{"id":688,"date":"2023-05-28T02:10:40","date_gmt":"2023-05-27T18:10:40","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/?p=688"},"modified":"2023-05-28T02:10:40","modified_gmt":"2023-05-27T18:10:40","slug":"java-%e7%ba%bf%e4%b8%8a%e6%95%85%e9%9a%9c%e6%8e%92%e6%9f%a5%e5%ae%8c%e6%95%b4%e5%a5%97%e8%b7%af%ef%bc%8c%e4%bb%8e-cpu%e3%80%81%e7%a3%81%e7%9b%98%e3%80%81%e5%86%85%e5%ad%98%e3%80%81%e7%bd%91%e7%bb%9c","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/java\/java-%e7%ba%bf%e4%b8%8a%e6%95%85%e9%9a%9c%e6%8e%92%e6%9f%a5%e5%ae%8c%e6%95%b4%e5%a5%97%e8%b7%af%ef%bc%8c%e4%bb%8e-cpu%e3%80%81%e7%a3%81%e7%9b%98%e3%80%81%e5%86%85%e5%ad%98%e3%80%81%e7%bd%91%e7%bb%9c\/","title":{"rendered":"JAVA \u7ebf\u4e0a\u6545\u969c\u6392\u67e5\u5b8c\u6574\u5957\u8def\uff0c\u4ece CPU\u3001\u78c1\u76d8\u3001\u5185\u5b58\u3001\u7f51\u7edc\u3001GC \u4e00\u6761\u9f99\uff01"},"content":{"rendered":"<div class='wxsyncmain'>\n<section>\n<section powered-by=\"xiumi.us\">\n<section>\n<section>\n<section>\n<section powered-by=\"xiumi.us\">\n<section>\n<section>\n<p><img decoding=\"async\" class=\"rich_pages lazyload\" data-backh=\"138\" data-backw=\"498\" data-ratio=\"0.2778649921507064\"  data-type=\"gif\" data-w=\"637\" style=\"width: 100%;\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015122234.gif\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"  \/><noscript><img decoding=\"async\" class=\"rich_pages\" data-backh=\"138\" data-backw=\"498\" data-ratio=\"0.2778649921507064\"  data-type=\"gif\" data-w=\"637\" style=\"width: 100%;\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015122234.gif\"  \/><\/noscript><br  \/><\/p>\n<hr style=\"border-style: solid;border-width: 1px 0 0;border-color: rgba(0,0,0,0.1);-webkit-transform-origin: 0 0;-webkit-transform: scale(1, 0.5);transform-origin: 0 0;transform: scale(1, 0.5);\"  \/>\n<p style=\"max-width: 100%;box-sizing: border-box;min-height: 1em;word-wrap: break-word !important;\"><span style=\"color: rgb(178, 178, 178);font-size: 12px;\">\u4f5c\u8005:<\/span><span style=\"color: rgb(178, 178, 178);font-size: 12px;\">fredal<\/span><\/p>\n<p style=\"max-width: 100%;box-sizing: border-box;min-height: 1em;overflow-wrap: break-word !important;\"><span style=\"color: rgb(178, 178, 178);font-size: 12px;\">\u6765\u6e90:https:\/\/fredal.xin\/java-error-check<\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<ul data-tool=\"mdnice\u7f16\u8f91\u5668\" class=\"list-paddingleft-2\" style=\"max-width: 100%;font-family: -apple-system-font, BlinkMacSystemFont, &quot;Helvetica Neue&quot;, &quot;PingFang SC&quot;, &quot;Hiragino Sans GB&quot;, &quot;Microsoft YaHei UI&quot;, &quot;Microsoft YaHei&quot;, Arial, sans-serif;letter-spacing: 0.544px;white-space: normal;background-color: rgb(255, 255, 255);overflow-wrap: break-word !important;\">\n<li style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\n<section style=\"margin-top: 5px;margin-bottom: 5px;max-width: 100%;line-height: 26px;color: rgb(1, 1, 1);box-sizing: border-box !important;overflow-wrap: break-word !important;\">CPU<\/section>\n<\/li>\n<li style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\n<section style=\"margin-top: 5px;margin-bottom: 5px;max-width: 100%;line-height: 26px;color: rgb(1, 1, 1);box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u78c1\u76d8<\/section>\n<\/li>\n<li style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\n<section style=\"margin-top: 5px;margin-bottom: 5px;max-width: 100%;line-height: 26px;color: rgb(1, 1, 1);box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u5185\u5b58<\/section>\n<\/li>\n<li style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\n<section style=\"margin-top: 5px;margin-bottom: 5px;max-width: 100%;line-height: 26px;color: rgb(1, 1, 1);box-sizing: border-box !important;overflow-wrap: break-word !important;\">GC\u95ee\u9898<\/section>\n<\/li>\n<li style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\n<section style=\"margin-top: 5px;margin-bottom: 5px;max-width: 100%;line-height: 26px;color: rgb(1, 1, 1);box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u7f51\u7edc<\/section>\n<\/li>\n<\/ul>\n<section data-tool=\"mdnice\u7f16\u8f91\u5668\" data-website=\"https:\/\/www.mdnice.com\" style=\"max-width: 100%;font-family: -apple-system-font, BlinkMacSystemFont, &quot;Helvetica Neue&quot;, &quot;PingFang SC&quot;, &quot;Hiragino Sans GB&quot;, &quot;Microsoft YaHei UI&quot;, &quot;Microsoft YaHei&quot;, Arial, sans-serif;letter-spacing: 0.544px;white-space: normal;background-color: rgb(255, 255, 255);box-sizing: border-box !important;overflow-wrap: break-word !important;\">\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u7ebf\u4e0a\u6545\u969c\u4e3b\u8981\u4f1a\u5305\u62eccpu\u3001\u78c1\u76d8\u3001\u5185\u5b58\u4ee5\u53ca\u7f51\u7edc\u95ee\u9898\uff0c\u800c\u5927\u591a\u6570\u6545\u969c\u53ef\u80fd\u4f1a\u5305\u542b\u4e0d\u6b62\u4e00\u4e2a\u5c42\u9762\u7684\u95ee\u9898\uff0c\u6240\u4ee5\u8fdb\u884c\u6392\u67e5\u65f6\u5019\u5c3d\u91cf\u56db\u4e2a\u65b9\u9762\u4f9d\u6b21\u6392\u67e5\u4e00\u904d\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u540c\u65f6\u4f8b\u5982jstack\u3001jmap\u7b49\u5de5\u5177\u4e5f\u662f\u4e0d\u56ff\u4e8e\u4e00\u4e2a\u65b9\u9762\u7684\u95ee\u9898\u7684\uff0c\u57fa\u672c\u4e0a\u51fa\u95ee\u9898\u5c31\u662fdf\u3001free\u3001top \u4e09\u8fde\uff0c\u7136\u540e\u4f9d\u6b21jstack\u3001jmap\u4f3a\u5019\uff0c\u5177\u4f53\u95ee\u9898\u5177\u4f53\u5206\u6790\u5373\u53ef\u3002<\/p>\n<h2 data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"margin-top: 30px;margin-bottom: 15px;font-weight: bold;font-size: 1.3em;max-width: 100%;border-bottom: 2px solid rgb(239, 112, 96);box-sizing: border-box !important;overflow-wrap: break-word !important;\"><span style=\"margin-right: 3px;padding: 3px 10px 1px;max-width: 100%;display: inline-block;background: rgb(239, 112, 96);color: rgb(255, 255, 255);border-top-right-radius: 3px;border-top-left-radius: 3px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">CPU<\/span><span style=\"max-width: 100%;display: inline-block;vertical-align: bottom;border-bottom: 36px solid rgb(239, 235, 233);border-right: 20px solid transparent;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><\/span><\/h2>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u4e00\u822c\u6765\u8bb2\u6211\u4eec\u9996\u5148\u4f1a\u6392\u67e5cpu\u65b9\u9762\u7684\u95ee\u9898\u3002cpu\u5f02\u5e38\u5f80\u5f80\u8fd8\u662f\u6bd4\u8f83\u597d\u5b9a\u4f4d\u7684\u3002\u539f\u56e0\u5305\u62ec\u4e1a\u52a1\u903b\u8f91\u95ee\u9898(\u6b7b\u5faa\u73af)\u3001\u9891\u7e41gc\u4ee5\u53ca\u4e0a\u4e0b\u6587\u5207\u6362\u8fc7\u591a\u3002\u800c\u6700\u5e38\u89c1\u7684\u5f80\u5f80\u662f\u4e1a\u52a1\u903b\u8f91(\u6216\u8005\u6846\u67b6\u903b\u8f91)\u5bfc\u81f4\u7684\uff0c\u53ef\u4ee5\u4f7f\u7528jstack\u6765\u5206\u6790\u5bf9\u5e94\u7684\u5806\u6808\u60c5\u51b5\u3002<\/p>\n<h3 data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"margin-top: 30px;margin-bottom: 15px;font-weight: bold;font-size: 20px;max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u4f7f\u7528jstack\u5206\u6790cpu\u95ee\u9898<\/h3>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u6211\u4eec\u5148\u7528ps\u547d\u4ee4\u627e\u5230\u5bf9\u5e94\u8fdb\u7a0b\u7684pid(\u5982\u679c\u4f60\u6709\u597d\u51e0\u4e2a\u76ee\u6807\u8fdb\u7a0b\uff0c\u53ef\u4ee5\u5148\u7528top\u770b\u4e00\u4e0b\u54ea\u4e2a\u5360\u7528\u6bd4\u8f83\u9ad8)\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u63a5\u7740\u7528top -H -p pid\u6765\u627e\u5230cpu\u4f7f\u7528\u7387\u6bd4\u8f83\u9ad8\u7684\u4e00\u4e9b\u7ebf\u7a0b<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><img decoding=\"async\" class=\"lazyload\"data-ratio=\"0.3536404160475483\" data-type=\"png\" data-w=\"1346\"  style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-backw=\"578\" data-backh=\"204\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015124318.