{"id":2924,"date":"2023-07-14T14:49:29","date_gmt":"2023-07-14T06:49:29","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/?p=2924"},"modified":"2023-07-14T14:49:30","modified_gmt":"2023-07-14T06:49:30","slug":"java%e7%9a%84%e5%9e%83%e5%9c%be%e5%9b%9e%e6%94%b6%e6%9c%ba%e5%88%b6%e8%af%a6%e8%a7%a3-%e4%bb%8e%e5%85%a5%e9%97%a8%e5%88%b0%e5%87%ba%e5%9c%9f%ef%bc%8c%e5%ad%a6%e4%b8%8d%e4%bc%9a","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/java\/java%e7%9a%84%e5%9e%83%e5%9c%be%e5%9b%9e%e6%94%b6%e6%9c%ba%e5%88%b6%e8%af%a6%e8%a7%a3-%e4%bb%8e%e5%85%a5%e9%97%a8%e5%88%b0%e5%87%ba%e5%9c%9f%ef%bc%8c%e5%ad%a6%e4%b8%8d%e4%bc%9a\/","title":{"rendered":"Java\u7684\u5783\u573e\u56de\u6536\u673a\u5236\u8be6\u89e3\u2014\u2014\u4ece\u5165\u95e8\u5230\u51fa\u571f\uff0c\u5b66\u4e0d\u4f1a\u63a5\u7740\u6765\u780d\u6211\uff01"},"content":{"rendered":"<link rel=\"stylesheet\" href=\"https:\/\/csdnimg.cn\/release\/blogv2\/dist\/mdeditor\/css\/editerView\/kdoc_html_views-1a98987dfd.css\">\n \t<link rel=\"stylesheet\" href=\"https:\/\/csdnimg.cn\/release\/blogv2\/dist\/mdeditor\/css\/editerView\/ck_htmledit_views-25cebea3f9.css\">\n<div id=\"content_views\" class=\"markdown_views prism-atom-one-dark\">\n <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"display: none;\"> <path stroke-linecap=\"round\" d=\"M5,0 0,2.5 5,5z\" id=\"raphael-marker-block\" style=\"-webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"><\/path>\n <\/svg><\/p>\n<div class=\"toc\">\n<h3>\u6587\u7ae0\u76ee\u5f55<\/h3>\n<ul>\n<li><a href=\"#_4\" target=\"_blank\"  rel=\"nofollow\" >\u54ea\u4e9b\u5185\u5b58\u9700\u8981\u56de\u6536<\/a><\/li>\n<li><a href=\"#_11\" target=\"_blank\"  rel=\"nofollow\" >\u56de\u6536\u5806\uff1a\u5783\u573e\u7684\u5b9a\u4e49<\/a><\/li>\n<li>\n<ul>\n<li><a href=\"#_12\" target=\"_blank\"  rel=\"nofollow\" >\u5f15\u7528\u8ba1\u6570\u7b97\u6cd5\uff1a<\/a><\/li>\n<li><a href=\"#_25\" target=\"_blank\"  rel=\"nofollow\" >\u53ef\u8fbe\u6027\u5206\u6790\u7b97\u6cd5\uff1a<\/a><\/li>\n<li>\n<ul>\n<li><a href=\"#GC_Roots_33\" target=\"_blank\"  rel=\"nofollow\" >GC Roots\u7684\u5bf9\u8c61<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li><a href=\"#_46\" target=\"_blank\"  rel=\"nofollow\" >\u56de\u6536\u65b9\u6cd5\u533a\uff1a\u5783\u573e\u7684\u5b9a\u4e49<\/a><\/li>\n<li><a href=\"#_61\" target=\"_blank\"  rel=\"nofollow\" >\u5982\u4f55\u56de\u6536\u5783\u573e<\/a><\/li>\n<li>\n<ul>\n<li><a href=\"#_66\" target=\"_blank\"  rel=\"nofollow\" >\u5783\u573e\u56de\u6536\u7b97\u6cd5\u603b\u7ed3<\/a><\/li>\n<li>\n<ul>\n<li><a href=\"#_67\" target=\"_blank\"  rel=\"nofollow\" >\u6807\u8bb0\u2014\u6e05\u9664\u7b97\u6cd5\uff08\u9002\u7528\u8001\u5e74\u4ee3\uff0c\u4f46\u662f\u57fa\u672c\u5e9f\u5f03\u4e86\uff09<\/a><\/li>\n<li><a href=\"#_73\" target=\"_blank\"  rel=\"nofollow\" >\u6807\u8bb0\u2014\u590d\u5236\u7b97\u6cd5\uff08\u73b0\u5728\u65b0\u751f\u4ee3\u666e\u904d\u7528\u7684\uff09<\/a><\/li>\n<li><a href=\"#_82\" target=\"_blank\"  rel=\"nofollow\" >\u6807\u8bb0\u2014\u6574\u7406\u7b97\u6cd5\uff08\u73b0\u5728\u8001\u5e74\u4ee3\u666e\u904d\u7528\u7684\uff09<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li><a href=\"#JVM_GC_94\" target=\"_blank\"  rel=\"nofollow\" >JVM GC\u7684\u79cd\u7c7b<\/a><\/li>\n<li>\n<ul>\n<li><a href=\"#GC_111\" target=\"_blank\"  rel=\"nofollow\" >GC\u7684\u89e6\u53d1\u673a\u5236<\/a><\/li>\n<li>\n<ul>\n<li><a href=\"#GCMinor_GC_112\" target=\"_blank\"  rel=\"nofollow\" >\u5e74\u8f7b\u4ee3GC(Minor GC)\u89e6\u53d1\u673a\u5236<\/a><\/li>\n<li><a href=\"#GCMajor_GCFull_GC_120\" target=\"_blank\"  rel=\"nofollow\" >\u8001\u5e74\u4ee3GC(Major GC\/Full GC)\u89e6\u53d1\u673a\u5236<\/a><\/li>\n<li><a href=\"#Full_GC_135\" target=\"_blank\"  rel=\"nofollow\" >Full GC\u89e6\u53d1\u673a\u5236<\/a><\/li>\n<\/ul>\n<\/li>\n<li><a href=\"#Java_146\" target=\"_blank\"  rel=\"nofollow\" >\u4e3a\u4ec0\u4e48\u9700\u8981\u628aJava\u5806\u5206\u4ee3\uff1f<\/a><\/li>\n<\/ul>\n<\/li>\n<li><a href=\"#JVMGC_153\" target=\"_blank\"  rel=\"nofollow\" >JVM\u4e2d\u4e00\u6b21\u5b8c\u6574\u7684GC\u6d41\u7a0b\u662f\u600e\u6837\u7684\uff1f<\/a><\/li>\n<li><a href=\"#JVM_GC_183\" target=\"_blank\"  rel=\"nofollow\" >JVM GC\u6ce8\u610f\u70b9\uff1a<\/a><\/li>\n<li>\n<ul>\n<li><a href=\"#Full_GC_184\" target=\"_blank\"  rel=\"nofollow\" >Full GC\u4f1a\u5bfc\u81f4\u4ec0\u4e48\uff1f<\/a><\/li>\n<li><a href=\"#JVMGC_187\" target=\"_blank\"  rel=\"nofollow\" >JVM\u4ec0\u4e48\u65f6\u5019\u89e6\u53d1GC\uff1f<\/a><\/li>\n<li><a href=\"#FullGC_194\" target=\"_blank\"  rel=\"nofollow\" >\u5982\u4f55\u51cf\u5c11FullGC\u7684\u6b21\u6570\uff1f<\/a><\/li>\n<li><a href=\"#_203\" target=\"_blank\"  rel=\"nofollow\" >\u4e3a\u4ec0\u4e48\u8001\u5e74\u4ee3\u4e0d\u80fd\u4f7f\u7528\u6807\u8bb0\u590d\u5236\uff1f<\/a><\/li>\n<li><a href=\"#EdenSurvivor_207\" target=\"_blank\"  rel=\"nofollow\" >\u65b0\u751f\u4ee3\u4e3a\u4ec0\u4e48\u8981\u5206\u4e3aEden\u548cSurvivor\uff1f<\/a><\/li>\n<li><a href=\"#Survivor_211\" target=\"_blank\"  rel=\"nofollow\" >\u4e3a\u4ec0\u4e48\u8981\u8bbe\u7f6e\u4e24\u4e2aSurvivor\u533a\u57df\uff1f<\/a><\/li>\n<li><a