{"id":573,"date":"2019-10-10T17:58:05","date_gmt":"2019-10-10T09:58:05","guid":{"rendered":"http:\/\/weitaoc.com\/?p=573"},"modified":"2019-10-10T18:17:11","modified_gmt":"2019-10-10T10:17:11","slug":"%e5%9e%83%e5%9c%be%e5%9b%9e%e6%94%b6%e5%99%a8","status":"publish","type":"post","link":"http:\/\/weitaoc.com\/?p=573","title":{"rendered":"\u5783\u573e\u56de\u6536\u5668"},"content":{"rendered":"\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u4ec0\u4e48\u662f\u5783\u573e\u56de\u6536\u5668<\/p><cite>Java\u5783\u573e\u56de\u6536\u5668\u662fJava\u865a\u62df\u673a(JVM)\u7684\u4e09\u4e2a\u91cd\u8981\u6a21\u5757(\u53e6\u5916\u4e24\u4e2a\u662f\u89e3\u91ca\u5668\u548c\u591a\u7ebf\u7a0b\u673a\u5236)\u4e4b\u4e00\uff0c\u4e3a\u5e94\u7528\u7a0b\u5e8f\u63d0\u4f9b\u5185\u5b58\u7684\u81ea\u52a8\u5206\u914d(Memory Allocation)\u3001\u81ea\u52a8\u56de\u6536(Garbage Collect)\u529f\u80fd <\/cite><\/blockquote>\n\n\n\n<p>\u5185\u5b58\u7684\u5206\u914d\u548c\u56de\u6536\u90fd\u53d1\u751f\u5728Java\u5806\u4e0a(\u4e00\u6bb5\u5185\u5b58\u5757)\u3002\u67d0\u4e00\u4e2a\u65f6\u70b9\uff0c\u4e00\u4e2a\u5bf9\u8c61\u5982\u679c\u6709\u4e00\u4e2a\u4ee5\u4e0a\u7684\u5f15\u7528(Rreference)\u6307\u5411\u5b83\uff0c\u90a3\u4e48\u8be5\u5bf9\u8c61\u5c31\u4e3a\u6d3b\u7740\u7684(Live)\uff0c\u5426\u5219\u6b7b\u4ea1(Dead)\uff0c\u89c6\u4e3a\u5783\u573e\uff0c\u53ef\u88ab\u5783\u573e\u56de\u6536\u5668\u56de\u6536\u518d\u5229\u7528\u3002\u5783\u573e\u56de\u6536\u64cd\u4f5c\u9700\u8981\u6d88\u8017CPU\u3001\u7ebf\u7a0b\u3001\u65f6\u95f4\u7b49\u8d44\u6e90\uff0c\u6240\u4ee5\u5bb9\u6613\u7406\u89e3\u7684\u662f\u5783\u573e\u56de\u6536\u64cd\u4f5c\u4e0d\u662f\u5b9e\u65f6\u7684\u53d1\u751f(\u5bf9\u8c61\u6b7b\u4ea1\u9a6c\u4e0a\u91ca\u653e)\uff0c\u5f53\u5185\u5b58\u6d88\u8017\u5b8c\u6216\u8005\u662f\u8fbe\u5230\u67d0\u4e00\u4e2a\u6307\u6807(Threshold,\u4f7f\u7528\u5185\u5b58\u5360\u603b\u5185\u5b58\u7684\u6bd4\u5217\uff0c\u6bd4\u59820.75)\u65f6\uff0c\u89e6\u53d1\u5783\u573e\u56de\u6536\u64cd\u4f5c\u3002\u6709\u4e00\u4e2a\u5bf9\u8c61\u6b7b\u4ea1\u7684\u5916\uff0cjava.lang.Thread\u7c7b\u578b\u7684\u5bf9\u8c61\u5373\u4f7f\u6ca1\u6709\u5f15\u7528\uff0c\u53ea\u8981\u7ebf\u7a0b\u8fd8\u5728\u8fd0\u884c\uff0c\u5c31\u4e0d\u4f1a\u88ab\u56de\u6536\u3002<\/p>\n\n\n\n<p><strong>\u4e32\u884c\u56de\u6536\u5668(Serial