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"  \/><noscript><img decoding=\"async\" data-ratio=\"0.3536404160475483\" data-type=\"png\" data-w=\"1346\"  style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-backw=\"578\" data-backh=\"204\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015124318.png\"  \/><\/noscript><\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u7136\u540e\u5c06\u5360\u7528\u6700\u9ad8\u7684pid\u8f6c\u6362\u4e3a16\u8fdb\u5236<code style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">printf '%xn' pid<\/code>\u5f97\u5230nid<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><img decoding=\"async\" class=\"lazyload\"data-ratio=\"0.14901960784313725\" data-type=\"png\" data-w=\"510\"  style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-backw=\"510\" data-backh=\"76\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015127818.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"  \/><noscript><img decoding=\"async\" data-ratio=\"0.14901960784313725\" data-type=\"png\" data-w=\"510\"  style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-backw=\"510\" data-backh=\"76\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015127818.png\"  \/><\/noscript><\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u63a5\u7740\u76f4\u63a5\u5728jstack\u4e2d\u627e\u5230\u76f8\u5e94\u7684\u5806\u6808\u4fe1\u606f<code style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">jstack pid |grep 'nid' -C5 \u2013color<\/code><\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><img decoding=\"async\" class=\"lazyload\"data-ratio=\"0.2435754189944134\" data-type=\"png\" data-w=\"1790\"  style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-backw=\"578\" data-backh=\"141\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015128796.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"  \/><noscript><img decoding=\"async\" data-ratio=\"0.2435754189944134\" data-type=\"png\" data-w=\"1790\"  style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-backw=\"578\" data-backh=\"141\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015128796.png\"  \/><\/noscript><\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u53ef\u4ee5\u770b\u5230\u6211\u4eec\u5df2\u7ecf\u627e\u5230\u4e86nid\u4e3a0x42\u7684\u5806\u6808\u4fe1\u606f\uff0c\u63a5\u7740\u53ea\u8981\u4ed4\u7ec6\u5206\u6790\u4e00\u756a\u5373\u53ef\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u5f53\u7136\u66f4\u5e38\u89c1\u7684\u662f\u6211\u4eec\u5bf9\u6574\u4e2ajstack\u6587\u4ef6\u8fdb\u884c\u5206\u6790\uff0c\u901a\u5e38\u6211\u4eec\u4f1a\u6bd4\u8f83\u5173\u6ce8WAITING\u548cTIMED_WAITING\u7684\u90e8\u5206\uff0cBLOCKED\u5c31\u4e0d\u7528\u8bf4\u4e86\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u547d\u4ee4<code style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">cat jstack.log | grep \"java.lang.Thread.State\" | sort -nr | uniq -c<\/code>\u6765\u5bf9jstack\u7684\u72b6\u6001\u6709\u4e00\u4e2a\u6574\u4f53\u7684\u628a\u63e1\uff0c\u5982\u679cWAITING\u4e4b\u7c7b\u7684\u7279\u522b\u591a\uff0c\u90a3\u4e48\u591a\u534a\u662f\u6709\u95ee\u9898\u5566\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><img decoding=\"async\" class=\"lazyload\"data-ratio=\"0.2037914691943128\" data-type=\"png\" data-w=\"1266\"  style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-backw=\"578\" data-backh=\"118\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015130417.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"  \/><noscript><img decoding=\"async\" data-ratio=\"0.2037914691943128\" data-type=\"png\" data-w=\"1266\"  style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-backw=\"578\" data-backh=\"118\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015130417.png\"  \/><\/noscript><\/p>\n<h3 data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"margin-top: 30px;margin-bottom: 15px;font-weight: bold;font-size: 20px;max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u9891\u7e41gc<\/h3>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u5f53\u7136\u6211\u4eec\u8fd8\u662f\u4f1a\u4f7f\u7528jstack\u6765\u5206\u6790\u95ee\u9898\uff0c\u4f46\u6709\u65f6\u5019\u6211\u4eec\u53ef\u4ee5\u5148\u786e\u5b9a\u4e0bgc\u662f\u4e0d\u662f\u592a\u9891\u7e41\uff0c\u4f7f\u7528jstat -gc pid 1000\u547d\u4ee4\u6765\u5bf9gc\u5206\u4ee3\u53d8\u5316\u60c5\u51b5\u8fdb\u884c\u89c2\u5bdf\uff0c1000\u8868\u793a\u91c7\u6837\u95f4\u9694(ms)\uff0cS0C\/S1C\u3001S0U\/S1U\u3001EC\/EU\u3001OC\/OU\u3001MC\/MU\u5206\u522b\u4ee3\u8868\u4e24\u4e2aSurvivor\u533a\u3001Eden\u533a\u3001\u8001\u5e74\u4ee3\u3001\u5143\u6570\u636e\u533a\u7684\u5bb9\u91cf\u548c\u4f7f\u7528\u91cf\u3002YGC\/YGT\u3001FGC\/FGCT\u3001GCT\u5219\u4ee3\u8868YoungGc\u3001FullGc\u7684\u8017\u65f6\u548c\u6b21\u6570\u4ee5\u53ca\u603b\u8017\u65f6\u3002\u5982\u679c\u770b\u5230gc\u6bd4\u8f83\u9891\u7e41\uff0c\u518d\u9488\u5bf9gc\u65b9\u9762\u505a\u8fdb\u4e00\u6b65\u5206\u6790\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><img decoding=\"async\" class=\"lazyload\"data-ratio=\"0.11276223776223776\" data-type=\"png\" data-w=\"2288\"  style=\"box-sizing: 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data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015134791.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"><noscript><img decoding=\"async\" data-backh=\"128\" data-backw=\"578\" data-ratio=\"0.22255192878338279\"  data-type=\"png\" data-w=\"1348\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015134791.png\"><\/noscript><\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">cs(context switch)\u4e00\u5217\u5219\u4ee3\u8868\u4e86\u4e0a\u4e0b\u6587\u5207\u6362\u7684\u6b21\u6570\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 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src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"><noscript><img decoding=\"async\" data-backh=\"129\" data-backw=\"578\" data-ratio=\"0.22336065573770492\"  data-type=\"png\" data-w=\"1952\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015140303.png\"><\/noscript><\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word 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data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u4e0d\u8fc7\u8fd9\u8fb9\u62ff\u5230\u7684\u662ftid\uff0c\u6211\u4eec\u8981\u8f6c\u6362\u6210pid\uff0c\u53ef\u4ee5\u901a\u8fc7readlink\u6765\u627e\u5230pidreadlink -f \/proc\/*\/task\/tid\/..