{"id":31331,"date":"2023-08-14T10:29:15","date_gmt":"2023-04-29T16:42:17","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%8ajava%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e3%80%8b%e7%ac%ac%e4%b8%89%e7%ab%a0%ef%bc%9ajava%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e5%b7%a5%e5%85%b7%e9%9b%86\/"},"modified":"2025-08-12T23:29:05","modified_gmt":"2025-08-12T15:29:05","slug":"%e3%80%8ajava%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e3%80%8b%e7%ac%ac%e4%b8%89%e7%ab%a0%ef%bc%9ajava%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e5%b7%a5%e5%85%b7%e9%9b%86","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%8ajava%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e3%80%8b%e7%ac%ac%e4%b8%89%e7%ab%a0%ef%bc%9ajava%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e5%b7%a5%e5%85%b7%e9%9b%86\/","title":{"rendered":"\u300aJava\u6027\u80fd\u4f18\u5316\u300b\u7b2c\u4e09\u7ae0\uff1aJava\u6027\u80fd\u4f18\u5316\u5de5\u5177\u96c6"},"content":{"rendered":"<p>O&#8217;Reilly Japan &#8211; Java\u6027\u80fd<br \/>\n\u8fd9\u672c\u4e66\u7684\u7b2c\u4e09\u7ae0\u603b\u7ed3<\/p>\n<p>1\u7bc7\u4ecb\u7ecd &#8211; Qiita<br \/>\n2\u7bc7\u6027\u80fd\u6d4b\u8bd5\u65b9\u6cd5 &#8211; Qiita \u2190\u4e0a\u7bc7\u6587\u7ae0<br \/>\n3\u7bc7Java\u6027\u80fd\u5de5\u5177\u7bb1 &#8211; Qiita \u2190\u672c\u7bc7\u6587\u7ae0<br \/>\n4\u7bc7JIT\u7f16\u8bd1\u5668\u7684\u539f\u7406 &#8211; Qiita \u2190\u4e0b\u7bc7\u6587\u7ae0<br \/>\n5\u7bc7\u5783\u573e\u6536\u96c6\u7684\u57fa\u7840 &#8211; Qiita<\/p>\n<h1>3.1 \u914d\u5907\u5728\u64cd\u4f5c\u7cfb\u7edf\u4e2d\u7684\u5de5\u5177\u548c\u5206\u6790<\/h1>\n<p>\u6700\u521d\u4f7f\u7528\u7684\u5de5\u5177\u4e0eJava\u65e0\u5173\u3002<\/p>\n<p>\u5728\u57fa\u4e8eUnix\u7684\u7cfb\u7edf\u4e2d\uff0c\u62e5\u6709sar\u547d\u4ee4\u3001vmstat\u3001iostat\u548cprstat\uff0c\u800c\u5728Windows\u7cfb\u7edf\u4e2d\u5219\u6709\u4e00\u4e2a\u540d\u4e3atypeperf\u7684\u5de5\u5177\u3002<\/p>\n<h2>CPU\u4f7f\u7528\u7387<\/h2>\n<p>CPU\u4f7f\u7528\u7387\u53ef\u4ee5\u5206\u4e3a\u4ee5\u4e0b\u4e24\u7c7b\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30e6\u30fc\u30b6\u30fc\u6642\u9593: CPU\u304c\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\u6642\u9593<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30b7\u30b9\u30c6\u30e0\u6642\u9593: CPU\u304cOS\u306e\u30ab\u30fc\u30cd\u30eb\u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\u6642\u9593<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u30b7\u30b9\u30c6\u30e0\u6642\u9593\u306f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3068\u7121\u95a2\u4fc2\u3067\u306f\u306a\u3044\u3002\u30c7\u30a3\u30b9\u30af\u3078\u66f8\u304d\u8fbc\u307f\u3092\u884c\u3063\u305f\u308a\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3078\u8ee2\u9001\u3057\u305f\u308a\u306a\u3069\u3068\u3044\u3063\u305f\u3053\u3068\u3092\u3057\u3066\u3044\u307e\u3059\u3002<\/ul>\n<p>\u203b\u5728Windows\u64cd\u4f5c\u7cfb\u7edf\u4e2d\uff0c\u7cfb\u7edf\u65f6\u95f4\u88ab\u79f0\u4e3a\u7279\u6743\u65f6\u95f4\u3002<\/p>\n<p>\u76ee\u6807\u662f\u5c3d\u53ef\u80fd\u63d0\u9ad8\u5904\u7406\u5668\u4f7f\u7528\u7387\u5e76\u7f29\u77ed\u6267\u884c\u65f6\u95f4\u3002<\/p>\n<p>CPU\u5904\u4e8e\u7a7a\u95f2\u72b6\u6001\u7684\u539f\u56e0<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u540c\u671f\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u3067\u30ed\u30c3\u30af\u306e\u958b\u653e\u5f85\u3061<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u4f55\u304b\u3092(\u4f8b\u3048\u3070\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u306e\u30ec\u30b9\u30dd\u30f3\u30b9)\u3092\u5f85\u3063\u3066\u3044\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u884c\u3046\u3079\u304d\u51e6\u7406\u304c\u7121\u3044\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u3068\u3044\u3063\u305f\u3053\u3068\u304c\u8003\u3048\u3089\u308c\u308b\u3002<\/ul>\n<p>\u6709\u65f6\u5019\uff0c\u6211\u4eec\u4e5f\u53ef\u80fd\u5e0c\u671b\u9650\u5236\u6bcf\u4e2a\u7a0b\u5e8f\u7684CPU\u4f7f\u7528\u7387\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u53ef\u4ee5\u5f3a\u5236\u5c06CPU\u5468\u671f\u8bbe\u7f6e\u4e3a\u4e00\u5b9a\u7684\u7a7a\u95f2\u72b6\u6001\uff0c\u6216\u8005\u964d\u4f4e\u7a0b\u5e8f\u7684\u4f18\u5148\u7ea7\u7b49\u3002<\/p>\n<h2>\u4e2d\u592e\u5904\u7406\u5668\u7684\u961f\u5217<\/h2>\n<p>Windows\u548cUnix\u7cfb\u7edf\u90fd\u6709\u4e00\u79cd\u673a\u5236\u6765\u76d1\u89c6\u53ef\u6267\u884c\u7684\uff08\u4e0d\u5904\u4e8e\u8f93\u5165\u8f93\u51fa\u7b49\u5f85\u6216\u4f11\u7720\u72b6\u6001\u7684\uff09\u7ebf\u7a0b\u3002\u8fd9\u4e2a\u673a\u5236\u88ab\u79f0\u4e3a\u8fd0\u884c\u961f\u5217\uff08run queue\uff09\u3002<br \/>\n\u5728Windows\u4e2d\u88ab\u79f0\u4e3a\u5904\u7406\u5668\u961f\u5217\uff0c\u53ef\u4ee5\u901a\u8fc7typeperf\u547d\u4ee4\u67e5\u770b\u3002<\/p>\n<pre class=\"post-pre\"><code>C:&gt; typeperf -si 1 \"\\System\\Processor Queue Length\"\r\n\"05\/11\/2013 19:09:42.678\",\"0.000000\"\r\n\"05\/11\/2013 19:09:43.678\",\"0.000000\"\r\n<\/code><\/pre>\n<p>\u7531\u4e8e\u30e9\u30f3\u30ad\u30e5\u30fc\u4e2d\u5305\u542b\u4e86\u5f53\u524d\u6b63\u5728\u8fd0\u884c\u7684\u9879\u76ee\uff0c\u56e0\u6b64\u5b83\u80af\u5b9a\u662f1\u6216\u66f4\u591a\u3002<br \/>\n\u53e6\u4e00\u65b9\u9762\uff0cWindows\u7684\u5904\u7406\u5668\u961f\u5217\u4e0d\u5305\u62ec\u5f53\u524d\u6b63\u5728\u8fd0\u884c\u7684\u9879\u76ee\uff0c\u56e0\u6b64\u5b83\u662f0\u6216\u66f4\u591a\u3002<\/p>\n<p>\u5f53\u6267\u884c\u7684\u7ebf\u7a0b\u6570\u91cf\u8d85\u8fc7CPU\u6570\u91cf\u65f6\uff0c\u6027\u80fd\u4f1a\u4e0b\u964d\u3002<br \/>\n\u5728Unix\u7cfb\u7edf\u4e2d\uff0c\u5e0c\u671b\u961f\u5217\u7684\u6570\u91cf\u7b49\u4e8eCPU\u7684\u6570\u91cf\uff0c\u800c\u5728Windows\u7cfb\u7edf\u4e2d\uff0c\u5e0c\u671b\u5904\u7406\u5668\u961f\u5217\u7684\u957f\u5ea6\u4e3a0\u3002<br \/>\n\u7136\u800c\uff0c\u8fd9\u4e0d\u662f\u7edd\u5bf9\u7684\u539f\u5219\u3002<br \/>\n\u53ea\u8981\u961f\u5217\u7684\u957f\u5ea6\u5076\u5c14\u589e\u52a0\uff0c\u5c31\u6ca1\u6709\u95ee\u9898\u3002<br \/>\n\u53e6\u4e00\u65b9\u9762\uff0c\u5982\u679c\u961f\u5217\u8fc7\u957f\u6301\u7eed\u5b58\u5728\uff0c\u4f1a\u589e\u52a0\u673a\u5668\u7684\u8d1f\u8f7d\u3002\u9700\u8981\u5c06\u5904\u7406\u5206\u5e03\u5230\u53e6\u4e00\u53f0\u673a\u5668\u4e0a\u6216\u8005\u4f18\u5316\u4ee3\u7801\u3002<\/p>\n<h2>\u78c1\u76d8\u4f7f\u7528\u7387<\/h2>\n<p>\u786e\u8ba4\u95ee\u9898\u7684\u63d0\u793a\u3002<br \/>\n\u4f8b\u5982\uff0c\u5982\u679ciostat -x\u7684wMB\/s\uff08\u6bcf\u79d2\u5199\u5165\u5b57\u8282\u6570\uff09\u8f83\u4f4e\uff0c\u4f46w\/s\uff08\u6bcf\u79d2\u5199\u5165\u6b21\u6570\uff09\u8f83\u9ad8\uff0c\u5219\u53ef\u80fd\u63d0\u9ad8\u6027\u80fd\u4f7f\u7528\u6279\u91cf\u5199\u5165\u5904\u7406\u3002<br \/>\n\u53cd\u8fc7\u6765\uff0c\u5982\u679c\u5199\u5165\u592a\u591a\uff0c\u5219\u53ef\u4ee5\u786e\u5b9a\u90a3\u91cc\u6210\u4e3a\u74f6\u9888\u3002<\/p>\n<p>\u53ef\u4ee5\u901a\u8fc7\u67e5\u770b\u7cfb\u7edf\u662f\u5426\u8fdb\u884c\u4e86\u4ea4\u6362\u6765\u5224\u65ad\u3002\u8fd9\u53ef\u80fd\u4f1a\u5bf9\u6027\u80fd\u4ea7\u751f\u5f71\u54cd\u3002<br \/>\n\u5728vmstat\u4e2d\uff0c\u53ef\u4ee5\u770b\u5230si\uff08\u4ea4\u6362\u5165\uff09\u548cso\uff08\u4ea4\u6362\u51fa\uff09\u3002<\/p>\n<h2>\u7f51\u7edc\u4f7f\u7528\u7387<\/h2>\n<p>\u5728\u4e2d\u6587\u4e2d\uff0c\u7f51\u7edc\u6d41\u91cf\u76d1\u63a7\u901a\u5e38\u9700\u8981\u4f7f\u7528\u4e13\u95e8\u7684\u5de5\u5177\uff0c\u6807\u51c6\u7684\u7cfb\u7edf\u5de5\u5177\u5f80\u5f80\u65e0\u6cd5\u6ee1\u8db3\u8981\u6c42\u3002\u5728Unix\u7cfb\u7edf\u4e2d\uff0c\u901a\u5e38\u4f7f\u7528netstat\u8fdb\u884c\u76d1\u63a7\uff0c\u800c\u5728Windows\u7cfb\u7edf\u4e2d\uff0c\u5219\u4f7f\u7528typeperf\u3002<\/p>\n<p>\u5728Unix\u7cfb\u7d71\u4e2d\uff0cnicstat\u88ab\u7528\u4f86\u6e2c\u91cf\u7db2\u7d61\u5e36\u5bec\u3002<\/p>\n<h1>3.2 Java \u76d1\u63a7\u5de5\u5177<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">jcmd: \u6307\u5b9a\u3057\u305f\u30d7\u30ed\u30bb\u30b9\u306b\u3064\u3044\u3066\u306e\u60c5\u5831\u304c\u51fa\u3066\u304f\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">jconsole: GUI\u3067JVM\u306e\u52d5\u304d\u3092\u898b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">jhat: Web\u30d6\u30e9\u30a6\u30b6\u3067\u30d2\u30fc\u30d7\u30c0\u30f3\u30d7\u3092\u30d6\u30e9\u30a6\u30ba\u3067\u304d\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">jmap: \u30d2\u30fc\u30d7\u30c0\u30f3\u30d7\u3001\u30e1\u30e2\u30ea\u306e\u60c5\u5831\u3092\u53d6\u5f97\u3067\u304d\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">jinfo: JVM\u306e\u30b7\u30b9\u30c6\u30e0\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u8868\u793a\u3067\u304d\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">jstack: Java\u30d7\u30ed\u30bb\u30b9\u306e\u30b9\u30bf\u30c3\u30af\u3092\u30c0\u30f3\u30d7\u3059\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">jstat: GC\u3084\u30af\u30e9\u30b9\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\u306b\u3064\u3044\u3066\u306e\u60c5\u5831\u3092\u8868\u793a\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">jvisualvm: JVM\u306e\u76e3\u8996\u3002\u30d2\u30fc\u30d7\u30c0\u30f3\u30d7\u306e\u89e3\u6790\u304c\u3067\u304d\u308b\u3002<\/ul>\n<h2>Java\u865a\u62df\u673a\uff08JVM\uff09\u7684\u57fa\u672c\u4fe1\u606f\u3002<\/h2>\n<h3>\u6267\u884c\u65f6\u95f4<\/h3>\n<pre class=\"post-pre\"><code>jcmd ${\u30d7\u30ed\u30bb\u30b9ID} VM.uptime\r\n<\/code><\/pre>\n<h3>\u7cfb\u7edf\u5c5e\u6027<\/h3>\n<p>\u53ef\u4ee5\u770b\u5230\u4e0eSystem.getProperties()\u83b7\u53d6\u7684\u503c\u76f8\u540c\u7684\u503c\uff08\u7531-Dhogehoge\u6307\u5b9a\u5728\u542f\u52a8\u65f6\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code>jcmd ${\u30d7\u30ed\u30bb\u30b9ID} VM.system_properties\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>jinfo -sysprops ${\u30d7\u30ed\u30bb\u30b9ID}\r\n<\/code><\/pre>\n<h3>JVM \u7248\u672c<\/h3>\n<pre class=\"post-pre\"><code>jcmd ${\u30d7\u30ed\u30bb\u30b9ID} VM.version\r\n<\/code><\/pre>\n<h3>JVM \u7684\u547d\u4ee4\u884c\u53c2\u6570<\/h3>\n<pre class=\"post-pre\"><code>jcmd ${\u30d7\u30ed\u30bb\u30b9ID} VM.command_line\r\n<\/code><\/pre>\n<h3>JVM\u8c03\u4f18\u6807\u5fd7<\/h3>\n<pre class=\"post-pre\"><code>jcmd ${\u30d7\u30ed\u30bb\u30b9ID} VM.flags -all\r\n<\/code><\/pre>\n<p>\u5982\u679c\u53bb\u6389&#8221;all&#8221;\uff0c\u5269\u4e0b\u7684\u662f\u6307\u5b9a\u7684\u90a3\u4e9b\u5417\uff1f<\/p>\n<h3>\u5c55\u793a\u5e73\u53f0\u7279\u5b9a\u7684\u9ed8\u8ba4\u503c<\/h3>\n<pre class=\"post-pre\"><code>java -XX:+PrintFlagsFinal -version\r\n<\/code><\/pre>\n<p>:=\u662f\u6307\u5b9a\u4e86\u9664\u9ed8\u8ba4\u503c\u4ee5\u5916\u7684\u503c\u3002<\/p>\n<h3>\u66f4\u6539\u6807\u8bb0\u7684\u52a8\u6001\u503c<\/h3>\n<p>\u9996\u5148\uff0c\u60a8\u53ef\u4ee5\u67e5\u770b\u4e0b\u65b9\u8bbe\u7f6e\u7684\u6240\u6709\u6570\u503c\u3002<\/p>\n<pre class=\"post-pre\"><code>jinfo -flags ${\u30d7\u30ed\u30bb\u30b9ID}\r\n<\/code><\/pre>\n<p>\u5982\u679c\u60a8\u60f3\u6309\u8bbe\u7f6e\u9879\u76ee\u6765\u67e5\u770b\u7684\u8bdd<\/p>\n<pre class=\"post-pre\"><code>jinfo -flag PrintGCDetails ${\u30d7\u30ed\u30bb\u30b9ID}\r\n<\/code><\/pre>\n<p>\u66f4\u6539\u8a2d\u5b9a\u503c\u6642<\/p>\n<pre class=\"post-pre\"><code>jinfo -flag -PrintGCDetails ${\u30d7\u30ed\u30bb\u30b9ID}\r\njinfo -flag PrintGCDetails ${\u30d7\u30ed\u30bb\u30b9ID}\r\n<\/code><\/pre>\n<h2>\u7ebf\u7a0b\u7684\u4fe1\u606f<\/h2>\n<p>\u53ef\u4ee5\u4f7f\u7528jconsole\u6216jvisualvm\u5728GUI\u754c\u9762\u4e0a\u67e5\u770b\u6b63\u5728\u8fd0\u884c\u7684\u7ebf\u7a0b\u6570\u3002<\/p>\n<p>\u7ebf\u7a0b\u5806\u6808\u663e\u793a\u65b9\u5f0f<\/p>\n<pre class=\"post-pre\"><code>jstack ${\u30d7\u30ed\u30bb\u30b9ID}\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>jcmd ${\u30d7\u30ed\u30bb\u30b9ID} Thread.print\r\n<\/code><\/pre>\n<h2>\u73ed\u7ea7\u7684\u8d44\u8baf de<\/h2>\n<p>\u4f7f\u7528jconsole\u6216jstat\u3002<br \/>\n\u5728jstat\u4e2d\u8fd8\u53ef\u4ee5\u83b7\u5f97\u6709\u5173\u7f16\u8bd1\u7684\u4fe1\u606f\u3002<\/p>\n<h2>\u5783\u573e\u6536\u96c6\u7684\u52a8\u6001\u5206\u6790<\/h2>\n<p>\u5728jconsole\u4e2d\uff0c\u53ef\u4ee5\u7528\u56fe\u5f62\u663e\u793a\u5806\u5185\u5b58\u7684\u4f7f\u7528\u7387\u3002<br \/>\n\u5728jcmd\u4e2d\u53ef\u4ee5\u6267\u884cGC\u64cd\u4f5c\uff08\u7c7b\u4f3c\u4e8ejconsole\u7684\u529f\u80fd\u5417\uff1f\uff09\u3002<br \/>\n\u901a\u8fc7jmap\u53ef\u4ee5\u67e5\u770b\u5806\u5185\u5b58\u7684\u603b\u89c8\u4fe1\u606f\u3002<br \/>\njstat\u63d0\u4f9b\u4e86\u591a\u79cd\u89c6\u56fe\u6765\u663e\u793aGC\u64cd\u4f5c\u7684\u76f8\u5173\u60c5\u51b5\u3002<\/p>\n<h2>\u5806\u6808\u8f6c\u50a8\u7684\u540e\u7eed\u5206\u6790<\/h2>\n<p>\u53ef\u4ee5\u4f7f\u7528jvisualvm(GUI\u5de5\u5177)\u3001jcmd\u6216jmap\u6765\u83b7\u53d6\u3002<br \/>\n\u4f7f\u7528\u6807\u51c6\u5de5\u5177\u53ef\u4ee5\u4f7f\u7528jvisualvm\u6216jhat\u8fdb\u884c\u5206\u6790\u3002<br \/>\n\u8fd8\u6709\u4e00\u4e2a\u540d\u4e3aEclipse Memory Analyzer Tool\u7684\u7b2c\u4e09\u65b9\u5de5\u5177\u53ef\u4f9b\u4f7f\u7528\u3002<\/p>\n<h1>3.3\u6027\u80fd\u4f18\u5316\u5de5\u5177<\/h1>\n<h2>\u91c7\u6837\u7c7b\u578b\u7684\u6027\u80fd\u5206\u6790\u5668<\/h2>\n<p>\u6709\u4e24\u79cd\u6a21\u5f0f\uff0c\u5373\u62bd\u6837\u6a21\u5f0f\u548c\u4eea\u5668\u5316\u6a21\u5f0f\u3002<br \/>\n\u62bd\u6837\u6a21\u5f0f\u7684\u5f00\u9500\u6700\u5c0f\uff0c\u53ef\u4ee5\u5c3d\u53ef\u80fd\u51cf\u5c11\u6027\u80fd\u7279\u6027\u7684\u6539\u53d8\uff0c\u4ee5\u9632\u6b62\u6027\u80fd\u5206\u6790\u5668\u7684\u5e72\u6270\u3002<\/p>\n<p>\u7136\u800c\uff0c\u8bb8\u591a\u91c7\u6837\u578b\u7684\u6027\u80fd\u5206\u6790\u5de5\u5177\u90fd\u4e0d\u591f\u7cbe\u786e\u3002\u4f8b\u5982\uff0c\u5b9a\u671f\u901a\u8fc7\u5b9a\u65f6\u5668\u8c03\u7528\u7684\u5de5\u5177\u53ea\u80fd\u611f\u77e5\u5230\u5728\u5b9a\u65f6\u5668\u89e6\u53d1\u65f6\u6267\u884c\u7684\u7ebf\u7a0b\u4ea7\u751f\u7684\u4e8b\u4ef6\u7b49\u3002<\/p>\n<p>\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u51fa\u73b0\u5728\u5256\u6790\u7ed3\u679c\u524d\u9762\u7684\u65b9\u6cd5\u4ec5\u5360\u636e\u4e862-3\uff05\uff0c\u6240\u4ee5\u5373\u4f7f\u6211\u4eec\u52aa\u529b\u5c06\u5176\u52a0\u500d\u63d0\u901f\uff0c\u4e5f\u53ea\u80fd\u5b9e\u73b01\uff05\u7684\u4f18\u5316\u3002<\/p>\n<h2>\u5177\u6709\u68c0\u6d4b\u529f\u80fd\u7684\u6027\u80fd\u5206\u6790\u5668<\/h2>\n<p>\u4e0d\u540c\u4e8e\u91c7\u6837\u578b\uff0c\u8fd8\u53ef\u4ee5\u67e5\u770b\u6bcf\u4e2a\u65b9\u6cd5\u7684\u8c03\u7528\u6b21\u6570\uff0c\u4ee5\u53ca\u6bcf\u79d2\u5e73\u5747\u8c03\u7528\u6b21\u6570\u7b49\u3002<br \/>\n\u901a\u8fc7\u8fd9\u6837\u505a\uff0c\u4f8b\u5982\u53ef\u4ee5\u77e5\u9053\u662f\u5426\u9700\u8981\u52a0\u5feb\u5b9e\u73b0\u901f\u5ea6\uff0c\u6216\u8005\u6539\u8fdb\u4ee5\u51cf\u5c11\u6267\u884c\u6b21\u6570\u7b49\u3002<\/p>\n<p>instrumented\u6a21\u5f0f\u4e0b\u7684\u6027\u80fd\u5206\u6790\u5668\u4f1a\u901a\u8fc7\u4fee\u6539\u5b57\u8282\u7801\u6765\u5b9e\u65bd\u8bf8\u5982\u8ba1\u7b97\u8c03\u7528\u6b21\u6570\u7b49\u7684\u4ee3\u7801\uff0c\u56e0\u6b64\u5728\u6027\u80fd\u65b9\u9762\u53ef\u80fd\u4f1a\u5b58\u5728\u4e0d\u51c6\u786e\u7684\u60c5\u51b5\u3002<br \/>\n\u4f8b\u5982\uff0c\u65b9\u6cd5\u7684\u4ee3\u7801\u5927\u5c0f\u589e\u52a0\u53ef\u80fd\u4f1a\u5bfc\u81f4\u88ab\u5224\u65ad\u4e3a\u4e0d\u9700\u8981\u5185\u8054\u5316\uff08\u5728\u7b2c\u56db\u7ae0\u4f1a\u6709\u8be6\u7ec6\u8bf4\u660e\uff09\u3002<\/p>\n<p>\u91c7\u6837\u578b\u5206\u6790\u5668\u53ea\u80fd\u5bf9\u5904\u4e8e\u5b89\u5168\u70b9\uff08\u88ab\u5206\u914d\u5185\u5b58\u7684\u72b6\u6001\uff09\u7684\u7ebf\u7a0b\u8fdb\u884c\u5206\u6790\uff0c\u800c\u4eea\u5668\u6a21\u5f0f\u7684\u5206\u6790\u5668\u53ef\u4ee5\u5bf9\u5176\u8fdb\u884c\u5206\u6790\u3002<\/p>\n<h2>\u88ab\u963b\u6b62\u7684\u65b9\u6cd5\u548c\u7ebf\u7a0b\u7684\u65f6\u95f4\u7ebf<\/h2>\n<p>\u963b\u585e\u65b9\u6cd5\uff08\u5982LockSupport\uff03park\u6216Object\uff03wait\uff08\uff09\u7b49\u5f85\u7684\u65b9\u6cd5\uff09\u4e0d\u6d88\u8017CPU\u65f6\u95f4\uff08\u4e0d\u589e\u52a0CPU\u4f7f\u7528\u7387\uff09\uff0c\u56e0\u6b64\u5373\u4f7f\u5b83\u4eec\u5728\u6027\u80fd\u5206\u6790\u7ed3\u679c\u4e2d\u6392\u540d\u9760\u524d\uff0c\u4e5f\u65e0\u6cd5\u8fdb\u884c\u4f18\u5316\u3002<br \/>\n\u56e0\u6b64\uff0c\u5927\u591a\u6570\u6027\u80fd\u5206\u6790\u5668\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u4e0d\u4f1a\u663e\u793a\u88ab\u963b\u585e\u7684\u65b9\u6cd5\u3002<\/p>\n<p>\u5173\u4e8e\u88ab\u963b\u585e\u7684\u65b9\u6cd5\uff0c\u67e5\u770b\u7ebf\u7a0b\u7684\u6267\u884c\u72b6\u6001\u53ef\u4ee5\u4e86\u89e3\u5176\u8fd0\u884c\u60c5\u51b5\u3002\u5982\u679c\u4f7f\u7528VisualVM\uff0c\u5219\u53ef\u4ee5\u67e5\u770bThreads\u9009\u9879\u5361\u3002<\/p>\n<h2>\u6bcd\u8bed\u4e3a\u4e2d\u56fd\u7684\u4e13\u4e1a\u4eba\u58eb\uff08Native Chinese Speaker\uff09<\/h2>\n<p>\u4f7f\u7528\u672c\u5730\u914d\u7f6e\u6587\u4ef6\uff0c\u53ef\u4ee5\u5bf9JVM\u672c\u8eab\u8fdb\u884c\u914d\u7f6e\u3002<\/p>\n<p>\u5728\u4e2d\u6587\u4e2d\uff0c\u6709\u4e00\u4e2a\u540d\u4e3a&#8221;Oracle Solaris Studio&#8221;\u7684\u672c\u5730\u5316\u6027\u80fd\u5206\u6790\u5de5\u5177\u3002\u867d\u7136\u5b83\u7684\u540d\u79f0\u4e2d\u5e26\u6709&#8221;Solaris&#8221;\uff0c\u4f46\u5b83\u4e5f\u53ef\u4ee5\u5728Linux\u4e0a\u8fd0\u884c\u3002<\/p>\n<blockquote><p>\u5982\u679c\u5728Solaris\u4e0a\u8fd0\u884c\uff0c\u53ef\u4ee5\u5229\u7528Solaris\u5185\u6838\u7684\u5185\u90e8\u7ed3\u6784\u6765\u83b7\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p><\/blockquote>\n<p>\u6709\u63d0\u5230\u8fd9\u6837\u7684\u63cf\u8ff0\u3002\u7531\u4e8e\u6211\u6ca1\u6709Solaris\u673a\u5668\uff0c\u6240\u4ee5\u65e0\u6cd5\u5c1d\u8bd5\u3002<\/p>\n<p>\u5728\u4f7f\u7528\u672c\u5730\u5de5\u5177\u65f6\u80fd\u83b7\u5f97\u7684\u6570\u636e\u5305\u62ec\u5783\u573e\u56de\u6536\u6240\u82b1\u8d39\u7684\u65f6\u95f4\u7b49\u3002<\/p>\n<h1>3.4 Java\u4efb\u52a1\u63a7\u5236\u4e2d\u5fc3<\/h1>\n<p>\u5546\u7528\u7248\u672c\u7684Java\u4e2d\uff0c\u4ee5\u540d\u4e3ajmc\u7684\u5f62\u5f0f\u63d0\u4f9b\uff0c\u4e0d\u5305\u542b\u5728\u5f00\u6e90\u7248\u672c\u4e2d\u3002\u8981\u4f7f\u7528\u5b83\uff0c\u9700\u8981\u5546\u7528\u8bb8\u53ef\u8bc1\u3002<\/p>\n<h2>JFR\u53ef\u4ee5\u88ab\u6539\u4e3a\uff1a\u8bf7\u7ed9\u4e88\u60a8\u7684\u53cd\u9988\u3002<\/h2>\n<p>JMC\u7684\u5173\u952e\u529f\u80fd\u662fJFR\uff08Java Flight Recorder\uff09\u529f\u80fd\uff0c\u5b83\u53ef\u4ee5\u4e86\u89e3\u7ebf\u7a0b\u662f\u5426\u963b\u585e\u548c\u5176\u4ed6\u4e8b\u4ef6\u3002<\/p>\n<p>\u53ef\u4ee5\u5728JFR\u7684\u5185\u5b58\u89c6\u56fe\u4e2d\u770b\u5230\u4e0e\u5783\u573e\u6536\u96c6\u6709\u5173\u7684\u4e8b\u4ef6\u3002\u5728\u7b2c5\u7ae0\u548c\u7b2c6\u7ae0\u4e2d\uff0c\u5efa\u8bae\u5728\u9605\u8bfb\u65f6\u6ce8\u610f\u8fd9\u4e2a\u5de5\u5177\u7684\u4f5c\u7528\u3002<\/p>\n<p>\u5728JFR\u7684Code\u89c6\u56fe\u7684Overview\u6807\u7b7e\u4e0b\uff0c\u53ef\u4ee5\u770b\u5230\u6309\u5305\u540d\u6c47\u603b\u7684\u503c\u3002\u8fd9\u4e2a\u529f\u80fd\u975e\u5e38\u7f55\u89c1\u3002<\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u51c6\u786e\u5730\u83b7\u53d6\u6709\u5173\u9501\u81a8\u80c0\u7684\u4fe1\u606f\u3002<br \/>\n\u9664\u6b64\u4e4b\u5916\uff0c\u8fd8\u53ef\u4ee5\u83b7\u53d6\u65e0\u6cd5\u901a\u8fc7jcmd\u6216jconsole\u83b7\u53d6\u7684\u4fe1\u606f\u3002<br \/>\n\u203b \u6b63\u5982\u7b2c9\u7ae0\u4e2d\u6240\u89e3\u91ca\u7684\uff0c\u8981\u83b7\u53d6\u4e00\u4e2a\u9501\uff0c\u9700\u8981\u5728\u4e00\u4e2a\u7b80\u5355\u7684\u5faa\u73af\u4e2d\u7b49\u5f85\uff08\u79f0\u4e3a\u81ea\u65cb\uff09\uff0c\u5e76\u4f7f\u7528\u7279\u5b9a\u4e8eCPU\u548c\u64cd\u4f5c\u7cfb\u7edf\u7684\u4ee3\u7801\u6765\u83b7\u53d6\u9501\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u88ab\u79f0\u4e3a\u9501\u81a8\u80c0\u3002<\/p>\n<h3>\u542f\u7528JFR<\/h3>\n<p>\u8981\u542f\u7528\uff0c\u8bf7\u5728\u542f\u52a8\u5e94\u7528\u7a0b\u5e8f\u7684\u547d\u4ee4\u884c\u4e2d\u9644\u52a0\u4ee5\u4e0b\u6807\u5fd7\uff1a<br \/>\n-XX:+UnlockCommercialFeatures<br \/>\n-XX:+FlightRecorder<\/p>\n<p>JFR\u53ef\u4ee5\u4f7f\u7528\u4e24\u79cd\u8bb0\u5f55\u65b9\u6cd5\u3002<br \/>\n\u53ef\u4ee5\u9009\u62e9\u56fa\u5b9a\u65f6\u95f4\u6bb5\u7684\u79bb\u6563\u8bb0\u5f55\uff0c\u6216\u8005\u8fde\u7eed\u8bb0\u5f55\uff0c\u8fde\u7eed\u8bb0\u5f55\u65f6\u4f7f\u7528\u73af\u5f62\u7f13\u51b2\u533a\u3002<\/p>\n<p>\u53ef\u4ee5\u4f7f\u7528&#8221;-XX:+FlightRecorderOptions=${\u53c2\u6570\u5b57\u7b26\u4e32}&#8221;\u6765\u6307\u5b9a\u5982\u4f55\u8bb0\u5f55\u3002\u8fd9\u91cc\u6709\u53ef\u7528\u7684\u9009\u9879\u3002<\/p>\n<p>\u5373\u4f7f\u5bf9\u4e8e\u6b63\u5728\u8fd0\u884c\u7684JVM\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u8fdb\u884c\u8bbe\u7f6e\uff08\u9700\u8981\u9884\u5148\u6307\u5b9a-XX:+FlightRecorder\u9009\u9879\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code>jcmd ${\u30d7\u30ed\u30bb\u30b9ID} JFR.start [ \u30aa\u30d7\u30b7\u30e7\u30f3 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[&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-31331","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u300aJava\u6027\u80fd\u4f18\u5316\u300b\u7b2c\u4e09\u7ae0\uff1aJava\u6027\u80fd\u4f18\u5316\u5de5\u5177\u96c6 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u300aJava\u6027\u80fd\u4f18\u5316\u300b\u7b2c\u4e09\u7ae0\uff1aJava\u6027\u80fd\u4f18\u5316\u5de5\u5177\u96c6\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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