Collector) <\/strong>\uff0c\u7ebf\u7a0b\u6267\u884c\u56de\u6536\u64cd\u4f5c\uff0c\u56de\u6536\u671f\u95f4\u6682\u505c\u6240\u6709\u5e94\u7528\u7ebf\u7a0b\u7684\u6267\u884c\uff0cclient\u6a21\u5f0f\u4e0b\u7684\u9ed8\u8ba4\u56de\u6536\u5668\u3002<\/p>\n\n\n\n<p>\u5e74\u8f7b\u4ee3\u7684\u56de\u6536\u7b97\u6cd5(Minor Collection) \uff0c\u628aEden\u533a\u7684\u5b58\u6d3b\u5bf9\u8c61\u79fb\u5230To\u533a\uff0cTo\u533a\u88c5\u4e0d\u4e0b\u76f4\u63a5\u79fb\u5230\u8001\u5e74\u4ee3\uff0c\u628aFrom\u533a\u7684\u79fb\u5230To\u533a\uff0cTo\u533a\u88c5\u4e0d\u4e0b\u76f4\u63a5\u79fb\u5230\u8001\u5e74\u4ee3\uff0cFrom\u533a\u91cc\u9762\u5e74\u9f84\u5f88\u5927\u7684\u5347\u7ea7\u5230\u8001\u5e74\u4ee3\u3002 \u56de\u6536\u7ed3\u675f\u4e4b\u540e\uff0cEden\u548cFrom\u533a\u90fd\u4e3a\u7a7a\uff0c\u6b64\u65f6\u628aFrom\u548cTo\u7684\u529f\u80fd\u4e92\u6362\uff0cFrom\u53d8To\uff0cTo\u53d8From\uff0c\u6bcf\u4e00\u8f6e\u56de\u6536\u4e4b\u524dTo\u90fd\u662f\u7a7a\u7684\u3002\u8bbe\u8ba1\u7684\u9009\u578b\u4e3a<strong>\u590d\u5236<\/strong>\u3002<\/p>\n\n\n\n<p>\u8001\u5e74\u4ee3\u7684\u56de\u6536\u7b97\u6cd5(Full Collection)\uff0c\u8001\u5e74\u4ee3\u7684\u56de\u6536\u5206\u4e3a\u4e09\u4e2a\u6b65\u9aa4\uff0c\u6807\u8bb0(Mark)\u3001\u6e05\u9664(Sweep)\u3001\u5408\u5e76(Compact)\u3002\u6807\u8bb0\u9636\u6bb5\u628a\u6240\u6709\u5b58\u6d3b\u7684\u5bf9\u8c61\u6807\u8bb0\u51fa\u6765\uff0c\u6e05\u9664\u9636\u6bb5\u91ca\u653e\u6240\u6709\u6b7b\u4ea1\u7684\u5bf9\u8c61\uff0c\u5408\u5e76\u9636\u6bb5 \u628a\u6240\u6709\u6d3b\u7740\u7684\u5bf9\u8c61\u5408\u5e76\u5230\u5e74\u8001\u4ee3\u7684\u524d\u90e8\u5206\uff0c\u628a\u7a7a\u95f2\u7684\u7247\u6bb5\u90fd\u7559\u5230\u540e\u9762\u3002\u8bbe\u8ba1\u7684\u9009\u578b\u4e3a<strong>\u6807\u8bb0\u6574\u7406<\/strong>\uff0c\u51cf\u5c11\u5185\u5b58\u7684\u788e\u7247\u3002<\/p>\n\n\n\n<p><strong>\u5e76\u884c\u56de\u6536\u5668(ParNew)<\/strong>\uff0cParNew\u56de\u6536\u5668\u662f\u4e00\u4e2a\u5de5\u4f5c\u5728<strong>\u65b0\u751f\u4ee3\u7684\u5783\u573e\u6536\u5668<\/strong>\uff0c\u4ed6\u53ea\u662f\u7b80\u5355\u7684\u5c06\u4e32\u884c\u56de\u6536\u5668\u591a\u7ebf\u7a0b\u5316\uff0c\u56de\u6536\u7b56\u7565\u548c\u7b97\u6cd5\u548c\u4e32\u884c\u56de\u6536\u5668\u4e00\u6837\u3002<