX:+UseContainerSupport<\/code> \u3092\u4f7f\u7528\uff09<\/li>\n<\/div>\n\n\n<li>\u8907\u6570\u306eJVM\u304c\u540c\u3058\u30de\u30b7\u30f3\u3067\u52d5\u4f5c\u3059\u308b\u5834\u5408\u3001\u30ea\u30bd\u30fc\u30b9\u306e\u7af6\u5408\u306b\u6ce8\u610f<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-291\">\n<p>JVM\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u7dcf\u5408\u7684\u306a\u6d3b\u7528\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u7279\u6027\u3068\u904b\u7528\u74b0\u5883\u3092\u6df1\u304f\u7406\u89e3\u3057\u305f\u4e0a\u3067\u3001\u6bb5\u968e\u7684\u306a\u8abf\u6574\u3068\u7d99\u7d9a\u7684\u306a\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u3092\u901a\u3058\u3066\u5b9f\u73fe\u3055\u308c\u307e\u3059\u3002-Xmx\u3092\u4ed6\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u52b9\u7387\u3001GC\u6027\u80fd\u3001\u5168\u4f53\u7684\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-292\">\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u8a2d\u5b9a\u304c\u5c06\u6765\u306eJava\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u3069\u306e\u3088\u3046\u306b\u5909\u5316\u3059\u308b\u304b\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-293\">\n<h2 class=\"wp-block-heading\" id=\"i-43\">7. \u672a\u6765\u3092\u898b\u636e\u3048\u305f-Xmx\u8a2d\u5b9a\uff1aJava 9\u4ee5\u964d\u306e\u5909\u66f4\u70b9\u3068\u6700\u65b0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-294\">\n<p>Java 9\u4ee5\u964d\u3001JVM\u306e\u30e1\u30e2\u30ea\u7ba1\u7406\u306f\u5927\u304d\u304f\u9032\u5316\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u6700\u65b0\u306e\u5909\u66f4\u70b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u7d39\u4ecb\u3057\u3001\u672a\u6765\u306e-Xmx\u8a2d\u5b9a\u306e\u3042\u308a\u65b9\u3092\u63a2\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-295\">\n<h3 class=\"wp-block-heading\" id=\"i-44\">7.1 \u30e2\u30b8\u30e5\u30fc\u30eb\u30b7\u30b9\u30c6\u30e0\u304c\u30e1\u30e2\u30ea\u7ba1\u7406\u306b\u4e0e\u3048\u308b\u5f71\u97ff<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-296\">\n<p>Java 9\u3067\u5c0e\u5165\u3055\u308c\u305f\u30e2\u30b8\u30e5\u30fc\u30eb\u30b7\u30b9\u30c6\u30e0\uff08Project Jigsaw\uff09\u306f\u3001Java\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306e\u69cb\u9020\u3092\u6839\u672c\u7684\u306b\u5909\u66f4\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u306f\u30e1\u30e2\u30ea\u7ba1\u7406\u306b\u3082\u5927\u304d\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u30e2\u30b8\u30e5\u30fc\u30eb\u30b7\u30b9\u30c6\u30e0\u304c\u4e0e\u3048\u308b\u5f71\u97ff<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-297\">\n<li>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u524a\u6e1b\uff1a\u5fc5\u8981\u306a\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u307f\u3092\u30ed\u30fc\u30c9\u3059\u308b\u3053\u3068\u3067\u3001\u5168\u4f53\u7684\u306a\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u304c\u6e1b\u5c11\u3057\u307e\u3057\u305f\u3002<\/li>\n<\/div>\n\n\n<li>\u8d77\u52d5\u6642\u306e\u30e1\u30e2\u30ea\u6700\u9069\u5316\uff1a\u7279\u306b\u5c0f\u898f\u6a21\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u3001\u8d77\u52d5\u6642\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u304c\u5927\u5e45\u306b\u6e1b\u5c11\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-298\">\n<p>\u4f8b\u3048\u3070\u3001\u5178\u578b\u7684\u306aHello World\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5909\u5316\u3057\u307e\u3057\u305f\u3002<\/p>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">Hello World\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u4f8b<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-299\">\n<li>Java 8\uff1a\u7d0430MB<\/li>\n<\/div>\n\n\n<li>Java 