\/..\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><img decoding=\"async\" class=\"lazyload\"data-backh=\"51\" data-backw=\"578\" data-ratio=\"0.08898305084745763\"  data-type=\"png\" data-w=\"944\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015145753.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"><noscript><img decoding=\"async\" data-backh=\"51\" data-backw=\"578\" data-ratio=\"0.08898305084745763\"  data-type=\"png\" data-w=\"944\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015145753.png\"><\/noscript><\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u627e\u5230pid\u4e4b\u540e\u5c31\u53ef\u4ee5\u770b\u8fd9\u4e2a\u8fdb\u7a0b\u5177\u4f53\u7684\u8bfb\u5199\u60c5\u51b5cat \/proc\/pid\/io<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><img decoding=\"async\" class=\"lazyload\"data-backh=\"247\" data-backw=\"578\" data-ratio=\"0.42727272727272725\"  data-type=\"png\" data-w=\"660\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015146114.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"><noscript><img decoding=\"async\" data-backh=\"247\" data-backw=\"578\" data-ratio=\"0.42727272727272725\"  data-type=\"png\" data-w=\"660\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" 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data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015147734.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"><noscript><img decoding=\"async\" data-backh=\"329\" data-backw=\"578\" data-ratio=\"0.5681186283595923\"  data-type=\"png\" data-w=\"2158\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015147734.png\"><\/noscript><\/p>\n<h2 data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"margin-top: 30px;margin-bottom: 15px;font-weight: bold;font-size: 1.3em;max-width: 100%;border-bottom: 2px solid rgb(239, 112, 96);box-sizing: border-box !important;overflow-wrap: break-word !important;\"><span style=\"margin-right: 3px;padding: 3px 10px 1px;max-width: 100%;display: inline-block;background: rgb(239, 112, 96);color: rgb(255, 255, 255);border-top-right-radius: 3px;border-top-left-radius: 3px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u5185\u5b58<\/span><span style=\"max-width: 100%;display: inline-block;vertical-align: bottom;border-bottom: 36px solid rgb(239, 235, 233);border-right: 20px solid transparent;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><\/span><\/h2>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u5185\u5b58\u95ee\u9898\u6392\u67e5\u8d77\u6765\u76f8\u5bf9\u6bd4CPU\u9ebb\u70e6\u4e00\u4e9b\uff0c\u573a\u666f\u4e5f\u6bd4\u8f83\u591a\u3002\u4e3b\u8981\u5305\u62ecOOM\u3001GC\u95ee\u9898\u548c\u5806\u5916\u5185\u5b58\u3002\u4e00\u822c\u6765\u8bb2\uff0c\u6211\u4eec\u4f1a\u5148\u7528free\u547d\u4ee4\u5148\u6765\u68c0\u67e5\u4e00\u53d1\u5185\u5b58\u7684\u5404\u79cd\u60c5\u51b5\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><img decoding=\"async\" class=\"lazyload\"data-backh=\"67\" data-backw=\"578\" data-ratio=\"0.1156773211567732\"  data-type=\"png\" data-w=\"1314\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015157669.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"><noscript><img decoding=\"async\" data-backh=\"67\" data-backw=\"578\" data-ratio=\"0.1156773211567732\"  data-type=\"png\" data-w=\"1314\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015157669.png\"><\/noscript><\/p>\n<h3 data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"margin-top: 30px;margin-bottom: 15px;font-weight: bold;font-size: 20px;max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u5806\u5185\u5185\u5b58<\/h3>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u5185\u5b58\u95ee\u9898\u5927\u591a\u8fd8\u90fd\u662f\u5806\u5185\u5185\u5b58\u95ee\u9898\u3002\u8868\u8c61\u4e0a\u4e3b\u8981\u5206\u4e3aOOM\u548cStackOverflow\u3002<\/p>\n<h4 data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"margin-top: 30px;margin-bottom: 15px;font-weight: bold;font-size: 18px;max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">OOM<\/h4>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">JMV\u4e2d\u7684\u5185\u5b58\u4e0d\u8db3\uff0cOOM\u5927\u81f4\u53ef\u4ee5\u5206\u4e3a\u4ee5\u4e0b\u51e0\u79cd\uff1a<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><code style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">Exception in thread \"main\" java.lang.OutOfMemoryError: unable to create new native thread<\/code><\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u8fd9\u4e2a\u610f\u601d\u662f\u6ca1\u6709\u8db3\u591f\u7684\u5185\u5b58\u7a7a\u95f4\u7ed9\u7ebf\u7a0b\u5206\u914djava\u6808\uff0c\u57fa\u672c\u4e0a\u8fd8\u662f\u7ebf\u7a0b\u6c60\u4ee3\u7801\u5199\u7684\u6709\u95ee\u9898\uff0c\u6bd4\u5982\u8bf4\u5fd8\u8bb0shutdown\uff0c\u6240\u4ee5\u8bf4\u5e94\u8be5\u9996\u5148\u4ece\u4ee3\u7801\u5c42\u9762\u6765\u5bfb\u627e\u95ee\u9898\uff0c\u4f7f\u7528jstack\u6216\u8005jmap\u3002\u5982\u679c\u4e00\u5207\u90fd\u6b63\u5e38\uff0cJVM\u65b9\u9762\u53ef\u4ee5\u901a\u8fc7\u6307\u5b9aXss\u6765\u51cf\u5c11\u5355\u4e2athread stack\u7684\u5927\u5c0f\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u53e6\u5916\u4e5f\u53ef\u4ee5\u5728\u7cfb\u7edf\u5c42\u9762\uff0c\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539\/etc\/security\/limits.confnofile\u548cnproc\u6765\u589e\u5927os\u5bf9\u7ebf\u7a0b\u7684\u9650\u5236<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><img decoding=\"async\" class=\"lazyload\"data-backh=\"152\" data-backw=\"326\" data-ratio=\"0.4662576687116564\"  data-type=\"png\" data-w=\"326\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015158330.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"><noscript><img decoding=\"async\" data-backh=\"152\" data-backw=\"326\" data-ratio=\"0.4662576687116564\"  data-type=\"png\" data-w=\"326\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015158330.png\"><\/noscript><\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><code style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">Exception in thread \"main\" java.lang.OutOfMemoryError: Java heap space<\/code><\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u8fd9\u4e2a\u610f\u601d\u662f\u5806\u7684\u5185\u5b58\u5360\u7528\u5df2\u7ecf\u8fbe\u5230-Xmx\u8bbe\u7f6e\u7684\u6700\u5927\u503c\uff0c\u5e94\u8be5\u662f\u6700\u5e38\u89c1\u7684OOM\u9519\u8bef\u4e86\u3002\u89e3\u51b3\u601d\u8def\u4ecd\u7136\u662f\u5148\u5e94\u8be5\u5728\u4ee3\u7801\u4e2d\u627e\uff0c\u6000\u7591\u5b58\u5728\u5185\u5b58\u6cc4\u6f0f\uff0c\u901a\u8fc7jstack\u548cjmap\u53bb\u5b9a\u4f4d\u95ee\u9898\u3002\u5982\u679c\u8bf4\u4e00\u5207\u90fd\u6b63\u5e38\uff0c\u624d\u9700\u8981\u901a\u8fc7\u8c03\u6574Xmx\u7684\u503c\u6765\u6269\u5927\u5185\u5b58\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><code style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">Caused by: java.lang.OutOfMemoryError: Meta space<\/code><\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u8fd9\u4e2a\u610f\u601d\u662f\u5143\u6570\u636e\u533a\u7684\u5185\u5b58\u5360\u7528\u5df2\u7ecf\u8fbe\u5230XX:MaxMetaspaceSize\u8bbe\u7f6e\u7684\u6700\u5927\u503c\uff0c\u6392\u67e5\u601d\u8def\u548c\u4e0a\u9762\u7684\u4e00\u81f4\uff0c\u53c2\u6570\u65b9\u9762\u53ef\u4ee5\u901a\u8fc7XX:MaxPermSize\u6765\u8fdb\u884c\u8c03\u6574(\u8fd9\u91cc\u5c31\u4e0d\u8bf41.8\u4ee5\u524d\u7684\u6c38\u4e45\u4ee3\u4e86)\u3002<\/p>\n<h4 