{"id":58798,"date":"2025-08-16T15:59:46","date_gmt":"2025-08-16T07:59:46","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/58798.html"},"modified":"2025-08-16T15:59:46","modified_gmt":"2025-08-16T07:59:46","slug":"jvm-%e5%86%85%e5%ad%98%e7%ae%a1%e7%90%86%e4%b8%8e%e5%9e%83%e5%9c%be%e5%9b%9e%e6%94%b6%e6%9c%ba%e5%88%b6%ef%bc%9a%e6%b7%b1%e5%85%a5%e7%90%86%e8%a7%a3-java-%e7%a8%8b%e5%ba%8f%e7%9a%84-%e5%b9%95","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/58798.html","title":{"rendered":"JVM \u5185\u5b58\u7ba1\u7406\u4e0e\u5783\u573e\u56de\u6536\u673a\u5236\uff1a\u6df1\u5165\u7406\u89e3 Java \u7a0b\u5e8f\u7684 \u201c\u5e55\u540e\u7ba1\u5bb6\u201d"},"content":{"rendered":"<p id=\"main-toc\">\u76ee\u5f55<\/p>\n<p id=\"%E4%B8%80%E3%80%81JVM%20%E5%86%85%E5%AD%98%E7%BB%93%E6%9E%84%EF%BC%9A%E7%A8%8B%E5%BA%8F%E8%BF%90%E8%A1%8C%E7%9A%84%20%E2%80%9C%E7%A9%BA%E9%97%B4%E5%B8%83%E5%B1%80%E2%80%9D%E2%80%8B-toc\" style=\"margin-left:0px\">\u4e00\u3001JVM \u5185\u5b58\u7ed3\u6784&#xff1a;\u7a0b\u5e8f\u8fd0\u884c\u7684 \u201c\u7a7a\u95f4\u5e03\u5c40\u201d\u200b<\/p>\n<p id=\"1.%20%E7%A8%8B%E5%BA%8F%E8%AE%A1%E6%95%B0%E5%99%A8%EF%BC%88Program%20Counter%20Register%EF%BC%89%E2%80%8B-toc\" style=\"margin-left:40px\">1. \u7a0b\u5e8f\u8ba1\u6570\u5668&#xff08;Program Counter Register&#xff09;\u200b<\/p>\n<p id=\"2.%20Java%20%E8%99%9A%E6%8B%9F%E6%9C%BA%E6%A0%88%EF%BC%88Java%20Virtual%20Machine%20Stack%EF%BC%89%E2%80%8B-toc\" style=\"margin-left:40px\">2. Java \u865a\u62df\u673a\u6808&#xff08;Java Virtual Machine Stack&#xff09;\u200b<\/p>\n<p id=\"3.%20%E6%9C%AC%E5%9C%B0%E6%96%B9%E6%B3%95%E6%A0%88%EF%BC%88Native%20Method%20Stack%EF%BC%89%E2%80%8B-toc\" style=\"margin-left:40px\">3. \u672c\u5730\u65b9\u6cd5\u6808&#xff08;Native Method Stack&#xff09;\u200b<\/p>\n<p id=\"4.%20Java%20%E5%A0%86%EF%BC%88Java%20Heap%EF%BC%89%E2%80%8B-toc\" style=\"margin-left:40px\">4. Java \u5806&#xff08;Java Heap&#xff09;\u200b<\/p>\n<p id=\"5.%20%E6%96%B9%E6%B3%95%E5%8C%BA%EF%BC%88Method%20Area%EF%BC%89%E2%80%8B-toc\" style=\"margin-left:40px\">5. \u65b9\u6cd5\u533a&#xff08;Method Area&#xff09;\u200b<\/p>\n<p id=\"%E4%BA%8C%E3%80%81%E5%9E%83%E5%9C%BE%E5%9B%9E%E6%94%B6%E7%AE%97%E6%B3%95%EF%BC%9A%E5%A6%82%E4%BD%95%20%E2%80%9C%E8%AF%86%E5%88%AB%E2%80%9D%20%E4%B8%8E%20%E2%80%9C%E6%B8%85%E7%90%86%E2%80%9D%20%E5%9E%83%E5%9C%BE%E2%80%8B-toc\" style=\"margin-left:0px\">\u4e8c\u3001\u5783\u573e\u56de\u6536\u7b97\u6cd5&#xff1a;\u5982\u4f55 \u201c\u8bc6\u522b\u201d \u4e0e \u201c\u6e05\u7406\u201d \u5783\u573e\u200b<\/p>\n<p id=\"1.