{"id":202531,"date":"2025-05-22T09:01:13","date_gmt":"2025-05-22T01:01:13","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202531\/"},"modified":"2025-05-22T09:01:13","modified_gmt":"2025-05-22T01:01:13","slug":"%e5%a6%82%e4%bd%95%e9%80%9a%e8%bf%87%e5%ae%9a%e5%88%b6-jvm-%e5%8f%82%e6%95%b0%e6%8f%90%e5%8d%87-java-%e5%87%bd%e6%95%b0%e6%80%a7%e8%83%bd%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202531\/","title":{"rendered":"\u5982\u4f55\u901a\u8fc7\u5b9a\u5236 JVM \u53c2\u6570\u63d0\u5347 Java \u51fd\u6570\u6027\u80fd\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u5982\u4f55\u901a\u8fc7\u5b9a\u5236 JVM \u53c2\u6570\u63d0\u5347 Java 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\u53c2\u6570\uff0c\u5982\u8c03\u6574\u5806\u7a7a\u95f4\u5927\u5c0f\u548c\u4f18\u5316\u5783\u573e\u56de\u6536\u673a\u5236\uff0c\u53ef\u4ee5\u63d0\u5347 Java \u51fd\u6570\u6027\u80fd\u3002\u6839\u636e\u5e94\u7528\u7a0b\u5e8f\u9700\u6c42\uff0c\u53ef\u9010\u6b65\u8fdb\u884c\u4ee5\u4e0b\u4f18\u5316\uff1a1. \u8c03\u6574\u5806\u7a7a\u95f4\u5927\u5c0f\uff08Xmx\u3001Xms\uff09\uff1b2. \u8bbe\u7f6e\u5e74\u8f7b\u4ee3\u5230\u957f\u671f\u4ee3\u664b\u5347\u9608\u503c\uff08-XX:InitialTenuringThreshold\uff09\uff1b3. \u5f00\u542f\u538b\u7f29\u6307\u9488\u4f18\u5316\uff08-XX:+UseCompressedOops\uff09\uff1b4. \u542f\u7528\u5e76\u884c\u5783\u573e\u56de\u6536\uff08-XX:+UseParallelGC\uff09\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729915403671c6a0b75656.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u5982\u4f55\u901a\u8fc7\u5b9a\u5236 JVM \u53c2\u6570\u63d0\u5347 Java \u51fd\u6570\u6027\u80fd\uff1f<\/strong><\/p>\n<p><strong>\u5f15\u8a00<\/strong><\/p>\n<p>JVM\uff08Java \u865a\u62df\u673a\uff09\u53c2\u6570\u5bf9 Java \u51fd\u6570\u7684\u6027\u80fd\u81f3\u5173\u91cd\u8981\u3002\u901a\u8fc7\u5b9a\u5236 JVM \u53c2\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u4f18\u5316\u8d44\u6e90\u5206\u914d\uff0c\u63d0\u9ad8\u4ee3\u7801\u6267\u884c\u6548\u7387\u3002\u672c\u6587\u5c06\u6307\u5bfc\u60a8\u5982\u4f55\u6839\u636e\u5177\u4f53\u5e94\u7528\u7a0b\u5e8f\u9700\u6c42\uff0c\u5b9a\u5236 JVM \u53c2\u6570\u4ee5\u63d0\u5347 Java \u51fd\u6570\u6027\u80fd\u3002<\/p>\n<p><strong>\u5b9a\u5236 JVM \u53c2\u6570\u7684\u6700\u4f73\u5b9e\u8df5<\/strong><\/p>\n<ul>\n<li><strong>\u5206\u6790\u5e94\u7528\u7a0b\u5e8f\u884c\u4e3a\uff1a<\/strong>\u4f7f\u7528\u6027\u80fd\u5206\u6790\u5de5\u5177\uff08\u5982 JMeter\u3001YourKit Java Profiler\uff09\u5206\u6790\u5e94\u7528\u7a0b\u5e8f\u884c\u4e3a\uff0c\u8bc6\u522b\u6027\u80fd\u74f6\u9888\u3002<\/li>\n<li><strong>\u8bc4\u4f30\u7cfb\u7edf\u8d44\u6e90\uff1a<\/strong>\u786e\u5b9a\u7cfb\u7edf\u7684 CPU\u3001\u5185\u5b58\u548c\u7f51\u7edc\u8d44\u6e90\u5bb9\u91cf\uff0c\u4ee5\u5408\u7406\u5206\u914d JVM \u8d44\u6e90\u3002<\/li>\n<li><strong>\u9010\u6b65\u8c03\u6574\uff1a<\/strong>\u4e00\u6b21\u53ea\u4fee\u6539\u4e00\u4e2a JVM \u53c2\u6570\uff0c\u76d1\u6d4b\u6027\u80fd\u53d8\u5316\uff0c\u4ee5\u51c6\u786e\u8bc4\u4f30\u5f71\u54cd\u3002<\/li>\n<li><strong>\u4f7f\u7528\u6807\u51c6\uff1a<\/strong>\u9075\u5faa