9\u4ee5\u964d\uff1a\u7d0410MB<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-300\">\n<p>\u3053\u308c\u306b\u3088\u308a\u3001-Xmx\u8a2d\u5b9a\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u3082\u5909\u308f\u308a\u3064\u3064\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">-Xmx\u8a2d\u5b9a\u306e\u30a2\u30d7\u30ed\u30fc\u30c1<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-301\">\n<li>\u30e2\u30b8\u30e5\u30fc\u30eb\u5316\u3055\u308c\u305f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5f93\u6765\u3088\u308a\u3082\u5c0f\u3055\u3044-Xmx\u5024\u3067\u5341\u5206\u306a\u5834\u5408\u304c\u591a\u304f\u306a\u308a\u307e\u3057\u305f\u3002<\/li>\n<\/div>\n\n\n<li>\u30ab\u30b9\u30bf\u30e0\u30e9\u30f3\u30bf\u30a4\u30e0\u30a4\u30e1\u30fc\u30b8\uff08jlink\u4f7f\u7528\uff09\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u3067\u3001\u3055\u3089\u306a\u308b\u6700\u9069\u5316\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-302\">\n<p>\u958b\u767a\u8005\u306e\u58f0\uff1a\u300c\u30e2\u30b8\u30e5\u30fc\u30eb\u30b7\u30b9\u30c6\u30e0\u306e\u5c0e\u5165\u306b\u3088\u308a\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8d77\u52d5\u6642\u9593\u304c\u5927\u5e45\u306b\u6539\u5584\u3055\u308c\u3001\u5fc5\u8981\u306a\u30e1\u30e2\u30ea\u3082\u6e1b\u5c11\u3057\u307e\u3057\u305f\u3002-Xmx\u306e\u8a2d\u5b9a\u5024\u3092\u898b\u76f4\u3059\u826f\u3044\u6a5f\u4f1a\u3068\u306a\u308a\u307e\u3057\u305f\u3002\u300d<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-303\">\n<h3 class=\"wp-block-heading\" id=\"i-45\">7.2 \u30b3\u30f3\u30c6\u30ca\u74b0\u5883\u3067\u306e-Xmx\u8a2d\u5b9a<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-304\">\n<p>\u30b3\u30f3\u30c6\u30ca\u6280\u8853\u306e\u666e\u53ca\u306b\u4f34\u3044\u3001JVM\u306e\u30e1\u30e2\u30ea\u7ba1\u7406\u3082\u5927\u304d\u304f\u5909\u5316\u3057\u3066\u3044\u307e\u3059\u3002\u7279\u306bJava 8u191\u4ee5\u964d\u3001\u30b3\u30f3\u30c6\u30ca\u74b0\u5883\u3067\u306e-Xmx\u8a2d\u5b9a\u306b\u95a2\u3059\u308b\u91cd\u8981\u306a\u6539\u5584\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-305\">\n<li>\u30b3\u30f3\u30c6\u30ca\u8a8d\u8b58\uff1a<code>-XX:+UseContainerSupport<\/code> \u30aa\u30d7\u30b7\u30e7\u30f3\u304c\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u6709\u52b9\u306b\u306a\u308a\u3001JVM\u304c\u30b3\u30f3\u30c6\u30ca\u306e\u30e1\u30e2\u30ea\u5236\u9650\u3092\u81ea\u52d5\u7684\u306b\u8a8d\u8b58\u3059\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-306\">\n<li>\u9069\u5207\u306a-Xmx\u8a2d\u5b9a\uff1a\u30b3\u30f3\u30c6\u30ca\u306e\u30e1\u30e2\u30ea\u5236\u9650\u306e70-80%\u7a0b\u5ea6\u3092-Xmx\u306b\u8a2d\u5b9a\u3057\u3001\u6b8b\u308a\u3092Metaspace\u3001\u30b9\u30ec\u30c3\u30c9\u30b9\u30bf\u30c3\u30af\u3001\u30cd\u30a4\u30c6\u30a3\u30d6\u30e1\u30e2\u30ea\u7528\u306b\u78ba\u4fdd\u3059\u308b\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/div><\/ul>\n\n\n<div id=\"sgb-css-id-307\">\n<p>\u8a2d\u5b9a\u4f8b\uff1a<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">docker run -m 1g myapp -e JAVA_TOOL_OPTIONS='-Xmx750m'<\/pre>\n\n\n<div id=\"sgb-css-id-309\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:#ffb36b;color:#FFF\" class=\"sgb-box-simple__title\">\u6ce8\u610f\u70b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:#ffb36b;background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-308\">\n<li>\u53e4\u3044Java\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u306f\u30b3\u30f3\u30c6\u30ca\u8a8d\u8b58\u6a5f\u80fd\u304c\u306a\u3044\u305f\u3081\u3001\u660e\u793a\u7684\u306a-Xmx\u8a2d\u5b9a\u304c\u5fc5\u8981\u3067\u3059\u3002<\/li>\n<\/div>\n\n\n<li>OOMKiller\u306b\u3088\u308b\u30b3\u30f3\u30c6\u30ca\u505c\u6b62\u306e\u30ea\u30b9\u30af\u304c\u3042\u308b\u305f\u3081\u3001\u9069\u5207\u306a\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u3068\u30ea\u30bd\u30fc\u30b9\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u304c\u91cd\u8981\u3067\u3059\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-310\">\n<p>\u958b\u767a\u8005\u306e\u58f0\uff1a\u300c\u30b3\u30f3\u30c6\u30ca\u74b0\u5883\u3067\u306e\u81ea\u52d5\u30e1\u30e2\u30ea\u7ba1\u7406\u306b\u3088\u308a\u3001\u904b\u7528\u8ca0\u8377\u304c\u5927\u5e45\u306b\u8efd\u6e1b\u3055\u308c\u307e\u3057\u305f\u3002\u305f\u3060\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u7279\u6027\u306b\u5fdc\u3058\u3066\u5fae\u8abf\u6574\u304c\u5fc5\u8981\u306a\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002\u300d<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-311\">\n<h3 class=\"wp-block-heading\" id=\"i-46\">7.3 \u30af\u30e9\u30a6\u30c9\u30cd\u30a4\u30c6\u30a3\u30d6\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u304a\u3051\u308b\u52d5\u7684\u30e1\u30e2\u30ea\u7ba1\u7406\u306e\u5c55\u671b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-312\">\n<p>\u30af\u30e9\u30a6\u30c9\u30cd\u30a4\u30c6\u30a3\u30d6\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u53f0\u982d\u306b\u3088\u308a\u3001\u30e1\u30e2\u30ea\u7ba1\u7406\u306e\u8003\u3048\u65b9\u3082\u9032\u5316\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<ol class=\"wp-block-list is-style-sango-list-simple\">\n<li>\u52d5\u7684\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u3068-Xmx\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-313\">\n<li>\u30ea\u30bd\u30fc\u30b9\u4f7f\u7528\u52b9\u7387\u3068\u8fc5\u901f\u306a\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u306e\u30d0\u30e9\u30f3\u30b9\u304c\u91cd\u8981<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-314\">\n<li>\u81ea\u52d5\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u306b\u9069\u3057\u305f-Xmx\u8a2d\u5b9a\u304c\u6c42\u3081\u3089\u308c\u308b<\/li>\n<\/div><\/ul>\n<\/li>\n\n\n\n<li>\u6700\u65b0\u306eGC\u6280\u8853\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-315\">\n<li>Shenandoah GC\uff1a\u4f4e\u505c\u6b62\u6642\u9593\u3092\u5b9f\u73fe<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-316\">\n<li>ZGC\uff1a\u5927\u898f\u6a21\u30d2\u30fc\u30d7\u3067\u3082\u4e00\u8cab\u3057\u305f\u4f4e\u30ec\u30a4\u30c6\u30f3\u30b7\u3092\u63d0\u4f9b \u3053\u308c\u3089\u306e\u65b0\u3057\u3044GC\u306b\u3088\u308a\u3001\u5927\u304d\u306a-Xmx\u5024\u3067\u3082\u9ad8\u3044\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u53ef\u80fd\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/div><\/ul>\n<\/li>\n\n\n\n<li>\u52b9\u7387\u7684\u306a\u30e1\u30e2\u30ea\u7ba1\u7406\u30a2\u30d7\u30ed\u30fc\u30c1\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-317\">\n<li>\u30b3\u30f3\u30c6\u30ca\u5bfe\u5fdcJVM\u306e\u6d3b\u7528<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-318\">\n<li>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30e1\u30c8\u30ea\u30af\u30b9\u306b\u57fa\u3065\u304f\u52d5\u7684\u306a\u30ea\u30bd\u30fc\u30b9\u5272\u308a\u5f53\u3066<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-319\">\n<li>\u30b5\u30fc\u30d0\u30fc\u30ec\u30b9\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306b\u3088\u308b\u81ea\u52d5\u7684\u306a\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406<\/li>\n<\/div><\/ul>\n<\/li>\n<\/ol>\n\n\n<div id=\"sgb-css-id-322\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u5c06\u6765\u306e\u5c55\u671b<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-320\">\n<li>AI\/ML\u306b\u3088\u308b\u81ea\u52d5\u7684\u306a-Xmx\u6700\u9069\u5316<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-321\">\n<li>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u7279\u6027\u306b\u57fa\u3065\u304f\u52d5\u7684\u306aGC\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u9078\u629e<\/li>\n<\/div>\n\n\n<li>-Xmx\u8a2d\u5b9a\u306e\u91cd\u8981\u6027\u304c\u4f4e\u4e0b\u3057\u3001JVM\u304c\u81ea\u52d5\u7684\u306b\u6700\u9069\u5316\u3059\u308b\u53ef\u80fd\u6027<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-325\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u95a2\u9023\u3059\u308bJEP\uff08Java Enhancement Proposal\uff09<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-323\">\n<li>JEP 261\uff1a Module System (Java 9)<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-324\">\n<li>JEP 318\uff1a Epsilon: A No-Op Garbage Collector (Java 11)<\/li>\n<\/div>\n\n\n<li>JEP 333\uff1a ZGC: A Scalable Low-Latency Garbage Collector (Experimental) (Java 11)<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-326\">\n<p>\u958b\u767a\u8005\u306e\u58f0\uff1a\u300c\u65b0\u3057\u3044GC\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306b\u3088\u308a\u3001\u5927\u898f\u6a21\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u304c\u683c\u6bb5\u306b\u5bb9\u6613\u306b\u306a\u308a\u307e\u3057\u305f\u3002-Xmx\u8a2d\u5b9a\u306f\u307e\u3060\u91cd\u8981\u3067\u3059\u304c\u3001\u305d\u306e\u91cd\u8981\u6027\u306f\u5f90\u3005\u306b\u4f4e\u4e0b\u3057\u3066\u3044\u304f\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u300d<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-327\">\n<h3 class=\"wp-block-heading\" 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