%20%E5%9E%83%E5%9C%BE%E8%AF%86%E5%88%AB%EF%BC%9A%E5%A6%82%E4%BD%95%E5%88%A4%E6%96%AD%E5%AF%B9%E8%B1%A1%E5%B7%B2%20%E2%80%9C%E6%AD%BB%E4%BA%A1%E2%80%9D%E2%80%8B-toc\" style=\"margin-left:40px\">1. \u5783\u573e\u8bc6\u522b&#xff1a;\u5982\u4f55\u5224\u65ad\u5bf9\u8c61\u5df2 \u201c\u6b7b\u4ea1\u201d\u200b<\/p>\n<p id=\"2.%20%E5%BC%95%E7%94%A8%E7%B1%BB%E5%9E%8B%EF%BC%9A%E5%AF%B9%E8%B1%A1%20%E2%80%9C%E5%AD%98%E6%B4%BB%E2%80%9D%20%E7%9A%84%E4%B8%8D%E5%90%8C%E7%8A%B6%E6%80%81%E2%80%8B-toc\" style=\"margin-left:40px\">2. \u5f15\u7528\u7c7b\u578b&#xff1a;\u5bf9\u8c61 \u201c\u5b58\u6d3b\u201d \u7684\u4e0d\u540c\u72b6\u6001\u200b<\/p>\n<p id=\"3.%20%E5%9E%83%E5%9C%BE%E6%B8%85%E7%90%86%E7%AE%97%E6%B3%95%EF%BC%9A%E5%A6%82%E4%BD%95%E9%87%8A%E6%94%BE%E5%86%85%E5%AD%98%E2%80%8B-toc\" style=\"margin-left:40px\">3. \u5783\u573e\u6e05\u7406\u7b97\u6cd5&#xff1a;\u5982\u4f55\u91ca\u653e\u5185\u5b58\u200b<\/p>\n<p id=\"%E4%B8%89%E3%80%81%E5%9E%83%E5%9C%BE%E5%9B%9E%E6%94%B6%E5%99%A8%EF%BC%9A%E7%AE%97%E6%B3%95%E7%9A%84%20%E2%80%9C%E5%85%B7%E4%BD%93%E5%AE%9E%E7%8E%B0%E8%80%85%E2%80%9D%E2%80%8B-toc\" style=\"margin-left:0px\">\u4e09\u3001\u5783\u573e\u56de\u6536\u5668&#xff1a;\u7b97\u6cd5\u7684 \u201c\u5177\u4f53\u5b9e\u73b0\u8005\u201d\u200b<\/p>\n<p id=\"1.%20Serial%20%E6%94%B6%E9%9B%86%E5%99%A8%E2%80%8B-toc\" style=\"margin-left:40px\">1. Serial \u6536\u96c6\u5668\u200b<\/p>\n<p id=\"2.%20ParNew%20%E6%94%B6%E9%9B%86%E5%99%A8%E2%80%8B-toc\" style=\"margin-left:40px\">2. ParNew \u6536\u96c6\u5668\u200b<\/p>\n<p id=\"3.%20Parallel%20Scavenge%20%E6%94%B6%E9%9B%86%E5%99%A8%E2%80%8B-toc\" style=\"margin-left:40px\">3. Parallel Scavenge \u6536\u96c6\u5668\u200b<\/p>\n<p id=\"4.%20Serial%20Old%20%E6%94%B6%E9%9B%86%E5%99%A8%E2%80%8B-toc\" style=\"margin-left:40px\">4. Serial Old \u6536\u96c6\u5668\u200b<\/p>\n<p id=\"5.%20Parallel%20Old%20%E6%94%B6%E9%9B%86%E5%99%A8%E2%80%8B-toc\" style=\"margin-left:40px\">5. Parallel Old \u6536\u96c6\u5668\u200b<\/p>\n<p id=\"6.%20CMS%20%E6%94%B6%E9%9B%86%E5%99%A8%E2%80%8B-toc\" style=\"margin-left:40px\">6. CMS \u6536\u96c6\u5668\u200b<\/p>\n<p id=\"7.