Java \u793e\u533a\u5236\u5b9a\u7684\u5efa\u8bae\uff0c\u5982 [Java \u6027\u80fd\u8c03\u4f18\u6307\u5357](https:\/\/docs.oracle.com\/javase\/8\/docs\/technotes\/guides\/vm\/performance-tuning.html)\u3002<\/li>\n<\/ul>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p><strong>Xmx \u548c Xms\uff1a<\/strong>\u6307\u5b9a\u5806\u7a7a\u95f4\u5927\u5c0f\u3002<\/p>\n<ul>\n<li>\u5bf9\u4e8e\u9891\u7e41\u53d1\u751f\u5783\u573e\u56de\u6536\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u589e\u52a0 Xmx \u503c\u4ee5\u51cf\u5c11\u56de\u6536\u65f6\u95f4\u3002<\/li>\n<li>\u5bf9\u4e8e\u5185\u5b58\u4f7f\u7528\u91cf\u76f8\u5bf9\u7a33\u5b9a\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u53ef\u4ee5\u964d\u4f4e Xms \u503c\u4ee5\u51cf\u5c11\u542f\u52a8\u65f6\u95f4\u3002<\/li>\n<\/ul>\n<p><strong>-XX:InitialTenuringThreshold\uff1a<\/strong>\u8bbe\u7f6e\u5e74\u8f7b\u4ee3 GC \u5230\u957f\u671f\u4ee3\u7684\u664b\u5347\u9608\u503c\u3002<\/p>\n<ul>\n<li>\u5bf9\u4e8e\u5bf9\u8c61\u751f\u547d\u5468\u671f\u8f83\u957f\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u589e\u52a0\u6b64\u503c\u4ee5\u51cf\u5c11\u5e74\u8f7b\u4ee3 GC \u9891\u7387\u3002<\/li>\n<li>\u5bf9\u4e8e\u5bf9\u8c61\u751f\u547d\u5468\u671f\u8f83\u77ed\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u964d\u4f4e\u6b64\u503c\u4ee5\u63d0\u9ad8\u5e74\u8f7b\u4ee3 GC \u6548\u7387\u3002<\/li>\n<\/ul>\n<p><strong>-XX:+UseCompressedOops\uff1a<\/strong>\u5f00\u542f\u538b\u7f29\u6307\u9488\u4ee5\u4f18\u5316\u5185\u5b58\u4f7f\u7528\u3002<\/p>\n<ul>\n<li>\u5bf9\u4e8e 32 \u4f4d JVM\uff0c\u6b64\u9009\u9879\u53ef\u5c06\u6307\u9488\u5927\u5c0f\u4ece 4 \u5b57\u8282\u51cf\u5c0f\u5230 2 \u5b57\u8282\uff0c\u4ece\u800c\u63d0\u9ad8\u5185\u5b58\u5229\u7528\u7387\u3002<\/li>\n<li>\u5bf9\u4e8e 64 \u4f4d JVM\uff0c\u6b64\u9009\u9879\u901a\u5e38\u4e0d\u5efa\u8bae\u4f7f\u7528\u3002<\/li>\n<\/ul>\n<p><strong>-XX:+UseParallelGC\uff1a<\/strong>\u542f\u7528\u5e76\u884c GC \u4ee5\u63d0\u5347\u5783\u573e\u56de\u6536\u6027\u80fd\u3002<\/p>\n<ul>\n<li>\u5bf9\u4e8e\u591a\u6838\u5904\u7406\u5668\u7cfb\u7edf\uff0c\u6b64\u9009\u9879\u901a\u8fc7\u5e76\u884c\u6267\u884c GC \u4efb\u52a1\u63d0\u9ad8\u6548\u7387\u3002<\/li>\n<li>\u5bf9\u4e8e\u5355\u6838\u5904\u7406\u5668\u7cfb\u7edf\uff0c\u6b64\u9009\u9879\u53ef\u80fd\u5e26\u6765\u5f00\u9500\uff0c\u5e94\u8c28\u614e\u4f7f\u7528\u3002<\/li>\n<\/ul>\n<p><strong>\u7ed3\u8bba<\/strong><\/p>\n<p>\u901a\u8fc7\u9075\u5faa\u6700\u4f73\u5b9e\u8df5\u548c\u5b9e\u6218\u6848\u4f8b\uff0c\u5b9a\u5236 JVM \u53c2\u6570\u53ef\u4ee5\u663e\u8457\u63d0\u5347 Java \u51fd\u6570\u6027\u80fd\u3002\u901a\u8fc7\u7ec6\u81f4\u7684\u5206\u6790\u548c\u8c03\u6574\uff0c\u60a8\u53ef\u4ee5\u4f18\u5316\u8d44\u6e90\u4f7f\u7528\uff0c\u63d0\u9ad8\u4ee3\u7801\u6267\u884c\u6548\u7387\uff0c\u4e3a\u60a8\u7684\u7528\u6237\u63d0\u4f9b\u6d41\u7545\u65e0\u7f1d\u7684\u5e94\u7528\u7a0b\u5e8f\u4f53\u9a8c\u3002<\/p>\n<p>\u4eca\u5929\u5173\u4e8e\u300a\u5982\u4f55\u901a\u8fc7\u5b9a\u5236 JVM \u53c2\u6570\u63d0\u5347 Java 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