{"id":10033,"date":"2023-11-28T21:24:54","date_gmt":"2023-11-28T13:24:54","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=10033"},"modified":"2023-12-07T10:44:00","modified_gmt":"2023-12-07T02:44:00","slug":"jvm-zhong-gu-zhang-chu-li-gong-ju-zhi-dao-ma","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/jvm-zhong-gu-zhang-chu-li-gong-ju-zhi-dao-ma\/","title":{"rendered":"JVM\u4e2d\u6545\u969c\u5904\u7406\u5de5\u5177\u77e5\u9053\u5417\uff1f"},"content":{"rendered":"<p>\u5728Java\u865a\u62df\u673a\u4e2d\uff0c\u6709\u4e00\u4e9b\u5e38\u7528\u7684\u6545\u969c\u5904\u7406\u5de5\u5177\u548c\u6280\u672f\uff0c\u7528\u4e8e\u8bca\u65ad\u548c\u89e3\u51b3\u5e94\u7528\u7a0b\u5e8f\u6027\u80fd\u95ee\u9898\u3001\u5185\u5b58\u6cc4\u6f0f\u3001\u7ebf\u7a0b\u95ee\u9898\u7b49\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u89c1\u7684\u6545\u969c\u5904\u7406\u5de5\u5177\uff1a<\/p>\n<h3><a id=\"1-java-visualvm\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>1. <strong>Java VisualVM:<\/strong><\/h3>\n<ul>\n<li><strong>\u7528\u9014\uff1a<\/strong> Java VisualVM \u662f\u4e00\u6b3e\u6027\u80fd\u5206\u6790\u5de5\u5177\uff0c\u53ef\u4ee5\u76d1\u89c6\u3001\u7ba1\u7406\u548c\u8bca\u65ad Java \u5e94\u7528\u7a0b\u5e8f\u3002<\/li>\n<li><strong>\u529f\u80fd\uff1a<\/strong> \u63d0\u4f9b\u4e86\u5806\u5185\u5b58\u548c\u7ebf\u7a0b\u7684\u5b9e\u65f6\u76d1\u63a7\uff0c\u7ebf\u7a0b\u5feb\u7167\u3001\u5185\u5b58\u5feb\u7167\u3001CPU\u5206\u6790\u7b49\u529f\u80fd\u3002<\/li>\n<\/ul>\n<h3><a id=\"2-jstack\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>2. <strong>jstack:<\/strong><\/h3>\n<ul>\n<li><strong>\u7528\u9014\uff1a<\/strong> jstack \u662f JDK \u81ea\u5e26\u7684\u4e00\u79cd\u547d\u4ee4\u884c\u5de5\u5177\uff0c\u7528\u4e8e\u751f\u6210 Java \u5e94\u7528\u7a0b\u5e8f\u4e2d\u6bcf\u4e2a\u7ebf\u7a0b\u7684\u5806\u6808\u8ddf\u8e2a\u3002<\/li>\n<li><strong>\u529f\u80fd\uff1a<\/strong> \u53ef\u7528\u4e8e\u5b9a\u4f4d\u6b7b\u9501\u3001\u7ebf\u7a0b\u7b49\u5f85\u3001\u7ebf\u7a0b\u963b\u585e\u7b49\u95ee\u9898\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">jstack &lt;pid&gt;\n<\/code><\/pre>\n<h3><a id=\"3-jmap\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>3. <strong>jmap:<\/strong><\/h3>\n<ul>\n<li><strong>\u7528\u9014\uff1a<\/strong> jmap \u7528\u4e8e\u751f\u6210\u5806\u8f6c\u50a8\u5feb\u7167\uff0c\u53ef\u4ee5\u5728\u5206\u6790\u5185\u5b58\u4f7f\u7528\u548c\u5185\u5b58\u6cc4\u6f0f\u65f6\u4f7f\u7528\u3002<\/li>\n<li><strong>\u529f\u80fd\uff1a<\/strong> \u751f\u6210\u5806\u8f6c\u50a8\u6587\u4ef6\uff0c\u53ef\u7528\u4e8e\u5206\u6790\u5bf9\u8c61\u5206\u5e03\u3001\u68c0\u67e5\u5185\u5b58\u6cc4\u6f0f\u7b49\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">jmap -dump:format=b,file=heapdump.hprof &lt;pid&gt;\n<\/code><\/pre>\n<h3><a id=\"4-jhat\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>4. <strong>jhat:<\/strong><\/h3>\n<ul>\n<li><strong>\u7528\u9014\uff1a<\/strong> jhat \u662f JDK \u81ea\u5e26\u7684\u4e00\u4e2a\u5206\u6790\u5806\u8f6c\u50a8\u5feb\u7167\u7684\u5de5\u5177\u3002<\/li>\n<li><strong>\u529f\u80fd\uff1a<\/strong> \u63d0\u4f9b\u57fa\u4e8e\u6d4f\u89c8\u5668\u7684\u56fe\u5f62\u754c\u9762\uff0c\u7528\u4e8e\u5206\u6790\u5806\u8f6c\u50a8\u6587\u4ef6\u4e2d\u7684\u5bf9\u8c61\u3001\u5f15\u7528\u5173\u7cfb\u7b49\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">jhat