href=\"#_223\" target=\"_blank\"  rel=\"nofollow\" >\u4e3a\u4ec0\u4e48\u65b0\u751f\u4ee3\u548c\u8001\u5e74\u4ee3\u8981\u91c7\u7528\u4e0d\u540c\u7684\u56de\u6536\u7b97\u6cd5\uff1f<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div>\n<blockquote><p>\u9996\u5148\u6211\u4eec\u8981\u77e5\u9053\u54ea\u4e9b\u5185\u5b58\u9700\u8981\u88ab\u56de\u6536\uff1f<\/p><\/blockquote>\n<h1><a id=\"_4\"><\/a>\u54ea\u4e9b\u5185\u5b58\u9700\u8981\u56de\u6536<\/h1>\n<p>\u5728Java\u5185\u5b58\u8fd0\u884c\u65f6\u533a\u57df\u7684\u5404\u4e2a\u90e8\u5206\u4e2d\uff0c\u5806\u548c\u65b9\u6cd5\u533a\u8fd9\u4e24\u4e2a\u533a\u57df\u5219\u6709\u7740\u5f88\u663e\u8457\u7684\u4e0d\u786e\u5b9a\u6027\uff1a\u4e00\u4e2a\u63a5\u53e3\u7684\u591a\u4e2a\u5b9e\u73b0\u7c7b\u9700\u8981\u7684\u5185\u5b58\u53ef\u80fd\u4f1a\u4e0d\u4e00\u6837\uff0c\u4e00\u4e2a\u65b9\u6cd5\u6240\u6267\u884c\u7684\u4e0d\u540c\u6761\u4ef6\u5206\u652f\u6240\u9700\u8981\u7684\u5185\u5b58\u4e5f\u53ef\u80fd\u4e0d\u4e00\u6837\uff0c\u53ea\u6709\u5904\u4e8e\u8fd0\u884c\u671f\u95f4\uff0c\u6211\u4eec\u624d\u80fd\u77e5\u9053\u7a0b\u5e8f\u7a76\u7adf\u4f1a\u521b\u5efa\u54ea\u4e9b\u5bf9\u8c61\uff0c\u521b\u5efa\u591a\u5c11\u4e2a\u5bf9\u8c61\uff0c\u8fd9\u90e8\u5206\u5185\u5b58\u7684\u5206\u914d\u548c\u56de\u6536\u662f\u52a8\u6001\u7684\u3002<\/p>\n<p><mark>\u5783\u573e\u6536\u96c6\u5668\u6240\u5173\u6ce8\u7684\u6b63\u662f\u5806\u548c\u65b9\u6cd5\u533a\u7684\u5185\u5b58\u8be5\u5982\u4f55\u7ba1\u7406\u7684\u95ee\u9898\uff0c\u6211\u4eec\u5e73\u65f6\u6240\u8bf4\u7684\u5185\u5b58\u5206\u914d\u4e0e\u56de\u6536\u4e5f\u4ec5\u4ec5\u7279\u6307\u8fd9\u4e00\u90e8\u5206\u5185\u5b58<\/mark>\u3002<\/p>\n<h1><a id=\"_11\"><\/a>\u56de\u6536\u5806\uff1a\u5783\u573e\u7684\u5b9a\u4e49<\/h1>\n<h2><a id=\"_12\"><\/a>\u5f15\u7528\u8ba1\u6570\u7b97\u6cd5\uff1a<\/h2>\n<p>\u5728\u5bf9\u8c61\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u5f15\u7528\u8ba1\u6570\u5668\uff1a<\/p>\n<ul>\n<li>\u6bcf\u5f53\u6709\u4e00\u4e2a\u5730\u65b9\u5f15\u7528\u5b83\u65f6\uff0c\u8ba1\u6570\u5668\u503c\u5c31\u52a0\u4e00\uff1b<\/li>\n<li>\u5f53\u5f15\u7528\u5931\u6548\u65f6\uff0c\u8ba1\u6570\u5668\u503c\u5c31\u51cf\u4e00\uff1b<\/li>\n<\/ul>\n<p><mark>\u4efb\u4f55\u65f6\u523b\u8ba1\u6570\u5668\u4e3a\u96f6\u7684\u5bf9\u8c61\u5c31\u662f\u4e0d\u53ef\u80fd\u518d\u88ab\u4f7f\u7528\u7684<\/mark>\u3002<\/p>\n<p>\u4f46\u662f\uff0c\u5728Java\u9886\u57df\uff0c\u81f3\u5c11<strong>\u4e3b\u6d41\u7684Java\u865a\u62df\u673a\u91cc\u9762\u90fd\u6ca1\u6709\u9009\u7528\u5f15\u7528\u8ba1\u6570\u7b97\u6cd5\u6765\u7ba1\u7406\u5185\u5b58<\/strong>\uff0c\u4e3b\u8981\u539f\u56e0\u662f\uff0c\u8fd9\u4e2a\u770b\u4f3c\u7b80\u5355\u7684\u7b97\u6cd5\u6709\u5f88\u591a\u4f8b\u5916\u60c5\u51b5\u8981\u8003\u8651\uff0c\u5fc5\u987b\u8981\u914d\u5408\u5927\u91cf\u989d\u5916\u5904\u7406\u624d\u80fd\u4fdd\u8bc1\u6b63\u786e\u5730\u5de5\u4f5c\uff0c\u8b6c\u5982<strong>\u5355\u7eaf\u7684\u5f15\u7528\u8ba1\u6570\u5c31\u5f88\u96be\u89e3\u51b3\u5bf9\u8c61\u4e4b\u95f4\u76f8\u4e92\u5faa\u73af\u5f15\u7528\u7684\u95ee\u9898<\/strong>\u3002<\/p>\n<p>\u4e3e\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff1a\u5bf9\u8c61objA\u548cobjB\u90fd\u6709\u5b57\u6bb5instance\uff0c\u8d4b\u503c\u4ee4objA.instance=objB\u53ca<br \/>\nobjB.instance=objA\uff0c\u9664\u6b64\u4e4b\u5916\uff0c\u8fd9\u4e24\u4e2a\u5bf9\u8c61\u518d\u65e0\u4efb\u4f55\u5f15\u7528\uff0c\u5b9e\u9645\u4e0a\u8fd9\u4e24\u4e2a\u5bf9\u8c61\u5df2\u7ecf\u4e0d\u53ef\u80fd\u518d\u88ab\u8bbf\u95ee\uff0c\u4f46\u662f\u5b83\u4eec\u56e0\u4e3a\u4e92\u76f8\u5f15\u7528\u7740\u5bf9\u65b9\uff0c\u5bfc\u81f4\u5b83\u4eec\u7684\u5f15\u7528\u8ba1\u6570\u90fd\u4e0d\u4e3a\u96f6\uff0c\u5f15\u7528\u8ba1\u6570\u7b97\u6cd5\u4e5f\u5c31\u65e0\u6cd5\u56de\u6536\u5b83\u4eec\u3002<\/p>\n<h2><a id=\"_25\"><\/a>\u53ef\u8fbe\u6027\u5206\u6790\u7b97\u6cd5\uff1a<\/h2>\n<blockquote><p>\u5f53\u524d\u4e3b\u6d41\u7684\u5546\u7528\u7a0b\u5e8f\u8bed\u8a00\u7684\u5185\u5b58\u7ba1\u7406\u5b50\u7cfb\u7edf\uff0c\u90fd\u662f\u901a\u8fc7\u53ef\u8fbe\u6027\u5206\u6790\uff08Reachability Analysis\uff09\u7b97\u6cd5\u6765\u5224\u5b9a\u5bf9\u8c61\u662f\u5426\u5b58\u6d3b\u7684\u3002<\/p><\/blockquote>\n<p>\u8fd9\u4e2a\u7b97\u6cd5\u7684\u57fa\u672c\u601d\u8def\u5c31\u662f\u901a\u8fc7\u4e00\u7cfb\u5217\u79f0\u4e3a\u201cGC Roots\u201d\u7684\u6839\u5bf9\u8c61\u4f5c\u4e3a\u8d77\u59cb\u8282\u70b9\u96c6\uff0c\u4ece\u8fd9\u4e9b\u8282\u70b9\u5f00\u59cb\uff0c\u6839\u636e\u5f15\u7528\u5173\u7cfb\u5411\u4e0b\u641c\u7d22\uff0c\u641c\u7d22\u8fc7\u7a0b\u6240\u8d70\u8fc7\u7684\u8def\u5f84\u79f0\u4e3a\u201c\u5f15\u7528\u94fe\u201d\uff08Reference Chain\uff09\uff0c\u5982\u679c\u67d0\u4e2a\u5bf9\u8c61\u5230GC Roots\u95f4\u6ca1\u6709\u4efb\u4f55\u5f15\u7528\u94fe\u76f8\u8fde\uff0c\u6216\u8005\u7528\u56fe\u8bba\u7684\u8bdd\u6765\u8bf4\u5c31\u662f\u4eceGC Roots\u5230\u8fd9\u4e2a\u5bf9\u8c61\u4e0d\u53ef\u8fbe\u65f6\uff0c\u5219\u8bc1\u660e\u6b64\u5bf9\u8c61\u662f\u4e0d\u53ef\u80fd\u518d\u88ab\u4f7f\u7528\u7684\u3002<\/p>\n<p>\u5982\u4e0b\u56fe\u6240\u793a\uff0c\u5bf9\u8c61object 5\u3001object 6\u3001object 7\u867d\u7136\u4e92\u6709\u5173\u8054\uff0c\u4f46\u662f\u5b83\u4eec\u5230GC Roots\u662f\u4e0d\u53ef\u8fbe\u7684\uff0c\u56e0\u6b64\u5b83\u4eec\u5c06\u4f1a\u88ab\u5224\u5b9a\u4e3a\u53ef\u56de\u6536\u7684\u5bf9\u8c61\uff1a<\/p>\n<p><img decoding=\"async\" class=\"lazyload\"data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/14-48-55\/20230714144855bdbd82aba.