data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"margin-top: 30px;margin-bottom: 15px;font-weight: bold;font-size: 18px;max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">Stack Overflow<\/h4>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u6808\u5185\u5b58\u6ea2\u51fa\uff0c\u8fd9\u4e2a\u5927\u5bb6\u89c1\u5230\u4e5f\u6bd4\u8f83\u591a\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><code style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">Exception in thread \"main\" java.lang.StackOverflowError<\/code><\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u8868\u793a\u7ebf\u7a0b\u6808\u9700\u8981\u7684\u5185\u5b58\u5927\u4e8eXss\u503c\uff0c\u540c\u6837\u4e5f\u662f\u5148\u8fdb\u884c\u6392\u67e5\uff0c\u53c2\u6570\u65b9\u9762\u901a\u8fc7Xss\u6765\u8c03\u6574\uff0c\u4f46\u8c03\u6574\u7684\u592a\u5927\u53ef\u80fd\u53c8\u4f1a\u5f15\u8d77OOM\u3002<\/p>\n<h4 data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"margin-top: 30px;margin-bottom: 15px;font-weight: bold;font-size: 18px;max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u4f7f\u7528JMAP\u5b9a\u4f4d\u4ee3\u7801\u5185\u5b58\u6cc4\u6f0f<\/h4>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u4e0a\u8ff0\u5173\u4e8eOOM\u548cStackOverflow\u7684\u4ee3\u7801\u6392\u67e5\u65b9\u9762\uff0c\u6211\u4eec\u4e00\u822c\u4f7f\u7528JMAPjmap -dump:format=b,file=filename pid\u6765\u5bfc\u51fadump\u6587\u4ef6<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><img decoding=\"async\" class=\"lazyload\"data-backh=\"89\" data-backw=\"578\" data-ratio=\"0.15363881401617252\"  data-type=\"png\" data-w=\"742\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015159792.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"><noscript><img decoding=\"async\" data-backh=\"89\" data-backw=\"578\" data-ratio=\"0.15363881401617252\"  data-type=\"png\" data-w=\"742\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015159792.png\"><\/noscript><\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u901a\u8fc7mat(Eclipse Memory Analysis Tools)\u5bfc\u5165dump\u6587\u4ef6\u8fdb\u884c\u5206\u6790\uff0c\u5185\u5b58\u6cc4\u6f0f\u95ee\u9898\u4e00\u822c\u6211\u4eec\u76f4\u63a5\u9009Leak Suspects\u5373\u53ef\uff0cmat\u7ed9\u51fa\u4e86\u5185\u5b58\u6cc4\u6f0f\u7684\u5efa\u8bae\u3002\u53e6\u5916\u4e5f\u53ef\u4ee5\u9009\u62e9Top Consumers\u6765\u67e5\u770b\u6700\u5927\u5bf9\u8c61\u62a5\u544a\u3002\u548c\u7ebf\u7a0b\u76f8\u5173\u7684\u95ee\u9898\u53ef\u4ee5\u9009\u62e9thread overview\u8fdb\u884c\u5206\u6790\u3002\u9664\u6b64\u4e4b\u5916\u5c31\u662f\u9009\u62e9Histogram\u7c7b\u6982\u89c8\u6765\u81ea\u5df1\u6162\u6162\u5206\u6790\uff0c\u5927\u5bb6\u53ef\u4ee5\u641c\u641cmat\u7684\u76f8\u5173\u6559\u7a0b\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><img decoding=\"async\" class=\"lazyload\"data-backh=\"446\" data-backw=\"578\" data-ratio=\"0.7714932126696833\"  data-type=\"png\" data-w=\"1768\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015159609.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"><noscript><img decoding=\"async\" data-backh=\"446\" data-backw=\"578\" data-ratio=\"0.7714932126696833\"  data-type=\"png\" data-w=\"1768\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015159609.png\"><\/noscript><\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u65e5\u5e38\u5f00\u53d1\u4e2d\uff0c\u4ee3\u7801\u4ea7\u751f\u5185\u5b58\u6cc4\u6f0f\u662f\u6bd4\u8f83\u5e38\u89c1\u7684\u4e8b\uff0c\u5e76\u4e14\u6bd4\u8f83\u9690\u853d\uff0c\u9700\u8981\u5f00\u53d1\u8005\u66f4\u52a0\u5173\u6ce8\u7ec6\u8282\u3002\u6bd4\u5982\u8bf4\u6bcf\u6b21\u8bf7\u6c42\u90fdnew\u5bf9\u8c61\uff0c\u5bfc\u81f4\u5927\u91cf\u91cd\u590d\u521b\u5efa\u5bf9\u8c61\uff1b\u8fdb\u884c\u6587\u4ef6\u6d41\u64cd\u4f5c\u4f46\u672a\u6b63\u786e\u5173\u95ed\uff1b\u624b\u52a8\u4e0d\u5f53\u89e6\u53d1gc\uff1bByteBuffer\u7f13\u5b58\u5206\u914d\u4e0d\u5408\u7406\u7b49\u90fd\u4f1a\u9020\u6210\u4ee3\u7801OOM\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u53e6\u4e00\u65b9\u9762\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u542f\u52a8\u53c2\u6570\u4e2d\u6307\u5b9a<code style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">-XX:+HeapDumpOnOutOfMemoryError<\/code>\u6765\u4fdd\u5b58OOM\u65f6\u7684dump\u6587\u4ef6\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><span style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u641c\u7d22Java\u77e5\u97f3<\/span><span style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\uff0c<\/span><span style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u56de\u590d\u201c\u540e\u7aef\u9762\u8bd5<\/span><span style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u201d\uff0c\u9001\u4f60\u4e00\u4efd\u9762\u8bd5\u5b9d\u5178<\/span><span style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">.<\/span><span style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">pdf<\/span><span style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><\/span><\/p>\n<h4 data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"margin-top: 30px;margin-bottom: 15px;font-weight: bold;font-size: 18px;max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">gc\u95ee\u9898\u548c\u7ebf\u7a0b<\/h4>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">gc\u95ee\u9898\u9664\u4e86\u5f71\u54cdcpu\u4e5f\u4f1a\u5f71\u54cd\u5185\u5b58\uff0c\u6392\u67e5\u601d\u8def\u4e5f\u662f\u4e00\u81f4\u7684\u3002\u4e00\u822c\u5148\u4f7f\u7528jstat\u6765\u67e5\u770b\u5206\u4ee3\u53d8\u5316\u60c5\u51b5\uff0c\u6bd4\u5982youngGC\u6216\u8005fullGC\u6b21\u6570\u662f\u4e0d\u662f\u592a\u591a\u5440\uff1bEU\u3001OU\u7b49\u6307\u6807\u589e\u957f\u662f\u4e0d\u662f\u5f02\u5e38\u5440\u7b49\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u7ebf\u7a0b\u7684\u8bdd\u592a\u591a\u800c\u4e14\u4e0d\u88ab\u53ca\u65f6gc\u4e5f\u4f1a\u5f15\u53d1oom\uff0c\u5927\u90e8\u5206\u5c31\u662f\u4e4b\u524d\u8bf4\u7684unable to create new native thread\u3002\u9664\u4e86jstack\u7ec6\u7ec6\u5206\u6790dump\u6587\u4ef6\u5916\uff0c\u6211\u4eec\u4e00\u822c\u5148\u4f1a\u770b\u4e0b\u603b\u4f53\u7ebf\u7a0b\uff0c\u901a\u8fc7pstreee -p pid |wc -l\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><img decoding=\"async\" class=\"lazyload\"data-backh=\"72\" data-backw=\"454\" data-ratio=\"0.15859030837004406\"  data-type=\"png\" data-w=\"454\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015204722.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"><noscript><img decoding=\"async\" data-backh=\"72\" data-backw=\"454\" data-ratio=\"0.15859030837004406\"  data-type=\"png\" data-w=\"454\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015204722.png\"><\/noscript><\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u6216\u8005\u76f4\u63a5\u901a\u8fc7\u67e5\u770b\/proc\/pid\/task\u7684\u6570\u91cf\u5373\u4e3a\u7ebf\u7a0b\u6570\u91cf\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><img decoding=\"async\" class=\"lazyload\"data-backh=\"66\" data-backw=\"518\" data-ratio=\"0.1274131274131274\"  data-type=\"png\" data-w=\"518\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015204358.