heapdump.hprof\n<\/code><\/pre>\n<h3><a id=\"5-jvisualvm\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>5. <strong>jvisualvm:<\/strong><\/h3>\n<ul>\n<li><strong>\u7528\u9014\uff1a<\/strong> jvisualvm \u662f\u4e00\u4e2a\u96c6\u6210\u4e86\u591a\u4e2a\u5de5\u5177\u7684\u56fe\u5f62\u5316\u5de5\u5177\uff0c\u5305\u62ec VisualGC\u3001Profiler\u3001Heap Dump \u7b49\u3002<\/li>\n<li><strong>\u529f\u80fd\uff1a<\/strong> \u63d0\u4f9b\u4e86\u5bf9 Java \u5e94\u7528\u7a0b\u5e8f\u7684\u76d1\u63a7\u548c\u8bca\u65ad\u7684\u7efc\u5408\u652f\u6301\u3002<\/li>\n<\/ul>\n<h3><a id=\"6-java-flight-recorder-jfr\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>6. <strong>Java Flight Recorder (JFR):<\/strong><\/h3>\n<ul>\n<li><strong>\u7528\u9014\uff1a<\/strong> JFR \u662f JDK \u81ea\u5e26\u7684\u4e00\u4e2a\u4e8b\u4ef6\u8bb0\u5f55\u5f15\u64ce\uff0c\u7528\u4e8e\u8bb0\u5f55 Java \u5e94\u7528\u7a0b\u5e8f\u8fd0\u884c\u65f6\u7684\u4e8b\u4ef6\u4fe1\u606f\u3002<\/li>\n<li><strong>\u529f\u80fd\uff1a<\/strong> \u63d0\u4f9b\u4f4e\u5f00\u9500\u7684\u6027\u80fd\u548c\u6545\u969c\u5206\u6790\uff0c\u53ef\u4ee5\u751f\u6210\u8be6\u7ec6\u7684\u8fd0\u884c\u65f6\u4e8b\u4ef6\u6570\u636e\u3002<\/li>\n<\/ul>\n<h3><a id=\"7-visualgc\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>7. <strong>VisualGC:<\/strong><\/h3>\n<ul>\n<li><strong>\u7528\u9014\uff1a<\/strong> VisualGC \u662f jvisualvm \u7684\u4e00\u4e2a\u63d2\u4ef6\uff0c\u7528\u4e8e\u76d1\u63a7\u548c\u5206\u6790 Java \u865a\u62df\u673a\u7684\u5783\u573e\u56de\u6536\u884c\u4e3a\u3002<\/li>\n<li><strong>\u529f\u80fd\uff1a<\/strong> \u63d0\u4f9b\u56fe\u5f62\u754c\u9762\u5c55\u793a\u5806\u5185\u5b58\u3001\u5783\u573e\u56de\u6536\u3001\u7c7b\u52a0\u8f7d\u7b49\u4fe1\u606f\u3002<\/li>\n<\/ul>\n<p>\u8fd9\u4e9b\u5de5\u5177\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u4fe1\u606f\u548c\u529f\u80fd\uff0c\u5e2e\u52a9\u5f00\u53d1\u4eba\u5458\u5b9a\u4f4d\u548c\u89e3\u51b3Java\u5e94\u7528\u7a0b\u5e8f\u4e2d\u7684\u6027\u80fd\u95ee\u9898\u548c\u6545\u969c\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u901a\u5e38\u9700\u8981\u7ed3\u5408\u591a\u4e2a\u5de5\u5177\u4e00\u8d77\u4f7f\u7528\uff0c\u4ee5\u5168\u9762\u5730\u5206\u6790\u548c\u8bca\u65adJava\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728Java\u865a\u62df\u673a\u4e2d\uff0c\u6709\u4e00\u4e9b\u5e38\u7528\u7684\u6545\u969c\u5904\u7406\u5de5\u5177\u548c\u6280\u672f\uff0c\u7528\u4e8e\u8bca\u65ad\u548c\u89e3\u51b3\u5e94\u7528\u7a0b\u5e8f\u6027\u80fd\u95ee\u9898\u3001\u5185\u5b58\u6cc4\u6f0f\u3001\u7ebf\u7a0b\u95ee\u9898\u7b49\u3002\u4ee5\u4e0b [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[119],"tags":[],"class_list":["post-10033","post","type-post","status-publish","format-standard","hentry","category-jvm"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10033","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=10033"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10033\/revisions"}],"predecessor-version":[{"id":16789,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10033\/revisions\/16789"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=10033"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=10033"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=10033"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}