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"><noscript><img decoding=\"async\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/14-48-55\/20230714144855bdbd82aba.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"><\/noscript><\/p>\n<h3><a id=\"GC_Roots_33\"><\/a>GC Roots\u7684\u5bf9\u8c61<\/h3>\n<p>\u5728Java\u6280\u672f\u4f53\u7cfb\u91cc\u9762\uff0c\u56fa\u5b9a\u53ef\u4f5c\u4e3aGC Roots\u7684\u5bf9\u8c61\u5305\u62ec\u4ee5\u4e0b\u51e0\u79cd\uff1a<\/p>\n<ul>\n<li><mark>\u5728\u865a\u62df\u673a\u6808\uff08\u6808\u5e27\u4e2d\u7684\u672c\u5730\u53d8\u91cf\u8868\uff09\u4e2d\u5f15\u7528\u7684\u5bf9\u8c61<\/mark>\uff0c\u8b6c\u5982\u5404\u4e2a\u7ebf\u7a0b\u88ab\u8c03\u7528\u7684\u65b9\u6cd5\u5806\u6808\u4e2d\u4f7f\u7528\u5230\u7684\u53c2\u6570\u3001\u5c40\u90e8\u53d8\u91cf\u3001\u4e34\u65f6\u53d8\u91cf\u7b49\u3002<\/li>\n<li><mark>\u5728\u65b9\u6cd5\u533a\u4e2d\u7c7b\u9759\u6001\u5c5e\u6027\u5f15\u7528\u7684\u5bf9\u8c61<\/mark>\uff0c\u8b6c\u5982Java\u7c7b\u7684\u5f15\u7528\u7c7b\u578b\u9759\u6001\u53d8\u91cf\u3002<\/li>\n<li><mark>\u5728\u65b9\u6cd5\u533a\u4e2d\u5e38\u91cf\u5f15\u7528\u7684\u5bf9\u8c61<\/mark>\uff0c\u8b6c\u5982\u5b57\u7b26\u4e32\u5e38\u91cf\u6c60\uff08String Table\uff09\u91cc\u7684\u5f15\u7528\u3002<\/li>\n<li><mark>\u5728\u672c\u5730\u65b9\u6cd5\u6808\u4e2dJNI\uff08\u5373\u901a\u5e38\u6240\u8bf4\u7684Native\u65b9\u6cd5\uff09\u5f15\u7528\u7684\u5bf9\u8c61<\/mark>\u3002<\/li>\n<li><mark>Java\u865a\u62df\u673a\u5185\u90e8\u7684\u5f15\u7528<\/mark>\uff0c\u5982<strong>\u57fa\u672c\u6570\u636e\u7c7b\u578b\u5bf9\u5e94\u7684Class\u5bf9\u8c61<\/strong>\uff0c<strong>\u4e00\u4e9b\u5e38\u9a7b\u7684\u5f02\u5e38\u5bf9\u8c61<\/strong>\uff08\u6bd4\u5982 NullPointExcepiton\u3001OutOfMemoryError\uff09\u7b49\uff0c\u8fd8\u6709<strong>\u7cfb\u7edf\u7c7b\u52a0\u8f7d\u5668<\/strong>\u3002<\/li>\n<li><mark>\u6240\u6709\u88ab\u540c\u6b65\u9501\uff08synchronized\u5173\u952e\u5b57\uff09\u6301\u6709\u7684\u5bf9\u8c61<\/mark>\u3002<\/li>\n<li><mark>\u53cd\u6620Java\u865a\u62df\u673a\u5185\u90e8\u60c5\u51b5\u7684JMXBean\u3001JVMTI\u4e2d\u6ce8\u518c\u7684\u56de\u8c03\u3001\u672c\u5730\u4ee3\u7801\u7f13\u5b58<\/mark>\u7b49\u3002<\/li>\n<\/ul>\n<h1><a id=\"_46\"><\/a>\u56de\u6536\u65b9\u6cd5\u533a\uff1a\u5783\u573e\u7684\u5b9a\u4e49<\/h1>\n<p>\u65b9\u6cd5\u533a\u7684\u5783\u573e\u6536\u96c6\u4e3b\u8981\u56de\u6536\u4e24\u90e8\u5206\u5185\u5bb9\uff1a<mark>\u5e9f\u5f03\u7684\u5e38\u91cf\u548c\u4e0d\u518d\u4f7f\u7528\u7684\u7c7b\u578b<\/mark>\u3002<\/p>\n<p>\u56de\u6536\u5e9f\u5f03\u5e38\u91cf\u4e0e\u56de\u6536Java\u5806\u4e2d\u7684\u5bf9\u8c61\u975e\u5e38\u7c7b\u4f3c<\/p>\n<blockquote><p>\u4e3e\u4e2a\u5e38\u91cf\u6c60\u4e2d\u5b57\u9762\u91cf\u56de\u6536\u7684\u4f8b\u5b50\uff1a<br \/>\n\u5047\u5982\u4e00\u4e2a\u5b57\u7b26\u4e32\u201cjava\u201d\u66fe\u7ecf\u8fdb\u5165\u5e38\u91cf\u6c60\u4e2d\uff0c\u4f46\u662f\u5f53\u524d\u7cfb\u7edf\u53c8\u6ca1\u6709\u4efb\u4f55\u4e00\u4e2a\u5b57\u7b26\u4e32\u5bf9\u8c61\u7684\u503c\u662f\u201cjava\u201d\uff0c\u6362\u53e5\u8bdd\u8bf4\uff0c\u5df2\u7ecf\u6ca1\u6709\u4efb\u4f55\u5b57\u7b26\u4e32\u5bf9\u8c61\u5f15\u7528\u5e38\u91cf\u6c60\u4e2d\u7684\u201cjava\u201d\u5e38\u91cf\uff0c\u4e14\u865a\u62df\u673a\u4e2d\u4e5f\u6ca1\u6709\u5176\u4ed6\u5730\u65b9\u5f15\u7528\u8fd9\u4e2a\u5b57\u9762\u91cf\u3002\u5982\u679c\u5728\u8fd9\u65f6\u53d1\u751f\u5185\u5b58\u56de\u6536\uff0c\u800c\u4e14\u5783\u573e\u6536\u96c6\u5668\u5224\u65ad\u786e\u6709\u5fc5\u8981\u7684\u8bdd\uff0c\u8fd9\u4e2a\u201cjava\u201d\u5e38\u91cf\u5c31\u5c06\u4f1a\u88ab\u7cfb\u7edf\u6e05\u7406\u51fa\u5e38\u91cf\u6c60\u3002\u5e38\u91cf\u6c60\u4e2d\u5176\u4ed6\u7c7b\uff08\u63a5\u53e3\uff09\u3001\u65b9\u6cd5\u3001\u5b57\u6bb5\u7684\u7b26\u53f7\u5f15\u7528\u4e5f\u4e0e\u6b64\u7c7b\u4f3c\u3002<\/p><\/blockquote>\n<p>\u5224\u5b9a\u4e00\u4e2a\u5e38\u91cf\u662f\u5426\u201c\u5e9f\u5f03\u201d\u8fd8\u662f\u76f8\u5bf9\u7b80\u5355\uff0c\u770b\u8fd8\u6709\u6ca1\u6709\u5730\u65b9\u5f15\u7528\u8fd9\u4e2a\u5e38\u91cf\u5c31OK\u4e86\uff0c\u800c\u5224\u5b9a\u4e00\u4e2a\u7c7b\u578b\u662f\u5426\u5c5e\u4e8e\u201c\u4e0d\u518d\u88ab\u4f7f\u7528\u7684\u7c7b\u201d\u7684\u6761\u4ef6\u5c31\u6bd4\u8f83\u82db\u523b\u4e86\u3002<\/p>\n<p>\u9700\u8981\u540c\u65f6\u6ee1\u8db3\u4e0b\u9762\u4e09\u4e2a\u6761\u4ef6\uff1a<\/p>\n<ul>\n<li><mark>\u8be5\u7c7b\u6240\u6709\u7684\u5b9e\u4f8b\u90fd\u5df2\u7ecf\u88ab\u56de\u6536\uff0c\u4e5f\u5c31\u662fJava\u5806\u4e2d\u4e0d\u5b58\u5728\u8be5\u7c7b\u53ca\u5176\u4efb\u4f55\u6d3e\u751f\u5b50\u7c7b\u7684\u5b9e\u4f8b<\/mark>\u3002<\/li>\n<li><mark>\u52a0\u8f7d\u8be5\u7c7b\u7684\u7c7b\u52a0\u8f7d\u5668\u5df2\u7ecf\u88ab\u56de\u6536<\/mark>\uff0c\u8fd9\u4e2a\u6761\u4ef6\u9664\u975e\u662f\u7ecf\u8fc7\u7cbe\u5fc3\u8bbe\u8ba1\u7684\u53ef\u66ff\u6362\u7c7b\u52a0\u8f7d\u5668\u7684\u573a\u666f\uff0c\u5982OSGi\u3001JSP\u7684\u91cd\u52a0\u8f7d\u7b49\uff0c\u5426\u5219\u901a\u5e38\u662f\u5f88\u96be\u8fbe\u6210\u7684\u3002<\/li>\n<li><mark>\u8be5\u7c7b\u5bf9\u5e94\u7684java.lang.Class\u5bf9\u8c61\u6ca1\u6709\u5728\u4efb\u4f55\u5730\u65b9\u88ab\u5f15\u7528\uff0c\u65e0\u6cd5\u5728\u4efb\u4f55\u5730\u65b9\u901a\u8fc7\u53cd\u5c04\u8bbf\u95ee\u8be5\u7c7b\u7684\u65b9\u6cd5<\/mark>\u3002<\/li>\n<\/ul>\n<h1><a