\/p>\n\n\n\n<p><strong>\u5e76\u884c\u56de\u6536\u96c6\u5668(ParallelGC)<\/strong>\uff0cParallelOldGC\u56de\u6536\u671f\u662f\u4e00\u4e2a<strong>\u8001\u5e74\u4ee3\u5783\u573e\u56de\u6536\u5668<\/strong>\uff0c\u8bbe\u8ba1\u9009\u578b\u4e3a<strong>\u6807\u8bb0\u6574\u7406<\/strong>\u3002<\/p>\n\n\n\n<p><strong>CMS(\u5e76\u53d1GC)\u6536\u96c6\u5668<\/strong>\uff0c\u4e5f\u662f\u4e00\u4e2a<strong>\u8001\u5e74\u4ee3\u5783\u573e\u56de\u6536\u5668<\/strong>\uff0c\u57fa\u4e8e<strong>\u6807\u8bb0\u6e05\u7406<\/strong>\u5b9e\u73b0\u3002<\/p>\n\n\n\n<p><strong>\u8fc7\u7a0b<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u521d\u59cb\u6807\u8bb0(CMS initial mark)\uff0c\u72ec\u5360PUC\uff0c\u4ec5\u6807\u8bb0GCroots\u80fd\u76f4\u63a5\u5173\u8054\u7684\u5bf9\u8c61<\/li><li>\u5e76\u53d1\u6807\u8bb0(CMS concurrenr mark)\uff0c\u53ef\u4ee5\u548c\u7528\u6237\u7ebf\u7a0b\u5e76\u884c\u6267\u884c\uff0c\u6807\u8bb0\u6240\u6709\u53ef\u8fbe\u5bf9\u8c61 <\/li><li> \u91cd\u65b0\u6807\u8bb0(CMS remark) \uff0c\u72ec\u5360CPU(STW)\uff0c\u5bf9\u5e76\u53d1\u6807\u8bb0\u9636\u6bb5\u7528\u6237\u7ebf\u7a0b\u8fd0\u884c\u4ea7\u751f\u7684\u5783\u573e\u5bf9\u8c61\u8fdb\u884c\u6807\u8bb0\u4fee\u6b63<\/li><li> \u5e76\u53d1\u6e05\u9664(CMS concurrent sweep) \uff0c\u53ef\u4ee5\u548c\u7528\u6237\u7ebf\u7a0b\u5e76\u884c\u6267\u884c\uff0c\u6e05\u7406\u5783\u573e  <\/li><\/ul>\n\n\n\n<p>\u5176\u4e2d\u521d\u59cb\u6807\u8bb0\u3001\u91cd\u65b0\u6807\u8bb0\u8fd9\u4e24\u4e2a\u6b65\u9aa4\u4efb\u7136\u9700\u8981\u505c\u987f\u5176\u4ed6\u7528\u6237\u7ebf\u7a0b\u3002\u521d\u59cb\u6807\u8bb0\u4ec5\u4ec5\u53ea\u662f\u6807\u8bb0\u51faGC ROOTS\u80fd\u76f4\u63a5\u5173\u8054\u5230\u7684\u5bf9\u8c61\uff0c\u901f\u5ea6\u5f88\u5feb\uff0c\u5e76\u53d1\u6807\u8bb0\u9636\u6bb5\u662f\u8fdb\u884cGC ROOTS \u6839\u641c\u7d22\u7b97\u6cd5\u9636\u6bb5\uff0c\u4f1a\u5224\u5b9a\u5bf9\u8c61\u662f\u5426\u5b58\u6d3b\u3002\u800c\u91cd\u65b0\u6807\u8bb0\u9636\u6bb5\u5219\u662f\u4e3a\u4e86\u4fee\u6b63\u5e76\u53d1\u6807\u8bb0\u671f\u95f4\uff0c\u56e0\u7528\u6237\u7a0b\u5e8f\u7ee7\u7eed\u8fd0\u884c\u800c\u5bfc\u81f4\u6807\u8bb0\u4ea7\u751f\u53d8\u52a8\u7684\u90a3\u4e00\u90e8\u5206\u5bf9\u8c61\u7684\u6807\u8bb0\u8bb0\u5f55\uff0c\u8fd9\u4e2a\u9636\u6bb5\u7684\u505c\u987f\u65f6\u95f4\u4f1a\u88ab\u