{"id":11129,"date":"2023-11-28T21:52:47","date_gmt":"2023-11-28T13:52:47","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=11129"},"modified":"2023-12-07T16:22:56","modified_gmt":"2023-12-07T08:22:56","slug":"jvm-diao-you-de-gong-ju-you-na-xie","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/jvm-diao-you-de-gong-ju-you-na-xie\/","title":{"rendered":"JVM\u8c03\u4f18\u7684\u5de5\u5177\u6709\u54ea\u4e9b\uff1f"},"content":{"rendered":"<p>\u5728Java\u865a\u62df\u673a\uff08JVM\uff09\u8c03\u4f18\u8fc7\u7a0b\u4e2d\uff0c\u6709\u8bb8\u591a\u5de5\u5177\u53ef\u4f9b\u4f7f\u7528\uff0c\u7528\u4e8e\u76d1\u63a7\u3001\u5206\u6790\u548c\u8bca\u65ad\u5e94\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u884c\u4e3a\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684JVM\u8c03\u4f18\u5de5\u5177\uff1a<\/p>\n<ol>\n<li>\n<strong>JVisualVM\uff1a<\/strong><\/p>\n<ul>\n<li>VisualVM \u662f\u4e00\u4e2a\u56fe\u5f62\u5316\u7684\u76d1\u63a7\u3001\u7ba1\u7406\u548c\u5206\u6790\u5de5\u5177\uff0c\u5305\u542b\u5728JDK\u4e2d\u3002\u5b83\u652f\u6301\u672c\u5730\u548c\u8fdc\u7a0b\u5e94\u7528\u7a0b\u5e8f\uff0c\u5e76\u63d0\u4f9b\u5806\u5feb\u7167\u3001\u7ebf\u7a0b\u5206\u6790\u3001\u5783\u573e\u56de\u6536\u5206\u6790\u7b49\u529f\u80fd\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>JConsole\uff1a<\/strong><\/p>\n<ul>\n<li>JConsole \u662f JDK \u81ea\u5e26\u7684\u76d1\u63a7\u5de5\u5177\uff0c\u63d0\u4f9b\u4e86\u4e00\u4e9b\u57fa\u672c\u7684\u76d1\u63a7\u548c\u7ba1\u7406\u529f\u80fd\u3002\u5b83\u53ef\u4ee5\u5b9e\u65f6\u76d1\u63a7\u5e94\u7528\u7a0b\u5e8f\u7684 CPU \u4f7f\u7528\u7387\u3001\u5806\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\u3001\u7ebf\u7a0b\u4fe1\u606f\u7b49\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>jstat\uff1a<\/strong><\/p>\n<ul>\n<li>jstat \u662f\u7528\u4e8e\u76d1\u89c6\u7edf\u8ba1\u4fe1\u606f\u7684\u547d\u4ee4\u884c\u5de5\u5177\uff0c\u53ef\u4ee5\u67e5\u770b\u5806\u5185\u5b58\u3001\u5783\u573e\u56de\u6536\u3001\u7c7b\u52a0\u8f7d\u7b49\u65b9\u9762\u7684\u7edf\u8ba1\u6570\u636e\u3002\u4f8b\u5982\uff0c<code>jstat -gc &lt;pid&gt;<\/code> \u53ef\u4ee5\u663e\u793a\u5783\u573e\u56de\u6536\u76f8\u5173\u7684\u7edf\u8ba1\u4fe1\u606f\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>jmap\uff1a<\/strong><\/p>\n<ul>\n<li>jmap \u662f\u7528\u4e8e\u751f\u6210\u5806\u5185\u5b58\u8f6c\u50a8\u5feb\u7167\uff08heap dump\uff09\u7684\u5de5\u5177\u3002\u901a\u8fc7<code>jmap -dump:format=b,file=&lt;filename&gt; 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