id=\"_61\"><\/a>\u5982\u4f55\u56de\u6536\u5783\u573e<\/h1>\n<p>\u5173\u4e8e\u5206\u4ee3\u56de\u6536\u7406\u8bba\u4e0e\u5783\u573e\u56de\u6536\u7b97\u6cd5\u7684\u63a8\u6f14\u53ef\u4ee5\u53c2\u8003\u7684\u6211\u7684\u53e6\u4e00\u7bc7\u535a\u6587\uff1a<a href=\"https:\/\/yangyongli.blog.csdn.net\/article\/details\/126473167\" target=\"_blank\"  rel=\"nofollow\" >https:\/\/yangyongli.blog.csdn.net\/article\/details\/126473167<\/a><\/p>\n<p>\u7ecf\u8fc7\u4e0a\u9762\u7684\u6587\u7ae0\u4e2dgc\u7684\u4e0d\u65ad\u53d1\u5c55\uff0c\u9010\u6e10\u5230\u4e86\u6211\u4eec\u73b0\u5728\u7528\u7684gc\u7684\u6837\u5b50\uff1a<\/p>\n<h2><a id=\"_66\"><\/a>\u5783\u573e\u56de\u6536\u7b97\u6cd5\u603b\u7ed3<\/h2>\n<h3><a id=\"_67\"><\/a>\u6807\u8bb0\u2014\u6e05\u9664\u7b97\u6cd5\uff08\u9002\u7528\u8001\u5e74\u4ee3\uff0c\u4f46\u662f\u57fa\u672c\u5e9f\u5f03\u4e86\uff09<\/h3>\n<p>\u8fd9\u662f\u6700\u65e9\u6700\u57fa\u7840\u7684\u7b97\u6cd5\uff0c\u9996\u5148\u6807\u8bb0\u51fa\u8981\u56de\u6536\u7684\u5bf9\u8c61\uff0c\u6807\u8bb0\u5b8c\u6210\u540e\uff0c\u7edf\u4e00\u56de\u6536\u88ab\u6807\u8bb0\u7684\u5bf9\u8c61<\/p>\n<p>\u7f3a\u70b9\uff1a<br \/>\n1\u3001\u6267\u884c\u6548\u7387\u4e0d\u7a33\u5b9a\uff0c\u968f\u7740\u5bf9\u8c61\u6570\u91cf\u7684\u589e\u591a\uff0c\u6807\u8bb0\u6b21\u6570\u589e\u591a\uff0c\u6e05\u695a\u4e5f\u53d8\u591a\uff0c\u6267\u884c\u6548\u7387\u4e0b\u964d2\u3001\u5185\u5b58\u7a7a\u95f4\u788e\u7247\u5316\uff0c\u5047\u5982\u8bf4\u88ab\u6e05\u9664\u548c\u4fdd\u7559\u7684\u5bf9\u8c61\u5185\u5b58\u4ea4\u9519\u5728\u4e00\u8d77\uff0c\u5c31\u4f1a\u5bfc\u81f4\u5185\u5b58\u7a7a\u95f4\u788e\u7247\u5316\uff0c\u5373\u4f7f\u7a7a\u95f4\u5145\u8db3\uff0c\u7531\u4e8e\u788e\u7247\u5316\u4e5f\u6ca1\u6cd5\u65b0\u5efa\u5bf9\u8c61\uff0c\u5bfc\u81f4\u7a7a\u95f4\u6d6a\u8d39\u3002<\/p>\n<h3><a id=\"_73\"><\/a>\u6807\u8bb0\u2014\u590d\u5236\u7b97\u6cd5\uff08\u73b0\u5728\u65b0\u751f\u4ee3\u666e\u904d\u7528\u7684\uff09<\/h3>\n<p>\u4ed6\u5b9e\u73b0\u539f\u7406\u662f\u628a\u5185\u5b58\u7a7a\u95f4\u5206\u6210\u4e24\u5757\u7a7a\u95f4\uff0c\u6bcf\u6b21\u53ea\u4f7f\u7528\u5176\u4e2d\u4e00\u5757\uff0c\u5c06\u5b58\u6d3b\u7684\u5bf9\u8c61\u590d\u5236\u5230\u53e6\u4e00\u5757\u7a7a\u95f4\uff0c\u5047\u5982\u8bf4\u5927\u91cf\u7684\u5bf9\u8c61\u88ab\u56de\u6536\uff0c\u53ea\u9700\u8981\u590d\u5236\u4e00\u5c0f\u90e8\u5206\u5373\u53ef\uff0c\u6240\u4ee5\u9002\u7528\u4e8e\u65b0\u751f\u4ee3\u3002\uff08\u901f\u5ea6\u5feb\uff0c\u6548\u7387\u9ad8\uff09<\/p>\n<p>\u7f3a\u70b9\uff1a\u4ee3\u4ef7\u662f\u660e\u663e\u7684\u9700\u8981\u6d6a\u8d39\u4e00\u534a\u7684\u7a7a\u95f4<\/p>\n<p>\u4f46\u662f\u540e\u9762\u9488\u5bf9 \u5bf9\u8c61\u671d\u751f\u7184\u706d\u7684\u7279\u70b9\u884d\u751f\u66f4\u597d\u7684\u534a\u533a\u590d\u5236\u7b56\u7565\u2014\u2014\u201cAppel\u201d\u5f0f\u56de\u6536\uff0c\u5177\u4f53\u7684\u7b56\u7565\u4e3a\uff0c\u5c06\u65b0\u751f\u4ee3\u7a7a\u95f4\u5206\u4e3a\u4e00\u5757\u8f83\u5927Eden\u7684\u7a7a\u95f4\u548c\u4e24\u5757\u8f83\u5c0fSurvivor\uff0c\u5176\u4e2dHotSpot\u865a\u62df\u673a\u9ed8\u8ba4\u7684\u6bd4\u4f8b\u662fEden\uff1aSurvivor=8:1,\u4e5f\u5c31\u662f\u8bf4\u6bcf\u6b21\u65b0\u751f\u4ee3\u62e5\u670990%\u7684\u7a7a\u95f4\uff08Survivor80+Eden10\uff09\uff0c\u5927\u5927\u51cf\u5c11\u4e86\u7a7a\u95f4\u6d6a\u8d39\uff0c\u540c\u6837\u4e5f\u4f1a\u6709\u8fd9\u6837\u7684\u95ee\u9898\uff0c\u5047\u5982\u8bf4\u603b\u5171100MB\u7a7a\u95f4 \uff0c\u6b64\u6b21\u56de\u6536\u5bf9\u8c61\u4e3a20MB\uff0c\u5f88\u663e\u7136\uff0c\u5269\u4e0b\u768410MB\u65e0\u6cd5\u5360\u4e0b\uff0c\u8c01\u90fd\u4e0d\u80fd\u4fdd\u8bc1\u8fd9\u79cd\u60c5\u51b5\u4e0d\u4f1a\u53d1\u751f\uff0c\u8fd9\u65f6Appel\u91c7\u7528\u4e86\u201c\u9003\u751f\u95e8\u201d\u8bbe\u8ba1\u2014\u2014\u5185\u5b58\u5206\u914d\u62c5\u4fdd<\/p>\n<blockquote><p><strong>\u5185\u5b58\u5206\u914d\u62c5\u4fdd<\/strong>\uff1a<strong>\u5c31\u662f\u5c06Survivor\u65e0\u6cd5\u7ad9\u4e0b\u7684\u90a3\u90e8\u5206\u76f4\u63a5\u653e\u5165\u8001\u5e74\u4ee3\u3002\u5c31\u662f\u76f8\u5f53\u4e8e\u628a\u4e0a\u9762\u4f8b\u5b50\u4e2d\u768420MB\u76f4\u63a5\u653e\u5165\u8001\u5e74\u4ee3\uff08\u4e5f\u5c31\u662f\u664b\u5347\u8001\u5e74\u4ee3\u7684\u7279\u6b8a\u60c5\u51b5\uff09<\/strong>\u3002<\/p><\/blockquote>\n<h3><a