521d\u59cb\u6807\u8bb0\u9636\u6bb5\u7a0d\u957f\uff0c\u4f46\u6bd4\u5e76\u53d1\u6807\u8bb0\u9636\u6bb5\u8981\u77ed\u3002<\/p>\n\n\n\n<p>\u7531\u4e8e\u6574\u4e2a\u8fc7\u7a0b\u4e2d\u8017\u65f6\u6700\u957f\u7684\u5e76\u53d1\u6807\u8bb0\u548c\u5e76\u53d1\u6e05\u9664\u8fc7\u7a0b\u4e2d\uff0c\u6536\u96c6\u5668\u7ebf\u7a0b\u90fd\u53ef\u4ee5\u4e0e\u7528\u6237\u7ebf\u7a0b\u4e00\u8d77\u5de5\u4f5c\uff0c\u6240\u4ee5\u6574\u4f53\u6765\u8bf4\uff0cCMS\u6536\u96c6\u5668\u7684\u5185\u5b58\u56de\u6536\u8fc7\u7a0b\u662f\u4e0e\u7528\u6237\u7ebf\u7a0b\u4e00\u8d77\u5e76\u53d1\u6267\u884c\u7684\u3002<\/p>\n\n\n\n<p><strong>\u4f18\u70b9<\/strong>\uff1a\u5e76\u53d1\u6536\u96c6\u3001\u4f4e\u505c\u987f<\/p>\n\n\n\n<p><strong>\u7f3a\u70b9<\/strong>\uff1a <\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u5bf9CPU\u975e\u5e38\u654f\u611f\uff1a\u5728\u5e76\u53d1\u9636\u6bb5\u867d\u7136\u4e0d\u4f1a\u5bfc\u81f4\u7528\u6237\u7ebf\u7a0b\u505c\u987f\uff0c\u4f46\u662f\u4f1a\u56e0\u4e3a\u5360\u7528\u4e86\u4e00\u90e8\u5206\u7ebf\u7a0b\u4f7f\u5e94\u7528\u7a0b\u5e8f\u53d8\u6162\uff1b<\/li><li>\u65e0\u6cd5\u5904\u7406\u6d6e\u52a8\u5783\u573e\uff1a\u5728\u6700\u540e\u4e00\u6b65\u5e76\u53d1\u6e05\u7406\u8fc7\u7a0b\u4e2d\uff0c\u7528\u6237\u7ebf\u7a0b\u6267\u884c\u4e5f\u4f1a\u4ea7\u751f\u5783\u573e\uff0c\u4f46\u662f\u8fd9\u90e8\u5206\u5783\u573e\u662f\u5728\u6807\u8bb0\u4e4b\u540e\uff0c\u6240\u4ee5\u53ea\u6709\u7b49\u5230\u4e0b\u4e00\u6b21gc\u7684\u65f6\u5019\u6e05\u7406\u6389\uff0c\u8fd9\u90e8\u5206\u5783\u573e\u53eb\u6d6e\u52a8\u5783\u573e\uff1b<\/li><li>CMS\u4f7f\u7528\u201c\u6807\u8bb0-\u6e05\u7406\u201d\u6cd5\u4f1a\u4ea7\u751f\u5927\u91cf\u7684\u7a7a\u95f4\u788e\u7247\uff0c\u5f53\u788e\u7247\u8fc7\u591a\uff0c\u5c06\u4f1a\u7ed9\u5927\u5bf9\u8c61\u7a7a\u95f4\u7684\u5206\u914d\u5e26\u6765\u5f88\u5927\u7684\u9ebb\u70e6\uff0c\u5f80\u5f80\u4f1a\u51fa\u73b0\u8001\u5e74\u4ee3\u8fd8\u6709\u5f88\u5927\u7684\u7a7a\u95f4\u4f46\u65e0\u6cd5\u627e\u5230\u8db3\u591f\u5927\u7684\u8fde\u7eed\u7a7a\u95f4\u6765\u5206\u914d\u5f53\u524d\u5bf9\u8c61\uff0c\u4e0d\u5f97\u4e0d\u63d0\u524d\u89e6\u53d1\u4e00\u6b21Full GC\uff0c\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898CMS\u63d0\u4f9b\u4e86\u4e00\u4e2a\u5f00\u5173\u53c2\u6570\uff0c\u7528\u4e8e\u5728CMS\u9876\u4e0d\u4f4f\uff0c\u8981\u8fdb\u884cFull