{"id":11268,"date":"2023-11-28T21:57:51","date_gmt":"2023-11-28T13:57:51","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=11268"},"modified":"2023-12-08T11:27:15","modified_gmt":"2023-12-08T03:27:15","slug":"jvm-zhong-shen-me-shi-hou-hui-chu-fafullgc","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/jvm-zhong-shen-me-shi-hou-hui-chu-fafullgc\/","title":{"rendered":"JVM\u4e2d\u4ec0\u4e48\u65f6\u5019\u4f1a\u89e6\u53d1FullGC"},"content":{"rendered":"

Full GC\uff08Full Garbage Collection\uff09\u662fJava\u865a\u62df\u673a\u6267\u884c\u7684\u4e00\u79cd\u5168\u9762\u7684\u5783\u573e\u56de\u6536\uff0c\u4f1a\u6e05\u7406\u6574\u4e2a\u5806\u5185\u5b58\uff0c\u5305\u62ec\u65b0\u751f\u4ee3\u548c\u8001\u5e74\u4ee3\u3002Full GC \u7684\u89e6\u53d1\u901a\u5e38\u53d1\u751f\u5728\u4ee5\u4e0b\u51e0\u79cd\u60c5\u51b5\u4e0b\uff1a<\/p>\n

    \n
  1. \n\u8001\u5e74\u4ee3\u7a7a\u95f4\u4e0d\u8db3\uff1a<\/strong><\/p>\n
      \n
    • \u5f53\u8001\u5e74\u4ee3\u7a7a\u95f4\uff08\u5305\u62ecPermGen\u6216\u8005Metaspace\uff09\u4e0d\u8db3\u4ee5\u5bb9\u7eb3\u65b0\u7684\u5bf9\u8c61\u65f6\uff0c\u4f1a\u89e6\u53d1Full GC\u3002\u8001\u5e74\u4ee3\u7684\u7a7a\u95f4\u7d27\u5f20\u53ef\u80fd\u5bfc\u81f4\u65b0\u751f\u4ee3\u7684\u5bf9\u8c61\u664b\u5347\u65f6\u65e0\u6cd5\u5206\u914d\u8db3\u591f\u7684\u7a7a\u95f4\uff0c\u4ece\u800c\u89e6\u53d1Full GC\u3002<\/li>\n<\/ul>\n<\/li>\n
    • \n\u6c38\u4e45\u4ee3\u7a7a\u95f4\u4e0d\u8db3\uff08\u5bf9\u4e8e\u4f7f\u7528\u6c38\u4e45\u4ee3\u7684JVM\u7248\u672c\uff09\uff1a<\/strong><\/p>\n
        \n
      • \n\u5728\u65e9\u671f\u7684JVM\u7248\u672c\u4e2d\uff0c\u4f7f\u7528\u6c38\u4e45\u4ee3\u6765\u5b58\u50a8\u7c7b\u7684\u5143\u6570\u636e\uff08PermGen\u7a7a\u95f4\uff09\u3002\u5f53\u52a0\u8f7d\u5927\u91cf\u7c7b\u6216\u8005\u52a8\u6001\u751f\u6210\u7c7b\u65f6\uff0c\u53ef\u80fd\u5bfc\u81f4PermGen\u7a7a\u95f4\u4e0d\u8db3\uff0c\u89e6\u53d1Full GC\u3002\n<\/li>\n
      • \n\u5728JDK 8 \u53ca\u4e4b\u540e\u7684\u7248\u672c\u4e2d\uff0c\u6c38\u4e45\u4ee3\u88ab\u79fb\u9664\uff0c\u53d6\u800c\u4ee3\u4e4b\u7684\u662f\u5143\u7a7a\u95f4\uff08Metaspace\uff09\uff0c\u5b83\u7684\u5927\u5c0f\u4e0d\u518d\u53d7\u5230\u56fa\u5b9a\u9650\u5236\uff0c\u800c\u662f\u7531\u4e3b\u673a\u7684\u7269\u7406\u5185\u5b58\u52a8\u6001\u5206\u914d\u3002\n<\/li>\n<\/ul>\n<\/li>\n
      • \nCMS\u6536\u96c6\u5668\u7684Concurrent Mode Failure\uff1a<\/strong><\/p>\n
          \n
        • \u5728\u4f7f\u7528CMS\uff08Concurrent Mark-Sweep\uff09\u5783\u573e\u6536\u96c6\u5668\u65f6\uff0c\u5f53CMS\u65e0\u6cd5\u4e3a\u65b0\u751f\u4ee3\u63d0\u4f9b\u8db3\u591f\u7684\u7a7a\u95f4\u65f6\uff0c\u4f1a\u89e6\u53d1Full GC\u3002\u8fd9\u79cd\u60c5\u51b5\u53ef\u80fd\u53d1\u751f\u5728CMS\u6536\u96c6\u8fc7\u7a0b\u4e2d\u5e76\u53d1\u6e05\u7406\u7684\u901f\u5ea6\u8d76\u4e0d\u4e0a\u65b0\u751f\u4ee3\u5bf9\u8c61\u7684\u4ea7\u751f\u901f\u5ea6\uff0c\u4ece\u800c\u5bfc\u81f4\u7a7a\u95f4\u4e0d\u8db3\u3002<\/li>\n<\/ul>\n<\/li>\n
        • \nSystem.gc() \u8c03\u7528\uff1a<\/strong><\/p>\n
            \n
          • \u8c03\u7528System.gc()<\/code>\u6216\u8005Runtime.getRuntime().gc()<\/code>\u7b49\u65b9\u5f0f\u663e\u5f0f\u89e6\u53d1\u5783\u573e\u56de\u6536\u65f6\uff0c\u53ef\u80fd\u4f1a\u89e6\u53d1Full GC\u3002\u4f46\u8fd9\u79cd\u65b9\u5f0f\u4e0d\u662f\u5efa\u8bae\u7684\u505a\u6cd5\uff0c\u56e0\u4e3aJava\u865a\u62df\u673a\u901a\u5e38\u4f1a\u5c3d\u529b\u907f\u514d\u6267\u884cFull GC\uff0c\u4ee5\u514d\u5bf9\u7a0b\u5e8f\u7684\u6027\u80fd\u4ea7\u751f\u8d1f\u9762\u5f71\u54cd\u3002<\/li>\n<\/ul>\n<\/li>\n
          • \n\u6301\u4e45\u4ee3\u6216\u5143\u7a7a\u95f4\u4e0d\u8db3\uff1a<\/strong><\/p>\n
              \n
            • \u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u5982\u679c\u6301\u4e45\u4ee3\uff08\u5728JDK 7\u53ca\u4e4b\u524d\u7684\u7248\u672c\uff09\u6216\u5143\u7a7a\u95f4\uff08\u5728JDK 8\u53ca\u4e4b\u540e\u7684\u7248\u672c\uff09\u4e0d\u8db3\u4ee5\u5b58\u50a8\u7c7b\u7684\u5143\u6570\u636e\uff0c\u4e5f\u53ef\u80fd\u89e6\u53d1Full GC\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n