%20G1%20%E6%94%B6%E9%9B%86%E5%99%A8%E2%80%8B-toc\" style=\"margin-left:40px\">7. G1 \u6536\u96c6\u5668\u200b<\/p>\n<p id=\"%E5%9B%9B%E3%80%81%E6%80%BB%E7%BB%93%EF%BC%9A%E4%BC%98%E5%8C%96%20Java%20%E7%A8%8B%E5%BA%8F%E7%9A%84%E5%86%85%E5%AD%98%E7%AE%A1%E7%90%86%E2%80%8B-toc\" style=\"margin-left:0px\">\u56db\u3001\u603b\u7ed3&#xff1a;\u4f18\u5316 Java \u7a0b\u5e8f\u7684\u5185\u5b58\u7ba1\u7406\u200b<\/p>\n<hr id=\"hr-toc\" \/>\n<p>\u5728 Java \u5f00\u53d1\u4e2d&#xff0c;\u6211\u4eec\u5e38\u5e38\u4e13\u6ce8\u4e8e\u4e1a\u52a1\u903b\u8f91\u7684\u5b9e\u73b0&#xff0c;\u5374\u5f88\u5c11\u76f4\u9762\u7a0b\u5e8f\u8fd0\u884c\u65f6\u7684 \u201c\u5e55\u540e\u7ba1\u5bb6\u201d\u2014\u2014JVM&#xff08;Java \u865a\u62df\u673a&#xff09;\u3002\u5b83\u9ed8\u9ed8\u627f\u62c5\u7740\u5185\u5b58\u5206\u914d\u3001\u56de\u6536\u548c\u8d44\u6e90\u8c03\u5ea6\u7684\u91cd\u4efb&#xff0c;\u76f4\u63a5\u5f71\u54cd\u7740\u7a0b\u5e8f\u7684\u6027\u80fd\u4e0e\u7a33\u5b9a\u6027\u3002\u672c\u6587\u5c06\u5e26\u4f60\u6df1\u5165\u5256\u6790 JVM \u7684\u5185\u5b58\u7ed3\u6784\u3001\u5783\u573e\u56de\u6536\u7b97\u6cd5\u53ca\u5783\u573e\u56de\u6536\u5668\u7684\u5de5\u4f5c\u539f\u7406&#xff0c;\u5e2e\u4f60\u63ed\u5f00 Java \u5185\u5b58\u7ba1\u7406\u7684\u795e\u79d8\u9762\u7eb1\u3002<\/p>\n<h2 id=\"%E4%B8%80%E3%80%81JVM%20%E5%86%85%E5%AD%98%E7%BB%93%E6%9E%84%EF%BC%9A%E7%A8%8B%E5%BA%8F%E8%BF%90%E8%A1%8C%E7%9A%84%20%E2%80%9C%E7%A9%BA%E9%97%B4%E5%B8%83%E5%B1%80%E2%80%9D%E2%80%8B\">\u4e00\u3001JVM \u5185\u5b58\u7ed3\u6784&#xff1a;\u7a0b\u5e8f\u8fd0\u884c\u7684 \u201c\u7a7a\u95f4\u5e03\u5c40\u201d\u200b<\/h2>\n<p>JVM \u7684\u5185\u5b58\u7ed3\u6784\u5c31\u50cf\u4e00\u4e2a\u7cbe\u5bc6\u7684 \u201c\u529e\u516c\u5927\u697c\u201d&#xff0c;\u4e0d\u540c\u533a\u57df\u5404\u53f8\u5176\u804c&#xff0c;\u5171\u540c\u652f\u6491\u7740 Java \u7a0b\u5e8f\u7684\u8fd0\u884c\u3002\u6309\u7167\u300aJava \u865a\u62df\u673a\u89c4\u8303\u300b&#xff0c;JVM \u5185\u5b58\u4e3b\u8981\u5206\u4e3a\u4ee5\u4e0b\u51e0\u4e2a\u6838\u5fc3\u533a\u57df&#xff1a;\u200b<\/p>\n<h3 id=\"1.%20%E7%A8%8B%E5%BA%8F%E8%AE%A1%E6%95%B0%E5%99%A8%EF%BC%88Program%20Counter%20Register%EF%BC%89%E2%80%8B\">1. \u7a0b\u5e8f\u8ba1\u6570\u5668&#xff08;Program Counter Register&#xff09;\u200b<\/h3>\n<p>\u7a0b\u5e8f\u8ba1\u6570\u5668\u662f\u4e00\u5757\u6781\u5c0f\u7684\u5185\u5b58\u7a7a\u95f4&#xff0c;\u5b83\u53ef\u4ee5\u770b\u4f5c\u662f\u5f53\u524d\u7ebf\u7a0b\u6240\u6267\u884c\u7684\u5b57\u8282\u7801\u7684\u884c\u53f7\u6307\u793a\u5668\u3002\u5728 Java \u591a\u7ebf\u7a0b\u73af\u5883\u4e2d&#xff0c;\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u6709\u72ec\u7acb\u7684\u7a0b\u5e8f\u8ba1\u6570\u5668&#xff0c;\u7528\u4e8e\u8bb0\u5f55\u7ebf\u7a0b\u5207\u6362\u65f6\u7684\u6267\u884c\u4f4d\u7f6e&#xff0c;\u786e\u4fdd\u7ebf\u7a0b\u6062\u590d\u8fd0\u884c\u65f6\u80fd\u56de\u5230\u6b63\u786e\u7684\u6267\u884c\u70b9\u3002\u6b64\u533a\u57df\u662f JVM \u4e2d\u552f\u4e00\u4e0d\u4f1a\u53d1\u751f OutOfMemoryError \u7684\u533a\u57df\u3002\u200b<\/p>\n<h3 id=\"2.