GC\u65f6\u5f00\u542f\u5185\u5b58\u788e\u7247\u7684\u5408\u5e76\u6574\u7406\u8fc7\u7a0b\uff0c\u4f46\u662f\u5185\u5b58\u6574\u7406\u7684\u8fc7\u7a0b\u662f\u65e0\u6cd5\u5e76\u53d1\u7684\uff0c\u7a7a\u95f4\u788e\u7247\u6ca1\u6709\u4e86\u4f46\u662f\u505c\u987f\u65f6\u95f4\u53d8\u957f\u4e86\u3002<\/li><\/ul>\n\n\n\n<p>CMS\u51fa\u73b0FULL GC\u7684\u539f\u56e0\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u5e74\u8f7b\u5e26\u664b\u5347\u5230\u8001\u5e74\u5e26\u6ca1\u6709\u8db3\u591f\u7684\u8fde\u7eed\u7a7a\u95f4\uff0c\u5f88\u6709\u53ef\u80fd\u662f\u5185\u5b58\u788e\u7247\u5bfc\u81f4\u7684 <\/li><li> \u5728\u5e76\u53d1\u8fc7\u7a0b\u4e2dJVM\u89c9\u5f97\u5728\u5e76\u53d1\u8fc7\u7a0b\u7ed3\u675f\u4e4b\u524d\u5806\u5c31\u4f1a\u6ee1\uff0c\u9700\u8981\u63d0\u524d\u89e6\u53d1Full GC <\/li><\/ul>\n\n\n\n<p><strong>G1<\/strong>\uff0c\u662f\u4e00\u6b3e\u9762\u5411\u670d\u52a1\u7aef\u5e94\u7528\u7684\u5783\u573e\u6536\u96c6\u5668\uff0c\u4e5f\u5c31\u662f\u4e0d\u9700\u8981\u5176\u4ed6\u6536\u96c6\u5668\u534f\u52a9\u5c31\u80fd\u7ba1\u7406\u65b0\u751f\u4ee3\u548c\u8001\u5e74\u4ee3\u5185\u5b58\u3002\uff08JDK1.7\u53ca\u4ee5\u4e0a\u7248\u672c\uff09<\/p>\n\n\n\n<p>\u4e0e\u5176\u5b83\u6536\u96c6\u5668\u76f8\u6bd4\uff0cG1\u53d8\u5316\u8f83\u5927\u7684\u662f\u5b83\u5c06\u6574\u4e2aJava\u5806\u5212\u5206\u4e3a\u591a\u4e2a\u5927\u5c0f\u76f8\u7b49\u7684\u72ec\u7acb\u533a\u57df\uff08Region\uff09\uff0c\u867d\u7136\u8fd8\u4fdd\u7559\u4e86\u65b0\u751f\u4ee3\u548c\u6765\u5e74\u4ee3\u7684\u6982\u5ff5\uff0c\u4f46\u65b0\u751f\u4ee3\u548c\u8001\u5e74\u4ee3\u4e0d\u518d\u662f\u7269\u7406\u9694\u79bb\u7684\u4e86\u5b83\u4eec\u90fd\u662f\u4e00\u90e8\u5206Region\uff08\u4e0d\u9700\u8981\u8fde\u7eed\uff09\u7684\u96c6\u5408\u3002\u540c\u65f6\uff0c\u4e3a\u4e86\u907f\u514d\u5168\u5806\u626b\u63cf\uff0cG1\u4f7f\u7528\u4e86Remembered  Set\u6765\u7ba1\u7406\u76f8\u5173\u7684\u5bf9\u8c61\u5f15\u7528\u4fe1\u606f\u3002\u5f53\u8fdb\u884c\u5185\u5b58\u56de\u6536\u65f6\uff0c\u5728GC\u6839\u8282\u70b9\u7684\u679a\u4e3e\u8303\u56f4\u4e2d\u52a0\u5165Remembered Set\u5373\u53ef\u4fdd\u8bc1\u4e0d\u5bf9\u5168\u5806\u626b\u63cf\u4e5f\u4e0d\u4f1a\u6709\u9057\u6f0f\u4e86\u3002 <\/p>\n\n\n\n<p><strong>\u8fc7\u7a0b<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u521d\u59cb\u6807\u8bb0\uff08Initial