{"id":11023,"date":"2023-11-28T21:49:55","date_gmt":"2023-11-28T13:49:55","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=11023"},"modified":"2023-12-07T16:13:02","modified_gmt":"2023-12-07T08:13:02","slug":"jvm-zhong-zen-me-huo-qujava-cheng-xu-shi-yong-de-n","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/jvm-zhong-zen-me-huo-qujava-cheng-xu-shi-yong-de-n\/","title":{"rendered":"JVM\u4e2d\u600e\u4e48\u83b7\u53d6Java\u7a0b\u5e8f\u4f7f\u7528\u7684\u5185\u5b58\uff1f\u5806\u4f7f\u7528\u7684\u767e\u5206\u6bd4\uff1f"},"content":{"rendered":"<p>\u5728Java\u7a0b\u5e8f\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7Java Management Extensions\uff08JMX\uff09\u6765\u83b7\u53d6Java\u865a\u62df\u673a\u7684\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\uff0c\u5305\u62ec\u5806\u5185\u5b58\u7684\u4f7f\u7528\u767e\u5206\u6bd4\u3002\u5177\u4f53\u800c\u8a00\uff0c\u53ef\u4ee5\u4f7f\u7528<code>MemoryMXBean<\/code>\u548c<code>MemoryUsage<\/code>\u6765\u83b7\u53d6\u5185\u5b58\u4fe1\u606f\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684Java\u4ee3\u7801\u7247\u6bb5\uff0c\u6f14\u793a\u5982\u4f55\u4f7f\u7528JMX\u83b7\u53d6Java\u7a0b\u5e8f\u7684\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\u4ee5\u53ca\u5806\u5185\u5b58\u4f7f\u7528\u767e\u5206\u6bd4\uff1a<\/p>\n<pre><code class=\"language-java\">import java.lang.management.ManagementFactory;\nimport java.lang.management.MemoryMXBean;\nimport java.lang.management.MemoryUsage;\n\npublic class MemoryUsageExample {\n    public static void main(String[] args) {\n        \/\/ \u83b7\u53d6MemoryMXBean\u5b9e\u4f8b\n        MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();\n\n        \/\/ \u83b7\u53d6\u5806\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\n        MemoryUsage heapMemoryUsage = memoryMXBean.getHeapMemoryUsage();\n        System.out.println(&quot;Heap Memory Usage: &quot; + heapMemoryUsage);\n\n        \/\/ \u83b7\u53d6\u975e\u5806\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\n        MemoryUsage nonHeapMemoryUsage = memoryMXBean.getNonHeapMemoryUsage();\n        System.out.println(&quot;Non-Heap Memory Usage: &quot; + nonHeapMemoryUsage);\n\n        \/\/ \u83b7\u53d6\u5806\u5185\u5b58\u4f7f\u7528\u767e\u5206\u6bd4\n        double heapUsagePercentage = calculateMemoryUsagePercentage(\n                heapMemoryUsage.getUsed(), heapMemoryUsage.getMax());\n        System.out.println(&quot;Heap Memory Usage Percentage: &quot; + heapUsagePercentage + &quot;%&quot;);\n    }\n\n    \/\/ \u8ba1\u7b97\u5185\u5b58\u4f7f\u7528\u767e\u5206\u6bd4\n    private static double calculateMemoryUsagePercentage(long used, long max) {\n        return ((double) used \/ max) * 100;\n    }\n}\n<\/code><\/pre>\n<p>\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u901a\u8fc7<code>ManagementFactory.getMemoryMXBean()<\/code>\u83b7\u53d6<code>MemoryMXBean<\/code>\u5b9e\u4f8b\uff0c\u7136\u540e\u4f7f\u7528<code>getHeapMemoryUsage()<\/code>\u548c<code>getNonHeapMemoryUsage()<\/code>\u83b7\u53d6\u5806\u548c\u975e\u5806\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\u3002\u901a\u8fc7\u8ba1\u7b97\u5df2\u4f7f\u7528\u5185\u5b58\u4e0e\u6700\u5927\u5185\u5b58\u4e4b\u6bd4\uff0c\u53ef\u4ee5\u5f97\u5230\u5806\u5185\u5b58\u7684\u4f7f\u7528\u767e\u5206\u6bd4\u3002<\/p>\n<p>\u9700\u8981\u6ce8\u610f\uff0c\u4e0a\u8ff0\u4ee3\u7801\u4ec5\u4e3a\u6f14\u793a\u7528\u9014\uff0c\u5b9e\u9645\u5e94\u7528\u4e2d\u53ef\u80fd\u9700\u8981\u66f4\u5168\u9762\u5730\u76d1\u63a7\u548c\u5904\u7406\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\uff0c\u4ee5\u4fbf\u53ca\u65f6\u53d1\u73b0\u548c\u89e3\u51b3\u5185\u5b58\u95ee\u9898\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728Java\u7a0b\u5e8f\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7Java Management Extensions\uff08JMX\uff09\u6765\u83b7\u53d6Java\u865a\u62df\u673a\u7684 [&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-11023","post","type-post","status-publish","format-standard","hentry","category-jvm"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11023","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=11023"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11023\/revisions"}],"predecessor-version":[{"id":16933,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11023\/revisions\/16933"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=11023"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=11023"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=11023"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}