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"><noscript><img decoding=\"async\" data-backh=\"66\" data-backw=\"518\" data-ratio=\"0.1274131274131274\"  data-type=\"png\" data-w=\"518\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015204358.png\"><\/noscript><\/p>\n<h3 data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"margin-top: 30px;margin-bottom: 15px;font-weight: bold;font-size: 20px;max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u5806\u5916\u5185\u5b58<\/h3>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u5982\u679c\u78b0\u5230\u5806\u5916\u5185\u5b58\u6ea2\u51fa\uff0c\u90a3\u53ef\u771f\u662f\u592a\u4e0d\u5e78\u4e86\u3002\u9996\u5148\u5806\u5916\u5185\u5b58\u6ea2\u51fa\u8868\u73b0\u5c31\u662f\u7269\u7406\u5e38\u9a7b\u5185\u5b58\u589e\u957f\u5feb\uff0c\u62a5\u9519\u7684\u8bdd\u89c6\u4f7f\u7528\u65b9\u5f0f\u90fd\u4e0d\u786e\u5b9a\uff0c\u5982\u679c\u7531\u4e8e\u4f7f\u7528Netty\u5bfc\u81f4\u7684\uff0c\u90a3\u9519\u8bef\u65e5\u5fd7\u91cc\u53ef\u80fd\u4f1a\u51fa\u73b0OutOfDirectMemoryError\u9519\u8bef\uff0c\u5982\u679c\u76f4\u63a5\u662fDirectByteBuffer\uff0c\u90a3\u4f1a\u62a5<code style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">OutOfMemoryError: Direct buffer memory<\/code>\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u5806\u5916\u5185\u5b58\u6ea2\u51fa\u5f80\u5f80\u662f\u548cNIO\u7684\u4f7f\u7528\u76f8\u5173\uff0c\u4e00\u822c\u6211\u4eec\u5148\u901a\u8fc7pmap\u6765\u67e5\u770b\u4e0b\u8fdb\u7a0b\u5360\u7528\u7684\u5185\u5b58\u60c5\u51b5pmap -x pid | sort -rn -k3 | head -30\uff0c\u8fd9\u6bb5\u610f\u601d\u662f\u67e5\u770b\u5bf9\u5e94pid\u5012\u5e8f\u524d30\u5927\u7684\u5185\u5b58\u6bb5\u3002\u8fd9\u8fb9\u53ef\u4ee5\u518d\u4e00\u6bb5\u65f6\u95f4\u540e\u518d\u8dd1\u4e00\u6b21\u547d\u4ee4\u770b\u770b\u5185\u5b58\u589e\u957f\u60c5\u51b5\uff0c\u6216\u8005\u548c\u6b63\u5e38\u673a\u5668\u6bd4\u8f83\u53ef\u7591\u7684\u5185\u5b58\u6bb5\u5728\u54ea\u91cc\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><img decoding=\"async\" class=\"lazyload\"data-backh=\"637\" data-backw=\"578\" data-ratio=\"1.101761252446184\"  data-type=\"png\" data-w=\"1022\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015205746.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"><noscript><img decoding=\"async\" data-backh=\"637\" data-backw=\"578\" data-ratio=\"1.101761252446184\"  data-type=\"png\" data-w=\"1022\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015205746.png\"><\/noscript><\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u6211\u4eec\u5982\u679c\u786e\u5b9a\u6709\u53ef\u7591\u7684\u5185\u5b58\u7aef\uff0c\u9700\u8981\u901a\u8fc7gdb\u6765\u5206\u6790gdb --batch --pid {pid} -ex \"dump memory filename.dump {\u5185\u5b58\u8d77\u59cb\u5730\u5740} {\u5185\u5b58\u8d77\u59cb\u5730\u5740+\u5185\u5b58\u5757\u5927\u5c0f}\"<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><img decoding=\"async\" class=\"lazyload\"data-backh=\"19\" data-backw=\"578\" data-ratio=\"0.032904148783977114\"  data-type=\"png\" data-w=\"1398\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015216788.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"><noscript><img decoding=\"async\" data-backh=\"19\" data-backw=\"578\" data-ratio=\"0.032904148783977114\"  data-type=\"png\" data-w=\"1398\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015216788.png\"><\/noscript><\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u83b7\u53d6dump\u6587\u4ef6\u540e\u53ef\u7528heaxdump\u8fdb\u884c\u67e5\u770bhexdump -C filename | less\uff0c\u4e0d\u8fc7\u5927\u591a\u6570\u770b\u5230\u7684\u90fd\u662f\u4e8c\u8fdb\u5236\u4e71\u7801\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">NMT\u662fJava7U40\u5f15\u5165\u7684HotSpot\u65b0\u7279\u6027\uff0c\u914d\u5408jcmd\u547d\u4ee4\u6211\u4eec\u5c31\u53ef\u4ee5\u770b\u5230\u5177\u4f53\u5185\u5b58\u7ec4\u6210\u4e86\u3002\u9700\u8981\u5728\u542f\u52a8\u53c2\u6570\u4e2d\u52a0\u5165<span>&nbsp;<\/span><code style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">-XX:NativeMemoryTracking=summary<\/code><span>&nbsp;<\/span>\u6216\u8005<span>&nbsp;<\/span><code style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">-XX:NativeMemoryTracking=detail<\/code>\uff0c\u4f1a\u6709\u7565\u5fae\u6027\u80fd\u635f\u8017\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u4e00\u822c\u5bf9\u4e8e\u5806\u5916\u5185\u5b58\u7f13\u6162\u589e\u957f\u76f4\u5230\u7206\u70b8\u7684\u60c5\u51b5\u6765\u8bf4\uff0c\u53ef\u4ee5\u5148\u8bbe\u4e00\u4e2a\u57fa\u7ebfjcmd pid VM.native_memory baseline\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><img decoding=\"async\" class=\"lazyload\"data-backh=\"95\" data-backw=\"578\" data-ratio=\"0.16521739130434782\"  data-type=\"png\" data-w=\"690\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015217450.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"><noscript><img decoding=\"async\" data-backh=\"95\" data-backw=\"578\" data-ratio=\"0.16521739130434782\"  data-type=\"png\" data-w=\"690\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015217450.png\"><\/noscript><\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u7136\u540e\u7b49\u653e\u4e00\u6bb5\u65f6\u95f4\u540e\u518d\u53bb\u770b\u770b\u5185\u5b58\u589e\u957f\u7684\u60c5\u51b5\uff0c\u901a\u8fc7jcmd pid VM.native_memory detail.diff(summary.diff)\u505a\u4e00\u4e0bsummary\u6216\u8005detail\u7ea7\u522b\u7684diff\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><img decoding=\"async\" class=\"lazyload\"data-backh=\"45\" data-backw=\"578\" data-ratio=\"0.07836990595611286\"  data-type=\"png\" data-w=\"638\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015217775.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"><noscript><img decoding=\"async\" data-backh=\"45\" data-backw=\"578\" data-ratio=\"0.07836990595611286\"  data-type=\"png\" data-w=\"638\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015217775.png\"><\/noscript><\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><img decoding=\"async\" class=\"lazyload\"data-backh=\"602\" data-backw=\"578\" data-ratio=\"1.0414438502673797\"  data-type=\"png\" data-w=\"1496\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015218251.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"><noscript><img decoding=\"async\" data-backh=\"602\" data-backw=\"578\" data-ratio=\"1.0414438502673797\"  data-type=\"png\" data-w=\"1496\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015218251.png\"><\/noscript><\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u53ef\u4ee5\u770b\u5230jcmd\u5206\u6790\u51fa\u6765\u7684\u5185\u5b58\u5341\u5206\u8be6\u7ec6\uff0c\u5305\u62ec\u5806\u5185\u3001\u7ebf\u7a0b\u4ee5\u53cagc(\u6240\u4ee5\u4e0a\u8ff0\u5176\u4ed6\u5185\u5b58\u5f02\u5e38\u5176\u5b9e\u90fd\u53ef\u4ee5\u7528nmt\u6765\u5206\u6790)\uff0c\u8fd9\u8fb9\u5806\u5916\u5185\u5b58\u6211\u4eec\u91cd\u70b9\u5173\u6ce8Internal\u7684\u5185\u5b58\u589e\u957f\uff0c\u5982\u679c\u589e\u957f\u5341\u5206\u660e\u663e\u7684\u8bdd\u90a3\u5c31\u662f\u6709\u95ee\u9898\u4e86\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">detail\u7ea7\u522b\u7684\u8bdd\u8fd8\u4f1a\u6709\u5177\u4f53\u5185\u5b58\u6bb5\u7684\u589e\u957f\u60c5\u51b5\uff0c\u5982\u4e0b\u56fe\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><img decoding=\"async\" class=\"lazyload\"data-backh=\"74\" data-backw=\"578\" data-ratio=\"0.12780656303972365\"  data-type=\"png\" data-w=\"1158\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015226566.