Making\uff09<\/li><li>\u5e76\u53d1\u6807\u8bb0\uff08Concurrent Marking\uff09<\/li><li>\u6700\u7ec8\u6807\u8bb0\uff08Final Marking\uff09<\/li><li>\u7b5b\u9009\u56de\u6536\uff08Live Data Counting and Evacuation\uff09<\/li><\/ul>\n\n\n\n<p>\u770b\u4e0a\u53bb\u8ddfCMS\u6536\u96c6\u5668\u7684\u8fd0\u4f5c\u8fc7\u7a0b\u6709\u51e0\u5206\u76f8\u4f3c\uff0c\u4e0d\u8fc7\u786e\u5b9e\u4e5f\u8fd9\u6837\u3002\u521d\u59cb\u9636\u6bb5\u4ec5\u4ec5\u53ea\u662f\u6807\u8bb0\u4e00\u4e0bGC  Roots\u80fd\u76f4\u63a5\u5173\u8054\u5230\u7684\u5bf9\u8c61\uff0c\u5e76\u4e14\u4fee\u6539TAMS\uff08Next Top Mark  Start\uff09\u7684\u503c\uff0c\u8ba9\u4e0b\u4e00\u9636\u6bb5\u7528\u6237\u7a0b\u5e8f\u5e76\u53d1\u8fd0\u884c\u65f6\uff0c\u80fd\u5728\u6b63\u786e\u53ef\u4ee5\u7528\u7684Region\u4e2d\u521b\u5efa\u65b0\u5bf9\u8c61\uff0c\u8fd9\u4e2a\u9636\u6bb5\u9700\u8981\u505c\u987f\u7ebf\u7a0b\uff0c\u4f46\u8017\u65f6\u5f88\u77ed\u3002\u5e76\u53d1\u6807\u8bb0\u9636\u6bb5\u662f\u4eceGC  Roots\u5f00\u59cb\u5bf9\u5806\u4e2d\u5bf9\u8c61\u8fdb\u884c\u53ef\u8fbe\u6027\u5206\u6790\uff0c\u627e\u51fa\u5b58\u6d3b\u5bf9\u8c61\uff0c\u8fd9\u4e00\u9636\u6bb5\u8017\u65f6\u8f83\u957f\u4f46\u80fd\u4e0e\u7528\u6237\u7ebf\u7a0b\u5e76\u53d1\u8fd0\u884c\u3002\u800c\u6700\u7ec8\u6807\u8bb0\u9636\u6bb5\u9700\u8981\u5427Remembered Set  Logs\u7684\u6570\u636e\u5408\u5e76\u5230Remembered  Set\u4e2d\uff0c\u8fd9\u9636\u6bb5\u9700\u8981\u505c\u987f\u7ebf\u7a0b\uff0c\u4f46\u53ef\u5e76\u884c\u6267\u884c\u3002\u6700\u540e\u7b5b\u9009\u56de\u6536\u9636\u6bb5\u9996\u5148\u5bf9\u5404\u4e2aRegion\u7684\u56de\u6536\u4ef7\u503c\u548c\u6210\u672c\u8fdb\u884c\u6392\u5e8f\uff0c\u6839\u636e\u7528\u6237\u6240\u671f\u671b\u7684GC\u505c\u987f\u65f6\u95f4\u6765\u5236\u5b9a\u56de\u6536\u8ba1\u5212\uff0c\u8fd9\u4e00\u8fc7\u7a0b\u540c\u6837\u662f\u9700\u8981\u505c\u987f\u7ebf\u7a0b\u7684\uff0c\u4f46Sun\u516c\u53f8\u900f\u9732\u8fd9\u4e2a\u9636\u6bb5\u5176\u5b9e\u4e5f\u53ef\u4ee5\u505a\u5230\u5e76\u53d1\uff0c\u4f46\u8003\u8651\u5230\u505c\u987f\u7ebf\u7a0b\u5c06\u5927\u5e45\u5ea6\u63d0\u9ad8\u6536\u96c6\u6548\u7387\uff0c\u6240\u4ee5\u9009\u62e9\u505c\u987f\u3002<\/p>\n\n\n\n<p><strong>\u7279\u70b9<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