%20Java%20%E8%99%9A%E6%8B%9F%E6%9C%BA%E6%A0%88%EF%BC%88Java%20Virtual%20Machine%20Stack%EF%BC%89%E2%80%8B\">2. Java \u865a\u62df\u673a\u6808&#xff08;Java Virtual Machine Stack&#xff09;\u200b<\/h3>\n<p>Java \u865a\u62df\u673a\u6808\u4e0e\u7ebf\u7a0b\u751f\u547d\u5468\u671f\u7ed1\u5b9a&#xff0c;\u6bcf\u4e2a\u7ebf\u7a0b\u521b\u5efa\u65f6\u90fd\u4f1a\u5206\u914d\u4e00\u4e2a\u865a\u62df\u673a\u6808\u3002\u6808\u7531\u4e00\u4e2a\u4e2a\u6808\u5e27\u7ec4\u6210&#xff0c;\u6bcf\u4e2a\u6808\u5e27\u5bf9\u5e94\u4e00\u6b21\u65b9\u6cd5\u8c03\u7528&#xff0c;\u5305\u542b\u5c40\u90e8\u53d8\u91cf\u8868\u3001\u64cd\u4f5c\u6570\u6808\u3001\u52a8\u6001\u94fe\u63a5\u3001\u65b9\u6cd5\u51fa\u53e3\u7b49\u4fe1\u606f\u3002\u5c40\u90e8\u53d8\u91cf\u8868\u5b58\u50a8\u4e86\u7f16\u8bd1\u671f\u53ef\u77e5\u7684\u5404\u79cd\u57fa\u672c\u6570\u636e\u7c7b\u578b&#xff08;\u5982 int\u3001boolean&#xff09;\u3001\u5bf9\u8c61\u5f15\u7528&#xff08;reference \u7c7b\u578b&#xff09;\u548c returnAddress \u7c7b\u578b\u3002\u200b<\/p>\n<p>\u5f53\u7ebf\u7a0b\u8bf7\u6c42\u7684\u6808\u6df1\u5ea6\u8d85\u8fc7\u865a\u62df\u673a\u5141\u8bb8\u7684\u6df1\u5ea6\u65f6&#xff0c;\u4f1a\u629b\u51faStackOverflowError&#xff1b;\u82e5\u865a\u62df\u673a\u6808\u53ef\u4ee5\u52a8\u6001\u6269\u5c55&#xff08;\u5927\u90e8\u5206\u5b9e\u73b0\u90fd\u652f\u6301&#xff09;&#xff0c;\u800c\u6269\u5c55\u65f6\u65e0\u6cd5\u7533\u8bf7\u5230\u8db3\u591f\u5185\u5b58&#xff0c;\u5219\u4f1a\u629b\u51faOutOfMemoryError\u3002\u200b<\/p>\n<h3 id=\"3.%20%E6%9C%AC%E5%9C%B0%E6%96%B9%E6%B3%95%E6%A0%88%EF%BC%88Native%20Method%20Stack%EF%BC%89%E2%80%8B\">3. \u672c\u5730\u65b9\u6cd5\u6808&#xff08;Native Method Stack&#xff09;\u200b<\/h3>\n<p>\u672c\u5730\u65b9\u6cd5\u6808\u4e0e\u865a\u62df\u673a\u6808\u529f\u80fd\u7c7b\u4f3c&#xff0c;\u533a\u522b\u5728\u4e8e\u865a\u62df\u673a\u6808\u4e3a Java \u65b9\u6cd5\u670d\u52a1&#xff0c;\u800c\u672c\u5730\u65b9\u6cd5\u6808\u4e3a\u865a\u62df\u673a\u4f7f\u7528\u7684\u672c\u5730&#xff08;Native&#xff09;\u65b9\u6cd5\u670d\u52a1\u3002\u672c\u5730\u65b9\u6cd5\u901a\u5e38\u7531 C\/C&#043;&#043; \u7f16\u5199&#xff0c;\u5982 Object \u7c7b\u7684 clone ()\u3001Thread \u7c7b\u7684 start0 () \u7b49\u3002\u5176\u5f02\u5e38\u673a\u5236\u4e0e\u865a\u62df\u673a\u6808\u4e00\u81f4&#xff0c;\u4e5f\u4f1a\u629b\u51fa StackOverflowError \u548c OutOfMemoryError\u3002\u200b<\/p>\n<h3 id=\"4.