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"><noscript><img decoding=\"async\" data-backh=\"74\" data-backw=\"578\" data-ratio=\"0.12780656303972365\"  data-type=\"png\" data-w=\"1158\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015226566.png\"><\/noscript><\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u6b64\u5916\u5728\u7cfb\u7edf\u5c42\u9762\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u4f7f\u7528strace\u547d\u4ee4\u6765\u76d1\u63a7\u5185\u5b58\u5206\u914d strace -f -e \"brk,mmap,munmap\" -p pid<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u8fd9\u8fb9\u5185\u5b58\u5206\u914d\u4fe1\u606f\u4e3b\u8981\u5305\u62ec\u4e86pid\u548c\u5185\u5b58\u5730\u5740\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><img decoding=\"async\" class=\"lazyload\"data-backh=\"173\" data-backw=\"578\" data-ratio=\"0.29959514170040485\"  data-type=\"jpeg\" data-w=\"1482\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015228584.jpeg\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"><noscript><img decoding=\"async\" data-backh=\"173\" data-backw=\"578\" data-ratio=\"0.29959514170040485\"  data-type=\"jpeg\" data-w=\"1482\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015228584.jpeg\"><\/noscript><\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u4e0d\u8fc7\u5176\u5b9e\u4e0a\u9762\u90a3\u4e9b\u64cd\u4f5c\u4e5f\u5f88\u96be\u5b9a\u4f4d\u5230\u5177\u4f53\u7684\u95ee\u9898\u70b9\uff0c\u5173\u952e\u8fd8\u662f\u8981\u770b\u9519\u8bef\u65e5\u5fd7\u6808\uff0c\u627e\u5230\u53ef\u7591\u7684\u5bf9\u8c61\uff0c\u641e\u6e05\u695a\u5b83\u7684\u56de\u6536\u673a\u5236\uff0c\u7136\u540e\u53bb\u5206\u6790\u5bf9\u5e94\u7684\u5bf9\u8c61\u3002\u6bd4\u5982DirectByteBuffer\u5206\u914d\u5185\u5b58\u7684\u8bdd\uff0c\u662f\u9700\u8981full GC\u6216\u8005\u624b\u52a8system.gc\u6765\u8fdb\u884c\u56de\u6536\u7684(\u6240\u4ee5\u6700\u597d\u4e0d\u8981\u4f7f\u7528-XX:+DisableExplicitGC)\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u90a3\u4e48\u5176\u5b9e\u6211\u4eec\u53ef\u4ee5\u8ddf\u8e2a\u4e00\u4e0bDirectByteBuffer\u5bf9\u8c61\u7684\u5185\u5b58\u60c5\u51b5\uff0c\u901a\u8fc7jmap -histo:live pid\u624b\u52a8\u89e6\u53d1fullGC\u6765\u770b\u770b\u5806\u5916\u5185\u5b58\u6709\u6ca1\u6709\u88ab\u56de\u6536\u3002\u5982\u679c\u88ab\u56de\u6536\u4e86\uff0c\u90a3\u4e48\u5927\u6982\u7387\u662f\u5806\u5916\u5185\u5b58\u672c\u8eab\u5206\u914d\u7684\u592a\u5c0f\u4e86\uff0c\u901a\u8fc7-XX:MaxDirectMemorySize\u8fdb\u884c\u8c03\u6574\u3002\u5982\u679c\u6ca1\u6709\u4ec0\u4e48\u53d8\u5316\uff0c\u90a3\u5c31\u8981\u4f7f\u7528jmap\u53bb\u5206\u6790\u90a3\u4e9b\u4e0d\u80fd\u88abgc\u7684\u5bf9\u8c61\uff0c\u4ee5\u53ca\u548cDirectByteBuffer\u4e4b\u95f4\u7684\u5f15\u7528\u5173\u7cfb\u4e86\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><span style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u641c\u7d22Java\u77e5\u97f3<\/span><span style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\uff0c<\/span><span style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u56de\u590d\u201c\u540e\u7aef\u9762\u8bd5<\/span><span style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u201d\uff0c\u9001\u4f60\u4e00\u4efd\u9762\u8bd5\u5b9d\u5178<\/span><span style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">.<\/span><span style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">pdf<\/span><span style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><\/span><\/p>\n<h2 data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"margin-top: 30px;margin-bottom: 15px;font-weight: bold;font-size: 1.3em;max-width: 100%;border-bottom: 2px solid rgb(239, 112, 96);box-sizing: border-box !important;overflow-wrap: break-word !important;\"><span style=\"margin-right: 3px;padding: 3px 10px 1px;max-width: 100%;display: inline-block;background: rgb(239, 112, 96);color: rgb(255, 255, 255);border-top-right-radius: 3px;border-top-left-radius: 3px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">GC\u95ee\u9898<\/span><span style=\"max-width: 100%;display: inline-block;vertical-align: bottom;border-bottom: 36px solid rgb(239, 235, 233);border-right: 20px solid transparent;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><\/span><\/h2>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u5806\u5185\u5185\u5b58\u6cc4\u6f0f\u603b\u662f\u548cGC\u5f02\u5e38\u76f8\u4f34\u3002\u4e0d\u8fc7GC\u95ee\u9898\u4e0d\u53ea\u662f\u548c\u5185\u5b58\u95ee\u9898\u76f8\u5173\uff0c\u8fd8\u6709\u53ef\u80fd\u5f15\u8d77CPU\u8d1f\u8f7d\u3001\u7f51\u7edc\u95ee\u9898\u7b49\u7cfb\u5217\u5e76\u53d1\u75c7\uff0c\u53ea\u662f\u76f8\u5bf9\u6765\u8bf4\u548c\u5185\u5b58\u8054\u7cfb\u7d27\u5bc6\u4e9b\uff0c\u6240\u4ee5\u6211\u4eec\u5728\u6b64\u5355\u72ec\u603b\u7ed3\u4e00\u4e0bGC\u76f8\u5173\u95ee\u9898\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u6211\u4eec\u5728cpu\u7ae0\u4ecb\u7ecd\u4e86\u4f7f\u7528jstat\u6765\u83b7\u53d6\u5f53\u524dGC\u5206\u4ee3\u53d8\u5316\u4fe1\u606f\u3002\u800c\u66f4\u591a\u65f6\u5019\uff0c\u6211\u4eec\u662f\u901a\u8fc7GC\u65e5\u5fd7\u6765\u6392\u67e5\u95ee\u9898\u7684\uff0c\u5728\u542f\u52a8\u53c2\u6570\u4e2d\u52a0\u4e0a<code style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">-verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintGCTimeStamps<\/code>\u6765\u5f00\u542fGC\u65e5\u5fd7\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u5e38\u89c1\u7684Young GC\u3001Full GC\u65e5\u5fd7\u542b\u4e49\u5728\u6b64\u5c31\u4e0d\u505a\u8d58\u8ff0\u4e86\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u9488\u5bf9gc\u65e5\u5fd7\uff0c\u6211\u4eec\u5c31\u80fd\u5927\u81f4\u63a8\u65ad\u51fayoungGC\u4e0efullGC\u662f\u5426\u8fc7\u4e8e\u9891\u7e41\u6216\u8005\u8017\u65f6\u8fc7\u957f\uff0c\u4ece\u800c\u5bf9\u75c7\u4e0b\u836f\u3002\u6211\u4eec\u4e0b\u9762\u5c06\u5bf9G1\u5783\u573e\u6536\u96c6\u5668\u6765\u505a\u5206\u6790\uff0c\u8fd9\u8fb9\u4e5f\u5efa\u8bae\u5927\u5bb6\u4f7f\u7528G1-XX:+UseG1GC\u3002<\/p>\n<h3 data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"margin-top: 30px;margin-bottom: 15px;font-weight: bold;font-size: 20px;max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">youngGC\u8fc7\u9891\u7e41<\/h3>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">youngGC\u9891\u7e41\u4e00\u822c\u662f\u77ed\u5468\u671f\u5c0f\u5bf9\u8c61\u8f83\u591a\uff0c\u5148\u8003\u8651\u662f\u4e0d\u662fEden\u533a\/\u65b0\u751f\u4ee3\u8bbe\u7f6e\u7684\u592a\u5c0f\u4e86\uff0c\u770b\u80fd\u5426\u901a\u8fc7\u8c03\u6574-Xmn\u3001-XX:SurvivorRatio\u7b49\u53c2\u6570\u8bbe\u7f6e\u6765\u89e3\u51b3\u95ee\u9898\u3002\u5982\u679c\u53c2\u6570\u6b63\u5e38\uff0c\u4f46\u662fyoung gc\u9891\u7387\u8fd8\u662f\u592a\u9ad8\uff0c\u5c31\u9700\u8981\u4f7f\u7528Jmap\u548cMAT\u5bf9dump\u6587\u4ef6\u8fdb\u884c\u8fdb\u4e00\u6b65\u6392\u67e5\u4e86\u3002<\/p>\n<h3 