id=\"_82\"><\/a>\u6807\u8bb0\u2014\u6574\u7406\u7b97\u6cd5\uff08\u73b0\u5728\u8001\u5e74\u4ee3\u666e\u904d\u7528\u7684\uff09<\/h3>\n<p>\u4e0e\u6807\u8bb0\u2014\u6e05\u9664\u4e0d\u540c\u7684\u662f\uff0c\u5c06\u5b58\u6d3b\u7684\u5bf9\u8c61\u6807\u8bb0\u540e\uff0c\u6ca1\u6709\u8fdb\u884c\u76f4\u63a5\u6e05\u9664\u800c\u662f\u5c06\u5b58\u6d3b\u7684\u5bf9\u8c61\u5411\u4e00\u7aef\u6574\u7406\u5230\u4e00\u8d77\uff0c\u8fd9\u6837\u5c31\u89e3\u51b3\u4e86\u7a7a\u95f4\u788e\u7247\u5316\u95ee\u9898\u3002<\/p>\n<p>\u56e0\u4e3a\u8001\u5e74\u4ee3\u7684\u7279\u70b9\u6240\u4ee5\u53ea\u6709\u5f88\u5c11\u4e00\u90e8\u5206\u88ab\u6e05\u9664\uff0c\u5728\u8001\u5e74\u4ee3\u4f1a\u6709\u5927\u91cf\u7684\u6d3b\u5bf9\u8c61\uff0c\u5e76\u4e14\u9700\u8981\u66f4\u65b0\u5bf9\u8c61\u7d22\u5f15\uff0c\u8fd9\u5c31\u5bfc\u81f4\u4e86\u7cfb\u7edf\u7684\u8d1f\u91cd\uff0c\u5e76\u4e14\u8fd9\u79cd\u5bf9\u8c61\u4e00\u5b9a\u64cd\u4f5c\u5fc5\u987b\u5728\u7cfb\u7edf\u505c\u6b62\u7684\u60c5\u51b5\u4e0b\u8fdb\u884c\uff0c\u8fd9\u662f\u5c31\u51fa\u73b0\u4e86\u6211\u4eec\u7ecf\u5e38\u542c\u5230\u7684\u201c\u201cStop The World\u201d\u3002<\/p>\n<blockquote><p>\u53e6\u5916\u8fd8\u6709\u4e00\u79cd\u548c\u7a00\u6ce5\u8d70\u4e00\u6b65\u770b\u4e00\u6b65\u7684\u65b9\u6cd5\uff0c\u5c31\u662f\u5e73\u5e38\u7684\u65f6\u5019\u91c7\u7528\u6807\u8bb0\u6e05\u9664\u6cd5\uff0c\u4ea7\u751f\u788e\u7247\u5316\u540e\uff0c\u76f4\u5230\u5f71\u54cd\u5230\u5bf9\u8c61\u5206\u914d\u65f6\uff0c\u518d\u91c7\u7528\u6807\u8bb0\u6574\u7406\u6cd5\uff0c\u4ee5\u83b7\u5f97\u5b8c\u6574\u7684\u7a7a\u95f4\u3002<strong>\u57fa\u4e8e\u6807\u8bb0\u2014\u6e05\u9664\u7684\u7b97\u6cd5\u7684CMS\u6536\u96c6\u5668\u5c31\u662f\u91c7\u7528\u7684\u8fd9\u79cd\u5904\u7406\u65b9\u6cd5<\/strong>\u3002<\/p><\/blockquote>\n<hr>\n<blockquote><p>\u4e0b\u9762\u6211\u4eec\u6765\u770b\u4e00\u4e0bJVM \u662f\u600e\u4e48\u8fdb\u884c\u56de\u6536\u7684\uff0c\u5176\u4e2dJVM\u4e2d\u6709\u4e09\u79cdGC\uff1a<\/p><\/blockquote>\n<h1><a id=\"JVM_GC_94\"><\/a>JVM GC\u7684\u79cd\u7c7b<\/h1>\n<p>JVM\u5e38\u89c1\u7684GC\u5305\u62ec\u4e09\u79cd\uff1a<mark>Minor GC\uff0cMajor GC\u4e0eFull GC<\/mark><\/p>\n<p>\u9488\u5bf9HotSpot VM\u7684\u5b9e\u73b0\uff0c\u5b83\u91cc\u9762\u7684GC\u6309\u7167\u56de\u6536\u533a\u57df\u53c8\u5206\u4e3a\u4e24\u5927\u79cd\u7c7b\u578b\uff1a<\/p>\n<ul>\n<li>\u4e00\u79cd\u662f\u90e8\u5206\u6536\u96c6(Partial GC)<\/li>\n<li>\u4e00\u79cd\u662f\u6574\u5806\u6536\u96c6(Full GC)<\/li>\n<\/ul>\n<p><mark>\u90e8\u5206\u6536\u96c6(Partial GC)<\/mark>\uff1a\u4e0d\u662f\u5b8c\u6574\u6536\u96c6\u6574\u4e2aJava\u5806\u7684\u5783\u573e\u6536\u96c6\uff0c\u5176\u4e2d\u53c8\u5206\u4e3a:<\/p>\n<ul>\n<li><mark>\u65b0\u751f\u4ee3\u6536\u96c6(Minor GC\/Young GC):\u53ea\u662f\u65b0\u751f\u4ee3\u7684\u5783\u573e\u6536\u96c6<\/mark><\/li>\n<li><mark>\u8001\u5e74\u4ee3\u6536\u96c6(Major GC\/Old GC):\u53ea\u662f\u8001\u5e74\u4ee3\u7684\u5783\u573e\u6536\u96c6<\/mark><\/li>\n<li>\u6df7\u5408\u6536\u96c6(Mixed GC):\u6536\u96c6\u6574\u4e2a\u65b0\u751f\u4ee3\u4ee5\u53ca\u90e8\u5206\u8001\u5e74\u4ee3\u7684\u5783\u573e\u6536\u96c6\uff0c\u76ee\u524d\uff0c\u53ea\u6709G1 GC\u4f1a\u6709\u8fd9\u79cd\u884c\u4e3a<\/li>\n<\/ul>\n<p><mark>\u6574\u5806\u6536\u96c6(Full GC)<\/mark>\uff1a\u6536\u96c6\u6574\u4e2aJava\u5806\u548c\u65b9\u6cd5\u533a\u7684\u5783\u573e\u6536\u96c6<\/p>\n<blockquote><p><strong>\u6ce8\u610f\uff1aJVM\u5728\u8fdb\u884cGC\u65f6\uff0c\u5e76\u975e\u6bcf\u6b21\u90fd\u5bf9\u6240\u6709\u533a\u57df(\u65b0\u751f\u4ee3\uff0c\u8001\u5e74\u4ee3\uff0c\u65b9\u6cd5\u533a)\u4e00\u8d77\u56de\u6536\u7684\uff0c\u5927\u90e8\u5206\u65f6\u5019\u56de\u6536\u7684\u90fd\u662f\u6307\u65b0\u751f\u4ee3<\/strong><\/p><\/blockquote>\n<h2><a id=\"GC_111\"><\/a>GC\u7684\u89e6\u53d1\u673a\u5236<\/h2>\n<h3><a id=\"GCMinor_GC_112\"><\/a>\u5e74\u8f7b\u4ee3GC(Minor GC)\u89e6\u53d1\u673a\u5236<\/h3>\n<p>\u89e6\u53d1\u673a\u5236\uff1a<\/p>\n<ul>\n<li><mark>\u5f53\u5e74\u8f7b\u4ee3\u7a7a\u95f4\u4e0d\u8db3\u65f6\uff0c\u5c31\u4f1a\u89e6\u53d1Minor GC<\/mark>\uff0c<mark>\u8fd9\u91cc\u7684\u5e74\u8f7b\u4ee3\u7a7a\u95f4\u4e0d\u8db3\u6307\u7684\u662fEden\u533a\u6ee1\uff0cSurvivor\u533a\u6ee1\u4e0d\u4f1a\u89e6\u53d1GC<\/mark>(\u6bcf\u6b21Minor GC \u4f1a\u6e05\u7406\u5e74\u8f7b\u4ee3\u7684\u5185\u5b58)<\/li>\n<\/ul>\n<p>\u56e0\u4e3aJava\u5bf9\u8c61\u5927\u591a\u5177\u5907\u671d\u751f\u5915\u6b7b\u7684\u7279\u65b0\uff0c\u6240\u4ee5Minor GC\u975e\u5e38\u9891\u7e41\uff0c\u4e00\u822c\u56de\u6536\u901f\u5ea6\u4e5f\u6bd4\u8f83\u5feb.<br \/>\nMinor GC\u4f1a\u5f15\u53d1STW\uff08stop to world\uff09\uff0c\u6682\u505c\u5176\u4ed6\u7528\u6237\u7ebf\u7a0b\uff0c\u7b49\u5783\u573e\u56de\u6536\u7ed3\u675f\uff0c\u7528\u6237\u7ebf\u7a0b\u624d\u6062\u590d\u8fd0\u884c<\/p>\n<h3><a id=\"GCMajor_GCFull_GC_120\"><\/a>\u8001\u5e74\u4ee3GC(Major GC\/Full GC)\u89e6\u53d1\u673a\u5236<\/h3>\n<p>\u6307\u53d1\u751f\u5728\u8001\u5e74\u4ee3\u7684GC\uff0c\u5bf9\u8c61\u4ece\u8001\u5e74\u4ee3\u6d88\u5931\u65f6\uff0c\u6211\u4eec\u8bf4\"Major GC\u6216Full GC\"\u53d1\u751f\u4e86\u3001<\/p>\n<p>\u4e00\u822c\u51fa\u73b0Major GC\uff0c<mark>\u7ecf\u5e38\u4f1a\u4f34\u968f\u81f3\u5c11\u4e00\u6b21\u7684Minor GC<\/mark>(\u4f46\u975e\u7edd\u5bf9\u7684\uff0c\u5728Parallel Scavenge\u6536\u96c6\u5668\u7684\u6536\u96c6\u7b56\u7565\u91cc\u5c31\u6709\u76f4\u63a5\u8fdb\u884cMajor GC\u7684\u7b56\u7565\u9009\u62e9\u8fc7\u7a0b)<\/p>\n<p>\u89e6\u53d1\u673a\u5236\uff1a<\/p>\n<ul>\n<li><mark>\u4e5f\u5c31\u662f\u8001\u5e74\u4ee3\u7a7a\u95f4\u4e0d\u8db3\u65f6\uff0c\u4f1a\u5148\u5c1d\u8bd5\u89e6\u53d1Minor GC\uff0c\u5982\u679c\u4e4b\u540e\u7a7a\u95f4\u8fd8\u4e0d\u8db3\uff0c\u5219\u89e6\u53d1Major GC<\/mark><\/li>\n<\/ul>\n<blockquote><p>PS\uff1a<br \/>\nMajor GC\u7684\u901f\u5ea6\u4e00\u822c\u4f1a\u6bd4Minor GC\u616210\u500d\u4ee5\u4e0a\uff0cSTW\u7684\u65f6\u95f4\u66f4\u957f<br \/>\n\u5982\u679cMajor GC\u540e\uff0c\u5185\u5b58\u8fd8\u4e0d\u8db3\uff0c\u5c31\u62a5OOM\u4e86<br \/>\nMajor GC\u7684\u901f\u5ea6\u4e00\u822c\u4f1a\u6bd4Minor GC\u616210\u500d\u4ee5\u4e0a<\/p><\/blockquote>\n<h3><a id=\"Full_GC_135\"><\/a>Full GC\u89e6\u53d1\u673a\u5236<\/h3>\n<p>\u89e6\u53d1Full GC\u6267\u884c\u7684\u60c5\u51b5\u6709\u5982\u4e0b\u4e94\u79cd:<\/p>\n<ul>\n<li><mark>\u8c03\u7528System.gc()\uff0c\u7cfb\u7edf\u5efa\u8bae\u6267\u884cFull GC\uff0c\u4f46\u662f\u4e0d\u5fc5\u7136\u6267\u884c<\/mark><\/li>\n<li><mark>\u8001\u5e74\u4ee3\u7a7a\u95f4\u4e0d\u8db3<\/mark><\/li>\n<li><mark>\u65b9\u6cd5\u533a\u7a7a\u95f4\u4e0d\u8db3<\/mark><\/li>\n<li><mark>\u901a\u8fc7Minor GC\u540e\u8fdb\u5165\u8001\u5e74\u4ee3\u7684\u5e73\u5747\u5927\u5c0f\u5927\u4e8e\u8001\u5e74\u4ee3\u7684\u53ef\u7528\u5185\u5b58<\/mark><\/li>\n<li><mark>\u7531Eden\u533a\uff0cfrom\u533a\u5411to\u533a\u590d\u5236\u65f6\uff0c\u5bf9\u8c61\u5927\u5c0f\u5927\u4e8eto\u533a\u53ef\u7528\u5185\u5b58\uff0c\u5219\u628a\u5bf9\u8c61\u8f6c\u5b58\u5230\u8001\u5e74\u4ee3\uff0c\u5e76\u4e14\u8001\u5e74\u4ee3\u7684\u53ef\u7528\u5185\u5b58\u5c0f\u4e8e\u8be5\u5bf9\u8c61\u5927\u5c0f<\/mark>\uff08\u90a3\u8981\u662fGC\u4e4b\u540e\u8fd8\u4e0d\u591f\u5462\uff1f\u90a3\u8fd8\u7528\u8bf4\uff1aOOM\u5f02\u5e38\u9001\u4e0a\uff09<\/li>\n<\/ul>\n<blockquote><p>\u53e6\u5916\u8981\u7279\u522b\u6ce8\u610f: <strong>full GC\u662f\u5f00\u53d1\u6216\u8c03\u4f18\u4e2d\u5c3d\u91cf\u8981\u907f\u514d\u7684<\/strong><\/p><\/blockquote>\n<h2><a id=\"Java_146\"><\/a>\u4e3a\u4ec0\u4e48\u9700\u8981\u628aJava\u5806\u5206\u4ee3\uff1f<\/h2>\n<p>\u7ecf\u7814\u7a76\uff0c\u4e0d\u540c\u5bf9\u8c61\u7684\u751f\u547d\u5468\u671f\u4e0d\u540c\uff0c70%-99%\u7684\u5bf9\u8c61\u662f\u4e34\u65f6\u5bf9\u8c61<\/p>\n<p>\u5176\u5b9e\u4e0d\u5206\u4ee3\u5b8c\u5168\u53ef\u4ee5\uff0c\u5206\u4ee3\u7684\u552f\u4e00\u7406\u7531\u5c31\u662f\u4f18\u5316GC\u6027\u80fd\uff0c\u5982\u679c\u6ca1\u6709\u5206\u4ee3\uff0c\u90a3\u6240\u6709\u7684\u5bf9\u8c61\u90fd\u5728\u4e00\u4e2a\u533a\u57df\uff0c\u5f53\u9700\u8981\u8fdb\u884cGC\u7684\u65f6\u5019\u5c31\u9700\u8981\u628a\u6240\u6709\u7684\u5bf9\u8c61\u90fd\u8fdb\u884c\u904d\u5386\uff0cGC\u7684\u65f6\u5019\u4f1a\u6682\u505c\u7528\u6237\u7ebf\u7a0b\uff0c\u90a3\u4e48\u8fd9\u6837\u7684\u8bdd\uff0c\u5c31\u975e\u5e38\u6d88\u8017\u6027\u80fd\uff0c\u7136\u800c\u5927\u90e8\u5206\u5bf9\u8c61\u90fd\u662f\u671d\u751f\u5915\u6b7b\u7684\uff0c\u4f55\u4e0d\u628a\u6d3b\u5f97\u4e45\u7684\u671d\u751f\u5915\u6b7b\u7684\u5bf9\u8c61\u8fdb\u884c\u5206\u4ee3\u5462\uff0c\u8fd9\u6837\u7684\u8bdd\uff0c\u53ea\u9700\u8981\u5bf9\u8fd9\u4e9b\u671d\u751f\u5915\u6b7b\u7684\u5bf9\u8c61\u8fdb\u884c\u56de\u6536\u5c31\u884c\u4e86.\u603b\u4e4b\uff0c\u5bb9\u6613\u6b7b\u7684\u533a\u57df\u9891\u7e41\u56de\u6536\uff0c\u4e0d\u5bb9\u6613\u6b7b\u7684\u533a\u57df\u51cf\u5c11\u56de\u6536.<\/p>\n<p>\u8fd9\u4e2a\u5176\u5b9e\u4e5f\u662f\u57fa\u4e8e\u5206\u4ee3\u56de\u6536\u7406\u8bba\u7684\uff0c\u8be6\u60c5\u53ef\u4ee5\u53c2\u8003\u6211\u7684\u53e6\u4e00\u7bc7\u535a\u6587\uff1a<a href=\"https:\/\/blog.csdn.net\/weixin_45525272\/article\/details\/126473167\" target=\"_blank\"  rel=\"nofollow\" >https:\/\/blog.csdn.net\/weixin_45525272\/article\/details\/126473167<\/a><\/p>\n<h1><a id=\"JVMGC_153\"><\/a>JVM\u4e2d\u4e00\u6b21\u5b8c\u6574\u7684GC\u6d41\u7a0b\u662f\u600e\u6837\u7684\uff1f<\/h1>\n<p>\u65b0\u521b\u5efa\u7684\u5bf9\u8c61\u4e00\u822c\u4f1a\u88ab\u5206\u914d\u5728\u65b0\u751f\u4ee3\u4e2d\uff0c\u5e38\u7528\u7684\u65b0\u751f\u4ee3\u7684\u5783\u573e\u56de\u6536\u5668\u662f ParNew \u5783\u573e\u56de\u6536\u5668\uff0c\u5b83\u6309\u71678:1:1 \u5c06\u65b0\u751f\u4ee3\u5206\u6210 Eden \u533a\uff0c\u4ee5\u53ca\u4e24\u4e2a Survivor \u533a\u3002<mark>\u67d0\u4e00\u65f6\u523b\uff0c\u6211\u4eec\u521b\u5efa\u7684\u5bf9\u8c61\u5c06 Eden \u533a\u5168\u90e8\u6324\u6ee1\uff0c\u8fd9\u4e2a\u5bf9\u8c61\u5c31\u662f\u6324\u6ee1\u65b0\u751f\u4ee3\u7684\u6700\u540e\u4e00\u4e2a\u5bf9\u8c61<\/mark>\u3002\u6b64\u65f6\uff0c<mark>Minor GC \u5c31\u89e6\u53d1\u4e86<\/mark>\u3002<\/p>\n<p><mark>\u5728\u6b63\u5f0f Minor GC \u524d\uff0cJVM \u4f1a\u5148\u68c0\u67e5\u65b0\u751f\u4ee3\u4e2d\u5bf9\u8c61\uff0c\u662f\u6bd4\u8001\u5e74\u4ee3\u4e2d\u5269\u4f59\u7a7a\u95f4\u5927\u8fd8\u662f\u5c0f<\/mark>\u3002<\/p>\n<blockquote><p>\u4e3a\u4ec0\u4e48\u8981\u505a\u8fd9\u6837\u7684\u68c0\u67e5\u5462\uff1f<br \/>\n\u539f\u56e0\u5f88\u7b80\u5355\uff0c\u5047\u5982 Minor GC \u4e4b\u540e Survivor \u533a\u653e\u4e0d\u4e0b\u5269\u4f59\u5bf9\u8c61\uff0c\u8fd9\u4e9b\u5bf9\u8c61\u5c31\u8981\u8fdb\u5165\u5230\u8001\u5e74\u4ee3\uff0c\u6240\u4ee5\u8981\u63d0\u524d\u68c0\u67e5\u8001\u5e74\u4ee3\u662f\u4e0d\u662f\u591f\u7528\u3002<\/p><\/blockquote>\n<p>\u8fd9\u6837\u5c31\u6709\u4e24\u79cd\u60c5\u51b5\uff1a<\/p>\n<ol>\n<li><mark>\u8001\u5e74\u4ee3\u5269\u4f59\u7a7a\u95f4\u5927\u4e8e\u65b0\u751f\u4ee3\u4e2d\u7684\u5bf9\u8c61\u5927\u5c0f\uff0c\u90a3\u5c31\u76f4\u63a5Minor