%20Java%20%E5%A0%86%EF%BC%88Java%20Heap%EF%BC%89%E2%80%8B\">4. Java \u5806&#xff08;Java Heap&#xff09;\u200b<\/h3>\n<p>Java \u5806\u662f JVM \u7ba1\u7406\u7684\u5185\u5b58\u4e2d\u6700\u5927\u7684\u4e00\u5757&#xff0c;\u88ab\u6240\u6709\u7ebf\u7a0b\u5171\u4eab&#xff0c;\u5728\u865a\u62df\u673a\u542f\u52a8\u65f6\u521b\u5efa\u3002\u6b64\u533a\u57df\u7684\u552f\u4e00\u76ee\u7684\u662f\u5b58\u653e\u5bf9\u8c61\u5b9e\u4f8b&#xff0c;\u51e0\u4e4e\u6240\u6709\u7684\u5bf9\u8c61\u5b9e\u4f8b\u90fd\u5728\u8fd9\u91cc\u5206\u914d\u5185\u5b58&#xff08;\u968f\u7740 JIT \u7f16\u8bd1\u5668\u7684\u53d1\u5c55\u548c\u9003\u9038\u5206\u6790\u6280\u672f\u7684\u6210\u719f&#xff0c;\u6808\u4e0a\u5206\u914d\u3001\u6807\u91cf\u66ff\u6362\u7b49\u4f18\u5316\u4f7f\u8fd9\u4e00\u8bf4\u6cd5\u6709\u6240\u52a8\u6447&#xff0c;\u4f46\u5806\u4ecd\u662f\u5bf9\u8c61\u5206\u914d\u7684\u4e3b\u8981\u533a\u57df&#xff09;\u3002\u200b<\/p>\n<p>Java \u5806\u662f\u5783\u573e\u6536\u96c6\u5668\u7ba1\u7406\u7684\u4e3b\u8981\u533a\u57df&#xff0c;\u56e0\u6b64\u4e5f\u88ab\u79f0\u4e3a \u201cGC \u5806\u201d\u3002\u4ece\u5185\u5b58\u56de\u6536\u89d2\u5ea6\u770b&#xff0c;\u5806\u53ef\u5206\u4e3a\u65b0\u751f\u4ee3&#xff08;Eden \u533a\u3001From Survivor \u533a\u3001To Survivor \u533a&#xff09;\u548c\u8001\u5e74\u4ee3&#xff1b;\u4ece\u5185\u5b58\u5206\u914d\u89d2\u5ea6\u770b&#xff0c;\u5806\u4e2d\u53ef\u80fd\u5b58\u5728\u591a\u4e2a\u7ebf\u7a0b\u79c1\u6709\u7684\u5206\u914d\u7f13\u51b2\u533a&#xff08;TLAB&#xff09;\u3002\u5806\u65e0\u6cd5\u6ee1\u8db3\u5185\u5b58\u5206\u914d\u9700\u6c42\u65f6&#xff0c;\u4f1a\u629b\u51fa OutOfMemoryError\u3002\u200b<\/p>\n<h3 id=\"5.%20%E6%96%B9%E6%B3%95%E5%8C%BA%EF%BC%88Method%20Area%EF%BC%89%E2%80%8B\">5. \u65b9\u6cd5\u533a&#xff08;Method Area&#xff09;\u200b<\/h3>\n<p>\u65b9\u6cd5\u533a\u4e0e Java \u5806\u4e00\u6837&#xff0c;\u662f\u6240\u6709\u7ebf\u7a0b\u5171\u4eab\u7684\u5185\u5b58\u533a\u57df&#xff0c;\u7528\u4e8e\u5b58\u50a8\u5df2\u88ab\u865a\u62df\u673a\u52a0\u8f7d\u7684\u7c7b\u4fe1\u606f\u3001\u5e38\u91cf\u3001\u9759\u6001\u53d8\u91cf\u3001\u5373\u65f6\u7f16\u8bd1\u5668\u7f16\u8bd1\u540e\u7684\u4ee3\u7801\u7b49\u6570\u636e\u3002\u5728 JDK8 \u4e4b\u524d&#xff0c;\u65b9\u6cd5\u533a\u7684\u5b9e\u73b0\u88ab\u79f0\u4e3a \u201c\u6c38\u4e45\u4ee3\u201d&#xff0c;\u800c JDK8 \u53ca\u4ee5\u540e&#xff0c;\u6c38\u4e45\u4ee3\u88ab\u5143\u7a7a\u95f4&#xff08;Metaspace&#xff09;\u53d6\u4ee3&#xff0c;\u5143\u7a7a\u95f4\u5e76\u4e0d\u5728\u865a\u62df\u673a\u5185\u5b58\u4e2d&#xff0c;\u800c\u662f\u4f7f\u7528\u672c\u5730\u5185\u5b58&#xff0c;\u8fd9\u4f7f\u5f97\u65b9\u6cd5\u533a\u7684\u5185\u5b58\u7ba1\u7406\u66f4\u52a0\u7075\u6d3b&#xff0c;\u51cf\u5c11\u4e86 OOM \u7684\u53ef\u80fd\u6027\u3002\u200b<\/p>\n<p>\u65b9\u6cd5\u533a\u7684\u5185\u5b58\u56de\u6536\u76ee\u6807\u4e3b\u8981\u662f\u9488\u5bf9\u5e38\u91cf\u6c60\u7684\u56de\u6536\u548c\u5bf9\u7c7b\u578b\u7684\u5378\u8f7d&#xff0c;\u5f53\u65b9\u6cd5\u533a\u65e0\u6cd5\u6ee1\u8db3\u5185\u5b58\u5206\u914d\u9700\u6c42\u65f6&#xff0c;\u4f1a\u629b\u51fa OutOfMemoryError\u3002\u200b<\/p>\n<h2 id=\"%E4%BA%8C%E3%80%81%E5%9E%83%E5%9C%BE%E5%9B%9E%E6%94%B6%E7%AE%97%E6%B3%95%EF%BC%9A%E5%A6%82%E4%BD%95%20%E2%80%9C%E8%AF%86%E5%88%AB%E2%80%9D%20%E4%B8%8E%20%E2%80%9C%E6%B8%85%E7%90%86%E2%80%9D%20%E5%9E%83%E5%9C%BE%E2%80%8B\">\u4e8c\u3001\u5783\u573e\u56de\u6536\u7b97\u6cd5&#xff1a;\u5982\u4f55 \u201c\u8bc6\u522b\u201d \u4e0e \u201c\u6e05\u7406\u201d \u5783\u573e\u200b<\/h2>\n<p>\u5783\u573e\u56de\u6536&#xff08;GC&#xff09;\u7684\u6838\u5fc3\u4efb\u52a1\u662f \u201c\u8bc6\u522b\u201d \u51fa\u4e0d\u518d\u88ab\u4f7f\u7528\u7684\u5bf9\u8c61&#xff08;\u5783\u573e&#xff09;&#xff0c;\u5e76 \u201c\u6e05\u7406\u201d \u8fd9\u4e9b\u5bf9\u8c61\u5360\u7528\u7684\u5185\u5b58&#xff0c;\u4f7f\u5185\u5b58\u53ef\u88ab\u91cd\u65b0\u5229\u7528\u3002\u200b<\/p>\n<h3 id=\"1.%20%E5%9E%83%E5%9C%BE%E8%AF%86%E5%88%AB%EF%BC%9A%E5%A6%82%E4%BD%95%E5%88%A4%E6%96%AD%E5%AF%B9%E8%B1%A1%E5%B7%B2%20%E2%80%9C%E6%AD%BB%E4%BA%A1%E2%80%9D%E2%80%8B\">1. \u5783\u573e\u8bc6\u522b&#xff1a;\u5982\u4f55\u5224\u65ad\u5bf9\u8c61\u5df2 \u201c\u6b7b\u4ea1\u201d\u200b<\/h3>\n<ul>\n<li>\u5f15\u7528\u8ba1\u6570\u6cd5&#xff1a;\u7ed9\u6bcf\u4e2a\u5bf9\u8c61\u8bbe\u7f6e\u4e00\u4e2a\u5f15\u7528\u8ba1\u6570\u5668&#xff0c;\u6bcf\u5f53\u6709\u4e00\u4e2a\u5730\u65b9\u5f15\u7528\u5b83\u65f6&#xff0c;\u8ba1\u6570\u5668\u503c\u52a0 1&#xff1b;\u5f53\u5f15\u7528\u5931\u6548\u65f6&#xff0c;\u8ba1\u6570\u5668\u503c\u51cf 1&#xff1b;\u4efb\u4f55\u65f6\u523b\u8ba1\u6570\u5668\u4e3a 0 \u7684\u5bf9\u8c61\u5c31\u662f\u4e0d\u53ef\u80fd\u518d\u88ab\u4f7f\u7528\u7684\u3002\u4f46\u8fd9\u79cd\u65b9\u6cd5\u96be\u4ee5\u89e3\u51b3\u5bf9\u8c61\u4e4b\u95f4\u76f8\u4e92\u5faa\u73af\u5f15\u7528\u7684\u95ee\u9898&#xff08;\u5982\u5bf9\u8c61 A \u5f15\u7528\u5bf9\u8c61 B&#xff0c;\u5bf9\u8c61 B \u5f15\u7528\u5bf9\u8c61 A&#xff0c;\u6b64\u65f6\u4e24\u8005\u8ba1\u6570\u5668\u90fd\u4e3a 1&#xff0c;\u4f46\u5b9e\u9645\u4e0a\u5df2\u65e0\u5176\u4ed6\u5f15\u7528&#xff09;&#xff0c;\u56e0\u6b64 Java \u865a\u62df\u673a\u5e76\u672a\u91c7\u7528\u8fd9\u79cd\u65b9\u6cd5\u3002\u200b<\/li>\n<\/ul>\n<ul>\n<li>\u53ef\u8fbe\u6027\u5206\u6790\u7b97\u6cd5&#xff1a;\u901a\u8fc7\u4e00\u7cfb\u5217\u79f0\u4e3a \u201cGC Roots\u201d \u7684\u6839\u5bf9\u8c61\u4f5c\u4e3a\u8d77\u59cb\u70b9&#xff0c;\u4ece\u8fd9\u4e9b\u8282\u70b9\u5f00\u59cb\u5411\u4e0b\u641c\u7d22&#xff0c;\u641c\u7d22\u8d70\u8fc7\u7684\u8def\u5f84\u79f0\u4e3a\u5f15\u7528\u94fe&#xff0c;\u5f53\u4e00\u4e2a\u5bf9\u8c61\u5230 GC Roots \u6ca1\u6709\u4efb\u4f55\u5f15\u7528\u94fe\u76f8\u8fde&#xff08;\u5373\u4ece GC Roots \u5230\u8be5\u5bf9\u8c61\u4e0d\u53ef\u8fbe&#xff09;\u65f6&#xff0c;\u5219\u8bc1\u660e\u6b64\u5bf9\u8c61\u662f\u4e0d\u53ef\u7528\u7684\u3002\u5728 Java \u4e2d&#xff0c;GC Roots \u5305\u62ec&#xff1a;\u865a\u62df\u673a\u6808\u4e2d\u5f15\u7528\u7684\u5bf9\u8c61\u3001\u65b9\u6cd5\u533a\u4e2d\u7c7b\u9759\u6001\u5c5e\u6027\u5f15\u7528\u7684\u5bf9\u8c61\u3001\u65b9\u6cd5\u533a\u4e2d\u5e38\u91cf\u5f15\u7528\u7684\u5bf9\u8c61\u3001\u672c\u5730\u65b9\u6cd5\u6808\u4e2d JNI&#xff08;\u5373\u4e00\u822c\u8bf4\u7684 Native \u65b9\u6cd5&#xff09;\u5f15\u7528\u7684\u5bf9\u8c61\u7b49\u3002\u200b<\/li>\n<\/ul>\n<h3 id=\"2.%20%E5%BC%95%E7%94%A8%E7%B1%BB%E5%9E%8B%EF%BC%9A%E5%AF%B9%E8%B1%A1%20%E2%80%9C%E5%AD%98%E6%B4%BB%E2%80%9D%20%E7%9A%84%E4%B8%8D%E5%90%8C%E7%8A%B6%E6%80%81%E2%80%8B\">2. \u5f15\u7528\u7c7b\u578b&#xff1a;\u5bf9\u8c61 \u201c\u5b58\u6d3b\u201d \u7684\u4e0d\u540c\u72b6\u6001\u200b<\/h3>\n<p>Java \u4e2d\u7684\u5f15\u7528\u5e76\u975e\u53ea\u6709 \u201c\u5f15\u7528\u201d \u548c \u201c\u672a\u5f15\u7528\u201d \u4e24\u79cd\u72b6\u6001&#xff0c;\u800c\u662f\u5206\u4e3a\u5f3a\u5f15\u7528\u3001\u8f6f\u5f15\u7528\u3001\u5f31\u5f15\u7528\u548c\u865a\u5f15\u7528&#xff0c;\u4e0d\u540c\u5f15\u7528\u7c7b\u578b\u7684\u5bf9\u8c61\u5728\u5783\u573e\u56de\u6536\u65f6\u7684\u5904\u7406\u65b9\u5f0f\u4e0d\u540c&#xff1a;\u200b<\/p>\n<ul>\n<li>\u5f3a\u5f15\u7528&#xff1a;\u6700\u5e38\u89c1\u7684\u5f15\u7528\u7c7b\u578b&#xff0c;\u5982Object obj &#061; new