u5e76\u884c\u4e0e\u5e76\u53d1\uff1aG1\u80fd\u5145\u5206\u5229\u7528CPU\u3001\u591a\u6838\u73af\u5883\u4e0b\u7684\u786c\u4ef6\u4f18\u52bf\uff0c\u4f7f\u7528\u591a\u4e2aCPU\uff08CPU\u6216\u8005CPU\u6838\u5fc3\uff09\u6765\u7f29\u77edstop-The-World\u505c\u987f\u65f6\u95f4\u3002\u90e8\u5206\u5176\u4ed6\u6536\u96c6\u5668\u539f\u672c\u9700\u8981\u505c\u987fJava\u7ebf\u7a0b\u6267\u884c\u7684GC\u52a8\u4f5c\uff0cG1\u6536\u96c6\u5668\u4ecd\u7136\u53ef\u4ee5\u901a\u8fc7\u5e76\u53d1\u7684\u65b9\u5f0f\u8ba9java\u7a0b\u5e8f\u7ee7\u7eed\u6267\u884c\u3002 <\/li><li>\u5206\u4ee3\u6536\u96c6\uff1a\u5206\u4ee3\u6982\u5ff5\u5728G1\u4e2d\u4f9d\u7136\u5f97\u4ee5\u4fdd\u7559\u3002\u867d\u7136G1\u53ef\u4ee5\u4e0d\u9700\u8981\u5176\u5b83\u6536\u96c6\u5668\u914d\u5408\u5c31\u80fd\u72ec\u7acb\u7ba1\u7406\u6574\u4e2aGC\u5806\uff0c\u4f46\u5b83\u80fd\u591f\u91c7\u7528\u4e0d\u540c\u7684\u65b9\u5f0f\u53bb\u5904\u7406\u65b0\u521b\u5efa\u7684\u5bf9\u8c61\u548c\u5df2\u7ecf\u5b58\u6d3b\u4e86\u4e00\u6bb5\u65f6\u95f4\u3001\u71ac\u8fc7\u591a\u6b21GC\u7684\u65e7\u5bf9\u8c61\u4ee5\u83b7\u53d6\u66f4\u597d\u7684\u6536\u96c6\u6548\u679c\u3002\u4e5f\u5c31\u662f\u8bf4G1\u53ef\u4ee5\u81ea\u5df1\u7ba1\u7406\u65b0\u751f\u4ee3\u548c\u8001\u5e74\u4ee3\u4e86\u3002<\/li><li>\u7a7a\u95f4\u6574\u5408\uff1a\u7531\u4e8eG1\u4f7f\u7528\u4e86\u72ec\u7acb\u533a\u57df\uff08Region\uff09\u6982\u5ff5\uff0cG1\u4ece\u6574\u4f53\u6765\u770b\u662f\u57fa\u4e8e\u201c<strong>\u6807\u8bb0\u6574\u7406<\/strong>\u201d\u7b97\u6cd5\u5b9e\u73b0\u6536\u96c6\uff0c\u4ece\u5c40\u90e8\uff08\u4e24\u4e2aRegion\uff09\u4e0a\u6765\u770b\u662f\u57fa\u4e8e\u201c<strong>\u590d\u5236<\/strong>\u201d\u7b97\u6cd5\u5b9e\u73b0\u7684\uff0c\u4f46\u65e0\u8bba\u5982\u4f55\uff0c\u8fd9\u4e24\u79cd\u7b97\u6cd5\u90fd\u610f\u5473\u7740G1\u8fd0\u4f5c\u671f\u95f4\u4e0d\u4f1a\u4ea7\u751f\u5185\u5b58\u7a7a\u95f4\u788e\u7247\u3002<\/li><li>\u53ef\u9884\u6d4b\u7684\u505c\u987f\uff1a\u8fd9\u662fG1\u76f8\u5bf9\u4e8eCMS\u7684\u53e6\u4e00\u5927\u4f18\u52bf\uff0c\u964d\u4f4e\u505c\u987f\u65f6\u95f4\u662fG1\u548cCMS\u5171\u540c\u7684\u5173\u6ce8\u70b9\uff0c\u4f46G1\u9664\u4e86\u8ffd\u6c42\u4f4e\u505c\u987f\u5916\uff0c\u8fd8\u80fd\u5efa\u7acb\u53ef\u9884\u6d4b\u7684\u505c\u987f\u65f6\u95f4\u6a21\u578b\uff0c\u80fd\u8ba9\u4f7f\u7528\u8fd9\u660e\u786e\u6307\u5b9a\u4e00\u4e2a\u957f\u5ea6\u4e3aM\u6beb\u79d2\u7684\u65f6\u95f4\u7247\u6bb5\u5185\uff0c\u6d88\u8017\u5728\u5783\u573e\u6536\u96c6\u4e0a\u7684\u65f6\u95f4\u4e0d\u5f97\u8d85\u8fc7N\u6beb\u79d2\u3002<\/li><\/ul>\n<p>\u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff1a<a