GC\uff0cGC\u5b8csurvivor\u4e0d\u591f\u653e\uff0c\u8001\u5e74\u4ee3\u4e5f\u7edd\u5bf9\u591f\u653e<\/mark>\uff1b<\/li>\n<li><mark>\u8001\u5e74\u4ee3\u5269\u4f59\u7a7a\u95f4\u5c0f\u4e8e\u65b0\u751f\u4ee3\u4e2d\u7684\u5bf9\u8c61\u5927\u5c0f\uff0c\u8fd9\u4e2a\u65f6\u5019\u5c31\u8981\u67e5\u770b\u662f\u5426\u542f\u7528\u4e86\u201c\u8001\u5e74\u4ee3\u7a7a\u95f4\u5206\u914d\u62c5\u4fdd\u89c4\u5219\u201d<\/mark>\uff0c\u5177\u4f53\u6765\u8bf4\u5c31\u662f\u770b -XX:-HandlePromotionFailure \u53c2\u6570\u662f\u5426\u8bbe\u7f6e\u4e86\u3002<br \/>\n<blockquote><p>\u8001\u5e74\u4ee3\u7a7a\u95f4<strong>\u5206\u914d\u62c5\u4fdd\u89c4\u5219<\/strong>\u662f\u8fd9\u6837\u7684\uff0c\u5982\u679c\u8001\u5e74\u4ee3\u4e2d\u5269\u4f59\u7a7a\u95f4\u5927\u5c0f\uff0c\u5927\u4e8e\u5386\u6b21 Minor GC \u4e4b\u540e\u5269\u4f59\u5bf9\u8c61\u7684\u5927\u5c0f\uff0c\u90a3\u5c31\u5141\u8bb8\u8fdb\u884c Minor GC\u3002<br \/>\n\u56e0\u4e3a\u4ece\u6982\u7387\u4e0a\u6765\u8bf4\uff0c\u4ee5\u524d\u7684\u653e\u7684\u4e0b\uff0c\u8fd9\u6b21\u7684\u4e5f\u5e94\u8be5\u653e\u7684\u4e0b\u3002<\/p><\/blockquote>\n<\/li>\n<\/ol>\n<ul>\n<li>\u5206\u914d\u62c5\u4fdd\u89c4\u5219\u6b64\u65f6\u4e5f\u6709\u4e24\u79cd\u60c5\u51b5\uff1a\n<ul>\n<li><mark>\u8001\u5e74\u4ee3\u4e2d\u5269\u4f59\u7a7a\u95f4\u5927\u5c0f\uff0c\u5927\u4e8e\u5386\u6b21Minor GC\u4e4b\u540e\u5269\u4f59\u5bf9\u8c61\u7684\u5927\u5c0f\uff0c\u8fdb\u884c Minor GC<\/mark>\uff1b<\/li>\n<li><mark>\u8001\u5e74\u4ee3\u4e2d\u5269\u4f59\u7a7a\u95f4\u5927\u5c0f\uff0c\u5c0f\u4e8e\u5386\u6b21Minor GC\u4e4b\u540e\u5269\u4f59\u5bf9\u8c61\u7684\u5927\u5c0f\uff0c\u8fdb\u884cFull GC\uff0c\u628a\u8001\u5e74\u4ee3\u7a7a\u51fa\u6765\u518d\u68c0\u67e5<\/mark>\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u5f00\u542f\u8001\u5e74\u4ee3\u7a7a\u95f4\u5206\u914d\u62c5\u4fdd\u89c4\u5219\u53ea\u80fd\u8bf4\u662f\u5927\u6982\u7387\u4e0a\u6765\u8bf4\uff0cMinor GC \u5269\u4f59\u540e\u7684\u5bf9\u8c61\u591f\u653e\u5230\u8001\u5e74\u4ee3\uff0c\u6240\u4ee5\u5f53\u7136\u4e5f\u4f1a\u6709\u4e07\u4e00\uff0cMinor GC \u540e\u4f1a\u6709\u8fd9\u6837\u4e09\u79cd\u60c5\u51b5\uff1a<\/p>\n<ol>\n<li><mark>Minor GC \u4e4b\u540e\u7684\u5bf9\u8c61\u8db3\u591f\u653e\u5230 Survivor \u533a\uff0c\u7686\u5927\u6b22\u559c\uff0cGC \u7ed3\u675f<\/mark>\uff1b<\/li>\n<li><mark>Minor GC \u4e4b\u540e\u7684\u5bf9\u8c61\u4e0d\u591f\u653e\u5230 Survivor \u533a\uff0c\u63a5\u7740\u8fdb\u5165\u5230\u8001\u5e74\u4ee3\uff0c\u8001\u5e74\u4ee3\u80fd\u653e\u4e0b\uff0c\u90a3\u4e5f\u53ef\u4ee5\uff0cGC\u7ed3\u675f\uff1b<\/mark><\/li>\n<li><mark>Minor GC \u4e4b\u540e\u7684\u5bf9\u8c61\u4e0d\u591f\u653e\u5230 Survivor \u533a\uff0c\u8001\u5e74\u4ee3\u4e5f\u653e\u4e0d\u4e0b\uff0c\u90a3\u5c31\u53ea\u80fd Full GC<\/mark>\u3002<\/li>\n<\/ol>\n<p>\u524d\u9762\u90fd\u662f\u6210\u529f GC \u7684\u4f8b\u5b50\uff0c\u8fd8\u6709 3 \u4e2d\u60c5\u51b5\uff0c\u4f1a\u5bfc\u81f4 GC \u5931\u8d25\uff0c\u62a5 OOM\uff1a<\/p>\n<ol>\n<li><mark>\u7d27\u63a5\u4e0a\u4e00\u8282 Full GC \u4e4b\u540e\uff0c\u8001\u5e74\u4ee3\u4efb\u7136\u653e\u4e0d\u4e0b\u5269\u4f59\u5bf9\u8c61\uff0c\u5c31\u53ea\u80fd OOM<\/mark>\uff1b<\/li>\n<li><mark>\u672a\u5f00\u542f\u8001\u5e74\u4ee3\u5206\u914d\u62c5\u4fdd\u673a\u5236\uff0c\u4e14\u4e00\u6b21 Full GC \u540e\uff0c\u8001\u5e74\u4ee3\u4efb\u7136\u653e\u4e0d\u4e0b\u5269\u4f59\u5bf9\u8c61\uff0c\u4e5f\u53ea\u80fd OOM<\/mark>\uff1b<\/li>\n<li><mark>\u5f00\u542f\u8001\u5e74\u4ee3\u5206\u914d\u62c5\u4fdd\u673a\u5236\uff0c\u4f46\u662f\u62c5\u4fdd\u4e0d\u901a\u8fc7\uff0c\u4e00\u6b21 Full GC \u540e\uff0c\u8001\u5e74\u4ee3\u4efb\u7136\u653e\u4e0d\u4e0b\u5269\u4f59\u5bf9\u8c61\uff0c\u4e5f\u662f\u80fd OOM<\/mark>\u3002<\/li>\n<\/ol>\n<h1><a id=\"JVM_GC_183\"><\/a>JVM GC\u6ce8\u610f\u70b9\uff1a<\/h1>\n<h2><a id=\"Full_GC_184\"><\/a>Full GC\u4f1a\u5bfc\u81f4\u4ec0\u4e48\uff1f<\/h2>\n<p>Full GC\u4f1a\u201cStop The World\u201d\uff0c\u5373\u5728GC\u671f\u95f4\u5168\u7a0b\u6682\u505c\u7528\u6237\u7684\u5e94\u7528\u7a0b\u5e8f\u3002\u6240\u4ee5\u8bf4\u6211\u4eec\u5f00\u53d1\u7684\u65f6\u5019\u5c3d\u91cf\u5c11\u8ba9\u4ed6Full GC\u3002<\/p>\n<h2><a id=\"JVMGC_187\"><\/a>JVM\u4ec0\u4e48\u65f6\u5019\u89e6\u53d1GC\uff1f<\/h2>\n<p>\u6211\u4eec\u5bf9\u4e0a\u9762\u7684\u6d41\u7a0b\u8fdb\u884c\u603b\u7ed3\uff0c\u4e5f\u5c31\u662f\u8bf4\uff1a<br \/>\n\u5f53 Eden \u533a\u7684\u7a7a\u95f4\u8017\u5c3d\u65f6 Java \u865a\u62df\u673a\u4fbf\u4f1a\u89e6\u53d1\u4e00\u6b21 Minor GC \u6765\u6536\u96c6\u65b0\u751f\u4ee3\u7684\u5783\u573e\uff0c\u5b58\u6d3b\u4e0b\u6765\u7684\u5bf9\u8c61\uff0c\u5219\u4f1a\u88ab\u9001\u5230 Survivor \u533a\uff0c\u7b80\u5355\u8bf4\u5c31\u662f\u5f53<mark>\u65b0\u751f\u4ee3\u7684Eden\u533a\u6ee1\u7684\u65f6\u5019\u89e6\u53d1 Minor GC<\/mark>\u3002<\/p>\n<p>serial GC \u4e2d\uff0c<mark>\u8001\u5e74\u4ee3\u5185\u5b58\u5269\u4f59\u5df2\u7ecf\u5c0f\u4e8e\u4e4b\u524d\u5e74\u8f7b\u4ee3\u664b\u5347\u8001\u5e74\u4ee3\u7684\u5e73\u5747\u5927\u5c0f\uff0c\u5219\u8fdb\u884c Full GC<\/mark>\u3002\u800c\u5728 CMS \u7b49\u5e76\u53d1\u6536\u96c6\u5668\u4e2d\u5219\u662f\u6bcf\u9694\u4e00\u6bb5\u65f6\u95f4\u68c0\u67e5\u4e00\u4e0b\u8001\u5e74\u4ee3\u5185\u5b58\u7684\u4f7f\u7528\u91cf\uff0c\u8d85\u8fc7\u4e00\u5b9a\u6bd4\u4f8b\u65f6\u8fdb\u884c