data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"margin-top: 30px;margin-bottom: 15px;font-weight: bold;font-size: 20px;max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">youngGC\u8017\u65f6\u8fc7\u957f<\/h3>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u8017\u65f6\u8fc7\u957f\u95ee\u9898\u5c31\u8981\u770bGC\u65e5\u5fd7\u91cc\u8017\u65f6\u8017\u5728\u54ea\u4e00\u5757\u4e86\u3002\u4ee5G1\u65e5\u5fd7\u4e3a\u4f8b\uff0c\u53ef\u4ee5\u5173\u6ce8Root Scanning\u3001Object Copy\u3001Ref Proc\u7b49\u9636\u6bb5\u3002Ref Proc\u8017\u65f6\u957f\uff0c\u5c31\u8981\u6ce8\u610f\u5f15\u7528\u76f8\u5173\u7684\u5bf9\u8c61\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">Root Scanning\u8017\u65f6\u957f\uff0c\u5c31\u8981\u6ce8\u610f\u7ebf\u7a0b\u6570\u3001\u8de8\u4ee3\u5f15\u7528\u3002Object Copy\u5219\u9700\u8981\u5173\u6ce8\u5bf9\u8c61\u751f\u5b58\u5468\u671f\u3002\u800c\u4e14\u8017\u65f6\u5206\u6790\u5b83\u9700\u8981\u6a2a\u5411\u6bd4\u8f83\uff0c\u5c31\u662f\u548c\u5176\u4ed6\u9879\u76ee\u6216\u8005\u6b63\u5e38\u65f6\u95f4\u6bb5\u7684\u8017\u65f6\u6bd4\u8f83\u3002\u6bd4\u5982\u8bf4\u56fe\u4e2d\u7684Root Scanning\u548c\u6b63\u5e38\u65f6\u95f4\u6bb5\u6bd4\u589e\u957f\u8f83\u591a\uff0c\u90a3\u5c31\u662f\u8d77\u7684\u7ebf\u7a0b\u592a\u591a\u4e86\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><img decoding=\"async\" class=\"lazyload\"data-backh=\"423\" data-backw=\"578\" data-ratio=\"0.731457800511509\"  data-type=\"png\" data-w=\"1564\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015229217.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"><noscript><img decoding=\"async\" data-backh=\"423\" data-backw=\"578\" data-ratio=\"0.731457800511509\"  data-type=\"png\" data-w=\"1564\" style=\"box-sizing: border-box !important;overflow-wrap: break-word !important;width: 100%;visibility: visible !important;height: auto;\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015229217.png\"><\/noscript><\/p>\n<h3 data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"margin-top: 30px;margin-bottom: 15px;font-weight: bold;font-size: 20px;max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u89e6\u53d1fullGC<\/h3>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">G1\u4e2d\u66f4\u591a\u7684\u8fd8\u662fmixedGC\uff0c\u4f46mixedGC\u53ef\u4ee5\u548cyoungGC\u601d\u8def\u4e00\u6837\u53bb\u6392\u67e5\u3002\u89e6\u53d1fullGC\u4e86\u4e00\u822c\u90fd\u4f1a\u6709\u95ee\u9898\uff0cG1\u4f1a\u9000\u5316\u4f7f\u7528Serial\u6536\u96c6\u5668\u6765\u5b8c\u6210\u5783\u573e\u7684\u6e05\u7406\u5de5\u4f5c\uff0c\u6682\u505c\u65f6\u957f\u8fbe\u5230\u79d2\u7ea7\u522b\uff0c\u53ef\u4ee5\u8bf4\u662f\u534a\u8dea\u4e86\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">fullGC\u7684\u539f\u56e0\u53ef\u80fd\u5305\u62ec\u4ee5\u4e0b\u8fd9\u4e9b\uff0c\u4ee5\u53ca\u53c2\u6570\u8c03\u6574\u65b9\u9762\u7684\u4e00\u4e9b\u601d\u8def\uff1a<\/p>\n<ul data-tool=\"mdnice\u7f16\u8f91\u5668\" class=\"list-paddingleft-2\" style=\"margin-top: 8px;margin-bottom: 8px;padding-left: 25px;max-width: 100%;overflow-wrap: break-word !important;\">\n<li style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\n<section style=\"margin-top: 5px;margin-bottom: 5px;max-width: 100%;line-height: 26px;color: rgb(1, 1, 1);box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u5e76\u53d1\u9636\u6bb5\u5931\u8d25\uff1a\u5728\u5e76\u53d1\u6807\u8bb0\u9636\u6bb5\uff0cMixGC\u4e4b\u524d\u8001\u5e74\u4ee3\u5c31\u88ab\u586b\u6ee1\u4e86\uff0c\u90a3\u4e48\u8fd9\u65f6\u5019G1\u5c31\u4f1a\u653e\u5f03\u6807\u8bb0\u5468\u671f\u3002\u8fd9\u79cd\u60c5\u51b5\uff0c\u53ef\u80fd\u5c31\u9700\u8981\u589e\u52a0\u5806\u5927\u5c0f\uff0c\u6216\u8005\u8c03\u6574\u5e76\u53d1\u6807\u8bb0\u7ebf\u7a0b\u6570-XX:ConcGCThreads\u3002<\/section>\n<\/li>\n<li style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\n<section style=\"margin-top: 5px;margin-bottom: 5px;max-width: 100%;line-height: 26px;color: rgb(1, 1, 1);box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u664b\u5347\u5931\u8d25\uff1a\u5728GC\u7684\u65f6\u5019\u6ca1\u6709\u8db3\u591f\u7684\u5185\u5b58\u4f9b\u5b58\u6d3b\/\u664b\u5347\u5bf9\u8c61\u4f7f\u7528\uff0c\u6240\u4ee5\u89e6\u53d1\u4e86Full GC\u3002\u8fd9\u65f6\u5019\u53ef\u4ee5\u901a\u8fc7-XX:G1ReservePercent\u6765\u589e\u52a0\u9884\u7559\u5185\u5b58\u767e\u5206\u6bd4\uff0c\u51cf\u5c11-XX:InitiatingHeapOccupancyPercent\u6765\u63d0\u524d\u542f\u52a8\u6807\u8bb0\uff0c-XX:ConcGCThreads\u6765\u589e\u52a0\u6807\u8bb0\u7ebf\u7a0b\u6570\u4e5f\u662f\u53ef\u4ee5\u7684\u3002<\/section>\n<\/li>\n<li style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\n<section style=\"margin-top: 5px;margin-bottom: 5px;max-width: 100%;line-height: 26px;color: rgb(1, 1, 1);box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u5927\u5bf9\u8c61\u5206\u914d\u5931\u8d25\uff1a\u5927\u5bf9\u8c61\u627e\u4e0d\u5230\u5408\u9002\u7684region\u7a7a\u95f4\u8fdb\u884c\u5206\u914d\uff0c\u5c31\u4f1a\u8fdb\u884cfullGC\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\u53ef\u4ee5\u589e\u5927\u5185\u5b58\u6216\u8005\u589e\u5927-XX:G1HeapRegionSize\u3002<\/section>\n<\/li>\n<li style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\n<section style=\"margin-top: 5px;margin-bottom: 5px;max-width: 100%;line-height: 26px;color: rgb(1, 1, 1);box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u7a0b\u5e8f\u4e3b\u52a8\u6267\u884cSystem.gc()\uff1a\u4e0d\u8981\u968f\u4fbf\u5199\u5c31\u5bf9\u4e86\u3002<\/section>\n<\/li>\n<\/ul>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u53e6\u5916\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u542f\u52a8\u53c2\u6570\u4e2d\u914d\u7f6e-XX:HeapDumpPath=\/xxx\/dump.hprof\u6765dump fullGC\u76f8\u5173\u7684\u6587\u4ef6\uff0c\u5e76\u901a\u8fc7jinfo\u6765\u8fdb\u884cgc\u524d\u540e\u7684dump<\/p>\n<pre data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"margin-top: 10px;margin-bottom: 10px;max-width: 100%;border-radius: 5px;box-shadow: rgba(0, 0, 0, 0.55) 0px 2px 10px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><span style=\"margin-bottom: -7px;max-width: 100%;display: block;background: url(&quot;https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015247659.png&quot;) 10px 10px \/ 40px no-repeat rgb(39, 40, 34);height: 30px;width: 677px;border-radius: 5px;box-sizing: border-box !important;overflow-wrap: break-word !important;\" data-remoteid=\"c1598412861352\"><\/span><code style=\"padding: 15px 16px 16px;max-width: 100%;overflow-x: auto;color: rgb(221, 221, 221);display: -webkit-box;font-family: &quot;Operator Mono&quot;, Consolas, Monaco, Menlo, monospace;font-size: 12px;background: rgb(39, 40, 34);border-radius: 5px;box-sizing: border-box !important;overflow-wrap: break-word !important;\"><span style=\"max-width: 100%;color: rgb(117, 113, 94);line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">#\u8868\u793a\u5f00\u542f\u91cd\u7528\u3002\u5141\u8bb8\u5c06TIME-WAIT sockets\u91cd\u65b0\u7528\u4e8e\u65b0\u7684TCP\u8fde\u63a5\uff0c\u9ed8\u8ba4\u4e3a0\uff0c\u8868\u793a\u5173\u95ed<\/span><br style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\"  \/>net.ipv4.tcp_tw_reuse&nbsp;=&nbsp;1<br