href=\"http:\/\/weitaoc.com\">\u8ff7\u8def\u7684\u8001\u9f20<\/a> &raquo; <a href=\"http:\/\/weitaoc.com\/?p=573\">\u5783\u573e\u56de\u6536\u5668<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>\u4ec0\u4e48\u662f\u5783\u573e\u56de\u6536\u5668 Java\u5783\u573e\u56de\u6536\u5668\u662fJava\u865a\u62df\u673a(JVM)\u7684\u4e09\u4e2a\u91cd\u8981\u6a21\u5757(\u53e6\u5916\u4e24\u4e2a\u662f\u89e3\u91ca\u5668\u548c\u591a\u7ebf\u7a0b\u673a\u5236)\u4e4b\u4e00\uff0c\u4e3a\u5e94\u7528\u7a0b\u5e8f\u63d0\u4f9b\u5185\u5b58\u7684\u81ea\u52a8\u5206\u914d(Memory Allocation)\u3001\u81ea\u52a8\u56de\u6536(Garbage Collect)\u529f\u80fd \u5185\u5b58\u7684\u5206\u914d\u548c\u56de\u6536\u90fd\u53d1 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[57],"tags":[59,63],"class_list":["post-573","post","type-post","status-publish","format-standard","hentry","category-java","tag-java","tag-jvm"],"views":8152,"_links":{"self":[{"href":"http:\/\/weitaoc.com\/index.php?rest_route=\/wp\/v2\/posts\/573","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/weitaoc.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/weitaoc.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/weitaoc.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/weitaoc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=573"}],"version-history":[{"count":2,"href":"http:\/\/weitaoc.com\/index.php?rest_route=\/wp\/v2\/posts\/573\/revisions"}],"predecessor-version":[{"id":576,"href":"http:\/\/weitaoc.com\/index.php?rest_route=\/wp\/v2\/posts\/573\/revisions\/576"}],"wp:attachment":[{"href":"http:\/\/weitaoc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=573"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/weitaoc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=573"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/weitaoc.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=573"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}