              Full GC\u662f\u4e00\u79cd\u6bd4\u8f83\u91cd\u91cf\u7ea7\u7684\u5783\u573e\u56de\u6536\u64cd\u4f5c\uff0c\u56e0\u4e3a\u5b83\u4f1a\u505c\u6b62\u5e94\u7528\u7a0b\u5e8f\u7684\u6240\u6709\u7ebf\u7a0b\uff0c\u5bf9\u6574\u4e2a\u5806\u8fdb\u884c\u6e05\u7406\u3002\u56e0\u6b64\uff0cFull GC\u7684\u9891\u7e41\u53d1\u751f\u901a\u5e38\u662f\u9700\u8981\u5173\u6ce8\u548c\u4f18\u5316\u7684\u4e00\u4e2a\u65b9\u5411\u3002\u4f18\u5316Full GC\u7684\u89e6\u53d1\u673a\u5236\u3001\u8c03\u6574\u5806\u5185\u5b58\u5927\u5c0f\u3001\u4f7f\u7528\u5408\u9002\u7684\u5783\u573e\u6536\u96c6\u5668\u7b49\u624b\u6bb5\u53ef\u4ee5\u964d\u4f4eFull GC\u7684\u9891\u7387\uff0c\u63d0\u9ad8\u5e94\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

              Full GC\uff08Full Garbage Collection\uff09\u662fJava\u865a\u62df\u673a\u6267\u884c\u7684\u4e00\u79cd\u5168\u9762\u7684\u5783\u573e\u56de\u6536\uff0c\u4f1a\u6e05 […]<\/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-11268","post","type-post","status-publish","format-standard","hentry","category-jvm"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11268","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=11268"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11268\/revisions"}],"predecessor-version":[{"id":16979,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11268\/revisions\/16979"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=11268"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=11268"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=11268"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}