style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\"  \/><span style=\"max-width: 100%;color: rgb(117, 113, 94);line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">#\u8868\u793a\u5f00\u542fTCP\u8fde\u63a5\u4e2dTIME-WAIT&nbsp;sockets\u7684\u5feb\u901f\u56de\u6536\uff0c\u9ed8\u8ba4\u4e3a0\uff0c\u8868\u793a\u5173\u95ed<\/span><br style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\"  \/>net.ipv4.tcp_tw_recycle&nbsp;=&nbsp;1<br style=\"max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\"  \/><\/code><\/pre>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u5f53\u7136\u6211\u4eec\u4e0d\u8981\u5fd8\u8bb0\u5728NAT\u73af\u5883\u4e0b\u56e0\u4e3a\u65f6\u95f4\u6233\u9519\u4e71\u5bfc\u81f4\u6570\u636e\u5305\u88ab\u62d2\u7edd\u7684\u5751\u4e86\uff0c\u53e6\u5916\u7684\u529e\u6cd5\u5c31\u662f\u6539\u5c0ftcp_max_tw_buckets\uff0c\u8d85\u8fc7\u8fd9\u4e2a\u6570\u7684time_wait\u90fd\u4f1a\u88ab\u5e72\u6389\uff0c\u4e0d\u8fc7\u8fd9\u4e5f\u4f1a\u5bfc\u81f4\u62a5time wait bucket table overflow\u7684\u9519\u3002<\/p>\n<h3 data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"margin-top: 30px;margin-bottom: 15px;font-weight: bold;font-size: 20px;max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;\">CLOSE_WAIT<\/h3>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">close_wait\u5f80\u5f80\u90fd\u662f\u56e0\u4e3a\u5e94\u7528\u7a0b\u5e8f\u5199\u7684\u6709\u95ee\u9898\uff0c\u6ca1\u6709\u5728ACK\u540e\u518d\u6b21\u53d1\u8d77FIN\u62a5\u6587\u3002close_wait\u51fa\u73b0\u7684\u6982\u7387\u751a\u81f3\u6bd4time_wait\u8981\u66f4\u9ad8\uff0c\u540e\u679c\u4e5f\u66f4\u4e25\u91cd\u3002\u5f80\u5f80\u662f\u7531\u4e8e\u67d0\u4e2a\u5730\u65b9\u963b\u585e\u4f4f\u4e86\uff0c\u6ca1\u6709\u6b63\u5e38\u5173\u95ed\u8fde\u63a5\uff0c\u4ece\u800c\u6e10\u6e10\u5730\u6d88\u8017\u5b8c\u6240\u6709\u7684\u7ebf\u7a0b\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u60f3\u8981\u5b9a\u4f4d\u8fd9\u7c7b\u95ee\u9898\uff0c\u6700\u597d\u662f\u901a\u8fc7jstack\u6765\u5206\u6790\u7ebf\u7a0b\u5806\u6808\u6765\u6392\u67e5\u95ee\u9898\uff0c\u5177\u4f53\u53ef\u53c2\u8003\u4e0a\u8ff0\u7ae0\u8282\u3002\u8fd9\u91cc\u4ec5\u4e3e\u4e00\u4e2a\u4f8b\u5b50\u3002<\/p>\n<p data-tool=\"mdnice\u7f16\u8f91\u5668\" style=\"padding-top: 8px;padding-bottom: 8px;max-width: 100%;min-height: 1em;line-height: 26px;box-sizing: border-box !important;overflow-wrap: break-word !important;\">\u5f00\u53d1\u540c\u5b66\u8bf4\u5e94\u7528\u4e0a\u7ebf\u540eCLOSE_WAIT\u5c31\u4e00\u76f4\u589e\u591a\uff0c\u76f4\u5230\u6302\u6389\u4e3a\u6b62\uff0cjstack\u540e\u627e\u5230\u6bd4\u8f83\u53ef\u7591\u7684\u5806\u6808\u662f\u5927\u90e8\u5206\u7ebf\u7a0b\u90fd\u5361\u5728\u4e86countdownlatch.await\u65b9\u6cd5\uff0c\u627e\u5f00\u53d1\u540c\u5b66\u4e86\u89e3\u540e\u5f97\u77e5\u4f7f\u7528\u4e86\u591a\u7ebf\u7a0b\u4f46\u662f\u786e\u6ca1\u6709catch\u5f02\u5e38\uff0c\u4fee\u6539\u540e\u53d1\u73b0\u5f02\u5e38\u4ec5\u4ec5\u662f\u6700\u7b80\u5355\u7684\u5347\u7ea7sdk\u540e\u5e38\u51fa\u73b0\u7684class not found\u3002<\/p>\n<\/section>\n<section><mpcps frameborder=\"0\" class=\"js_editor_cps\" data-datakey=\"1598412861261_0.031088956699088843\" style=\"width:100% !important;border:0;\" data-uid=\"1598412861260\" data-type=\"1\" data-product=\"\" data-templateid=\"list\" data-pid=\"346210\" data-packid=\"\" data-smartnum=\"\" data-color=\"#fa7834\" data-categoryid=\"2\" data-appid=\"wx47b90707741b8fd2\" data-report=\"s0%3D2%26s1%3D0%26s2%3D1%26s3%3D%26s4%3D0%26s5%3D10%26s6%3Did_1598420848091_231866%26s7%3D%26s8%3D%26s9%3D%26s10%3D%26pid%3Dwx47b90707741b8fd2_346210%26uuid%3D38920080341807778562%26title%3D%25E5%2585%25AB%25E4%25BD%25B0%26sid%3D2%26cid%3D2%26ratio%3D6.00%2525%26price%3D0.00%26\"><\/mpcps><\/section>\n<p style=\"max-width: 100%;box-sizing: border-box;min-height: 1em;word-wrap: break-word !important;\"><br  \/><\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<p style=\"max-width: 100%;min-height: 1em;color: rgb(62, 62, 62);font-size: 16px;white-space: normal;background-color: rgb(255, 255, 255);box-sizing: border-box !important;word-wrap: break-word !important;\"><br style=\"max-width: 100%;box-sizing: border-box !important;word-wrap: break-word !important;\"  \/><\/p>\n<p style=\"white-space: normal;\">\u5f80\u671f\u5185\u5bb9\uff1a<br  \/><\/p>\n<ul class=\"list-paddingleft-2\" style=\"list-style-type: square;\">\n<li>\n<p style=\"white-space: normal;\"><a target=\"_blank\" href=\"http:\/\/mp.weixin.qq.com\/s?__biz=Mzg5MjAwODAzNA==&amp;mid=2247483820&amp;idx=1&amp;sn=5f4035edba637208d540317cce00762a&amp;chksm=cfc5e2a1f8b26bb76bebe8f52c9a660f39cde77183751abe50ffc05620e174264cfd4ad64a3d&amp;scene=21#wechat_redirect\" data-itemshowtype=\"0\" tab=\"innerlink\" data-linktype=\"2\" rel=\"noopener\" rel=\"nofollow\" >solr\u5b89\u88c5\u4e0e\u914d\u7f6e<\/a><br  \/><\/p>\n<\/li>\n<li>\n<p style=\"white-space: normal;\"><a target=\"_blank\" href=\"http:\/\/mp.weixin.qq.com\/s?__biz=Mzg5MjAwODAzNA==&amp;mid=2247483795&amp;idx=1&amp;sn=c96f591a8a74f67c9ccf685f9950d596&amp;chksm=cfc5e29ef8b26b8894fb4616c0bfaecb2df717e8a8e6959985abbc51509d47d09db77507dd25&amp;scene=21#wechat_redirect\" data-itemshowtype=\"0\" tab=\"innerlink\" data-linktype=\"2\" rel=\"noopener\" rel=\"nofollow\" >redis\u96c6\u7fa4\u642d\u5efa<\/a><br  \/><\/p>\n<\/li>\n<li>\n<p style=\"white-space: normal;\"><a target=\"_blank\" href=\"http:\/\/mp.weixin.qq.com\/s?__biz=Mzg5MjAwODAzNA==&amp;mid=2247483765&amp;idx=1&amp;sn=29a0bf191677960d3a46e8396c1d357f&amp;chksm=cfc5e278f8b26b6e6dcb24718f0453a153a2781457cc4b856e0a8612ca52190e68f3ae1dc4a5&amp;scene=21#wechat_redirect\" data-itemshowtype=\"0\" tab=\"innerlink\" data-linktype=\"2\" rel=\"noopener\" rel=\"nofollow\" >nginx\u5b89\u88c5\u624b\u518c<\/a><br  \/><\/p>\n<\/li>\n<\/ul>\n<p style=\"white-space: normal;\"><br  \/><\/p>\n<p style=\"white-space: normal;\">\u626b\u63cf\u4e0b\u65b9\u4e8c\u7ef4\u7801\uff0c\u5173\u6ce8\u56de\u590d666\uff0c\u6709\u60ca\u559c\u54e6\uff01<img decoding=\"async\" class=\"lazyload\"data-ratio=\"1\"  data-type=\"png\" data-w=\"20\" style=\"display: inline-block;width: 20px;vertical-align: text-bottom;\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015244413.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"><noscript><img 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data-ratio=\"0.2778649921507064\"  data-type=\"gif\" data-w=\"637\" style=\"\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015246997.gif\"  \/><\/noscript><\/p>\n<p style=\"text-align: center;\"><img decoding=\"async\" class=\"rich_pages lazyload\" data-ratio=\"1\" data-s=\"300,640\"  data-type=\"jpeg\" data-w=\"258\" style=\"\" data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015246491.jpeg\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\"  \/><noscript><img decoding=\"async\" class=\"rich_pages\" data-ratio=\"1\" data-s=\"300,640\"  data-type=\"jpeg\" data-w=\"258\" style=\"\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528015246491.jpeg\"  \/><\/noscript><\/p>\n<p><br  \/><\/p>\n<p><br  \/><\/p>\n<blockquote>\n<p>\u672c\u7bc7\u6587\u7ae0\u6765\u6e90\u4e8e\u5fae\u4fe1\u516c\u4f17\u53f7:                 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