Full GC \u56de\u6536\u3002<\/p>\n<h2><a id=\"FullGC_194\"><\/a>\u5982\u4f55\u51cf\u5c11FullGC\u7684\u6b21\u6570\uff1f<\/h2>\n<p>\u53ef\u4ee5\u91c7\u7528\u4ee5\u4e0b\u63aa\u65bd\u6765\u51cf\u5c11Full GC\u7684\u6b21\u6570\uff1a<\/p>\n<ol>\n<li>\u589e\u52a0\u65b9\u6cd5\u533a\u7684\u7a7a\u95f4\uff1b<\/li>\n<li>\u589e\u52a0\u8001\u5e74\u4ee3\u7684\u7a7a\u95f4\uff1b<\/li>\n<li>\u51cf\u5c11\u65b0\u751f\u4ee3\u7684\u7a7a\u95f4\uff1b<\/li>\n<li>\u7981\u6b62\u4f7f\u7528System.gc()\u65b9\u6cd5\uff1b<\/li>\n<li>\u4f7f\u7528\u6807\u8bb0-\u6574\u7406\u7b97\u6cd5\uff0c\u5c3d\u91cf\u4fdd\u6301\u8f83\u5927\u7684\u8fde\u7eed\u5185\u5b58\u7a7a\u95f4\uff1b<\/li>\n<li>\u6392\u67e5\u4ee3\u7801\u4e2d\u65e0\u7528\u7684\u5927\u5bf9\u8c61\u3002<\/li>\n<\/ol>\n<h2><a id=\"_203\"><\/a>\u4e3a\u4ec0\u4e48\u8001\u5e74\u4ee3\u4e0d\u80fd\u4f7f\u7528\u6807\u8bb0\u590d\u5236\uff1f<\/h2>\n<p>\u56e0\u4e3a\u8001\u5e74\u4ee3\u4fdd\u7559\u7684\u5bf9\u8c61\u90fd\u662f\u96be\u4ee5\u6d88\u4ea1\u7684\uff0c\u800c\u6807\u8bb0\u590d\u5236\u7b97\u6cd5\u5728\u5bf9\u8c61\u5b58\u6d3b\u7387\u8f83\u9ad8\u65f6\u5c31\u8981\u8fdb\u884c\u8f83\u591a\u7684\u590d\u5236\u64cd\u4f5c\uff0c\u6548\u7387\u5c06\u4f1a\u964d\u4f4e\uff0c\u6240\u4ee5\u5728\u8001\u5e74\u4ee3\u4e00\u822c\u4e0d\u80fd\u76f4\u63a5\u9009\u7528\u8fd9\u79cd\u7b97\u6cd5\u3002<\/p>\n<h2><a id=\"EdenSurvivor_207\"><\/a>\u65b0\u751f\u4ee3\u4e3a\u4ec0\u4e48\u8981\u5206\u4e3aEden\u548cSurvivor\uff1f<\/h2>\n<p>\u73b0\u5728\u7684\u5546\u7528Java\u865a\u62df\u673a\u5927\u591a\u90fd\u4f18\u5148\u91c7\u7528\u4e86\u201c\u6807\u8bb0-\u590d\u5236\u7b97\u6cd5\u201d\u53bb\u56de\u6536\u65b0\u751f\u4ee3\uff0c\u8be5\u7b97\u6cd5\u65e9\u671f\u91c7\u7528\u201c\u534a\u533a\u590d\u5236\u201d\u7684\u673a\u5236\u8fdb\u884c\u5783\u573e\u56de\u6536\u3002\u5b83\u5c06\u53ef\u7528\u5185\u5b58\u6309\u5bb9\u91cf\u5212\u5206\u4e3a\u5927\u5c0f\u76f8\u7b49\u7684\u4e24\u5757\uff0c\u6bcf\u6b21\u53ea\u4f7f\u7528\u5176\u4e2d\u7684\u4e00\u5757\u3002\u5f53\u8fd9\u4e00\u5757\u7684\u5185\u5b58\u7528\u5b8c\u4e86\uff0c\u5c31\u5c06\u8fd8\u5b58\u6d3b\u7740\u7684\u5bf9\u8c61\u590d\u5236\u5230\u53e6\u5916\u4e00\u5757\u4e0a\u9762\uff0c\u7136\u540e\u518d\u628a\u5df2\u4f7f\u7528\u8fc7\u7684\u5185\u5b58\u7a7a\u95f4\u4e00\u6b21\u6e05\u7406\u6389\u3002\u8fd9\u6837\u5b9e\u73b0\u7b80\u5355\uff0c\u8fd0\u884c\u9ad8\u6548\uff0c\u4e0d\u8fc7\u5176\u7f3a\u9677\u4e5f\u663e\u800c\u6613\u89c1\uff0c\u8fd9\u79cd\u590d\u5236\u56de\u6536\u7b97\u6cd5\u7684\u4ee3\u4ef7\u662f\u5c06\u53ef\u7528\u5185\u5b58\u7f29\u5c0f\u4e3a\u4e86\u539f\u6765\u7684\u4e00\u534a\uff0c\u7a7a\u95f4\u6d6a\u8d39\u672a\u514d\u592a\u591a\u4e86\u4e00\u70b9\u3002<\/p>\n<h2><a id=\"Survivor_211\"><\/a>\u4e3a\u4ec0\u4e48\u8981\u8bbe\u7f6e\u4e24\u4e2aSurvivor\u533a\u57df\uff1f<\/h2>\n<p><mark>\u8bbe\u7f6e\u4e24\u4e2a Survivor \u533a\u6700\u5927\u7684\u597d\u5904\u5c31\u662f\u89e3\u51b3\u5185\u5b58\u788e\u7247\u5316<\/mark>\u3002<\/p>\n<p>\u6211\u4eec\u5148\u5047\u8bbe\u4e00\u4e0b\uff0cSurvivor \u53ea\u6709\u4e00\u4e2a\u533a\u57df\u4f1a\u600e\u6837\u3002Minor GC \u6267\u884c\u540e\uff0cEden \u533a\u88ab\u6e05\u7a7a\u4e86\uff0c\u5b58\u6d3b\u7684\u5bf9\u8c61\u653e\u5230\u4e86 Survivor \u533a\uff0c\u800c<mark>\u4e4b\u524d Survivor \u533a\u4e2d\u7684\u5bf9\u8c61\uff0c\u53ef\u80fd\u4e5f\u6709\u4e00\u4e9b\u662f\u9700\u8981\u88ab\u6e05\u9664\u7684<\/mark>\u3002\u95ee\u9898\u6765\u4e86\uff0c\u8fd9\u65f6\u5019\u6211\u4eec\u600e\u4e48\u6e05\u9664\u5b83\u4eec\uff1f<\/p>\n<p>\u5728\u8fd9\u79cd\u573a\u666f\u4e0b\uff0c<mark>\u6211\u4eec\u53ea\u80fd\u6807\u8bb0\u6e05\u9664<\/mark>\uff0c\u800c\u6211\u4eec\u77e5\u9053\u6807\u8bb0\u6e05\u9664\u6700\u5927\u7684\u95ee\u9898\u5c31\u662f\u5185\u5b58\u788e\u7247\uff0c\u5728\u65b0\u751f\u4ee3\u8fd9\u79cd\u7ecf\u5e38\u4f1a\u6d88\u4ea1\u7684\u533a\u57df\uff0c<mark>\u91c7\u7528\u6807\u8bb0\u6e05\u9664\u5fc5\u7136\u4f1a\u8ba9\u5185\u5b58\u4ea7\u751f\u4e25\u91cd\u7684\u788e\u7247\u5316<\/mark>\u3002<\/p>\n<p>\u4f46\u662f\u6211\u4eec\u73b0\u5728\u8bbe\u7f6e\u4e24\u4e2aSurvivor\u533a\uff0c\u56e0\u4e3aSurvivor\u6709 2 \u4e2a\u533a\u57df\uff0c\u6240\u4ee5\u6bcf\u6b21 Minor GC\uff0c\u4f1a\u5c06\u4e4b\u524d Eden \u533a\u548c From \u533a\u4e2d\u7684\u5b58\u6d3b\u5bf9\u8c61\u590d\u5236\u5230 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href=\"https:\/\/csdnimg.cn\/release\/blogv2\/dist\/mdeditor\/css\/editerView\/markdown_views-98b95bb57c.css\" rel=\"stylesheet\">\n \t<link href=\"https:\/\/csdnimg.cn\/release\/blogv2\/dist\/mdeditor\/css\/style-c216769e99.css\" rel=\"stylesheet\">\u672c\u7bc7\u6587\u7ae0\u6765\u6e90\u4e8eCSDN\uff1ahttps:\/\/blog.csdn.net\/weixin_45525272\/article\/details\/126469398<\/p>\n","raw":"","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u76ee\u5f55 \u54ea\u4e9b\u5185\u5b58\u9700\u8981\u56de\u6536 \u56de\u6536\u5806\uff1a\u5783\u573e\u7684\u5b9a\u4e49 \u5f15\u7528\u8ba1\u6570\u7b97\u6cd5\uff1a \u53ef\u8fbe\u6027\u5206\u6790\u7b97\u6cd5\uff1a GC Roots\u7684\u5bf9\u8c61 \u56de\u6536\u65b9\u6cd5\u533a\uff1a\u5783\u573e\u7684\u5b9a\u4e49  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