Object()&#xff0c;\u53ea\u8981\u5f3a\u5f15\u7528\u5b58\u5728&#xff0c;\u5783\u573e\u56de\u6536\u5668\u5c31\u4e0d\u4f1a\u56de\u6536\u88ab\u5f15\u7528\u7684\u5bf9\u8c61\u3002\u200b<\/li>\n<\/ul>\n<ul>\n<li>\u8f6f\u5f15\u7528&#xff1a;\u7528\u6765\u63cf\u8ff0\u4e00\u4e9b\u8fd8\u6709\u7528\u4f46\u975e\u5fc5\u9700\u7684\u5bf9\u8c61\u3002\u5728\u7cfb\u7edf\u5c06\u8981\u53d1\u751f\u5185\u5b58\u6ea2\u51fa\u5f02\u5e38\u4e4b\u524d&#xff0c;\u4f1a\u628a\u8fd9\u4e9b\u5bf9\u8c61\u5217\u8fdb\u56de\u6536\u8303\u56f4\u8fdb\u884c\u7b2c\u4e8c\u6b21\u56de\u6536\u3002\u82e5\u8fd9\u6b21\u56de\u6536\u8fd8\u6ca1\u6709\u8db3\u591f\u7684\u5185\u5b58&#xff0c;\u624d\u4f1a\u629b\u51fa\u5185\u5b58\u6ea2\u51fa\u5f02\u5e38\u3002\u200b<\/li>\n<\/ul>\n<ul>\n<li>\u5f31\u5f15\u7528&#xff1a;\u7528\u6765\u63cf\u8ff0\u975e\u5fc5\u9700\u5bf9\u8c61&#xff0c;\u4f46\u5f3a\u5ea6\u6bd4\u8f6f\u5f15\u7528\u66f4\u5f31\u3002\u88ab\u5f31\u5f15\u7528\u5173\u8054\u7684\u5bf9\u8c61\u53ea\u80fd\u751f\u5b58\u5230\u4e0b\u4e00\u6b21\u5783\u573e\u56de\u6536\u53d1\u751f\u4e4b\u524d&#xff0c;\u5f53\u5783\u573e\u56de\u6536\u5668\u5de5\u4f5c\u65f6&#xff0c;\u65e0\u8bba\u5f53\u524d\u5185\u5b58\u662f\u5426\u8db3\u591f&#xff0c;\u90fd\u4f1a\u56de\u6536\u6389\u53ea\u88ab\u5f31\u5f15\u7528\u5173\u8054\u7684\u5bf9\u8c61\u3002\u200b<\/li>\n<\/ul>\n<ul>\n<li>\u865a\u5f15\u7528&#xff1a;\u4e5f\u79f0\u4e3a \u201c\u5e7d\u7075\u5f15\u7528\u201d \u6216 \u201c\u5e7b\u5f71\u5f15\u7528\u201d&#xff0c;\u662f\u6700\u5f31\u7684\u4e00\u79cd\u5f15\u7528\u5173\u7cfb\u3002\u4e00\u4e2a\u5bf9\u8c61\u662f\u5426\u6709\u865a\u5f15\u7528\u7684\u5b58\u5728&#xff0c;\u5b8c\u5168\u4e0d\u4f1a\u5bf9\u5176\u751f\u5b58\u65f6\u95f4\u6784\u6210\u5f71\u54cd&#xff0c;\u4e5f\u65e0\u6cd5\u901a\u8fc7\u865a\u5f15\u7528\u6765\u83b7\u53d6\u4e00\u4e2a\u5bf9\u8c61\u7684\u5b9e\u4f8b\u3002\u5b83\u7684\u552f\u4e00\u76ee\u7684\u662f\u5728\u8fd9\u4e2a\u5bf9\u8c61\u88ab\u6536\u96c6\u5668\u56de\u6536\u65f6\u6536\u5230\u4e00\u4e2a\u7cfb\u7edf\u901a\u77e5\u3002\u200b<\/li>\n<\/ul>\n<h3 id=\"3.%20%E5%9E%83%E5%9C%BE%E6%B8%85%E7%90%86%E7%AE%97%E6%B3%95%EF%BC%9A%E5%A6%82%E4%BD%95%E9%87%8A%E6%94%BE%E5%86%85%E5%AD%98%E2%80%8B\">3. \u5783\u573e\u6e05\u7406\u7b97\u6cd5&#xff1a;\u5982\u4f55\u91ca\u653e\u5185\u5b58\u200b<\/h3>\n<ul>\n<li>\u6807\u8bb0 &#8211; \u6e05\u9664\u7b97\u6cd5&#xff1a;\u9996\u5148\u6807\u8bb0\u51fa\u6240\u6709\u9700\u8981\u56de\u6536\u7684\u5bf9\u8c61&#xff0c;\u5728\u6807\u8bb0\u5b8c\u6210\u540e\u7edf\u4e00\u56de\u6536\u6240\u6709\u88ab\u6807\u8bb0\u7684\u5bf9\u8c61\u3002\u6b64\u7b97\u6cd5\u7684\u4e0d\u8db3\u662f&#xff1a;\u6807\u8bb0\u548c\u6e05\u9664\u8fc7\u7a0b\u6548\u7387\u4e0d\u9ad8&#xff1b;\u6e05\u9664\u540e\u4f1a\u4ea7\u751f\u5927\u91cf\u4e0d\u8fde\u7eed\u7684\u5185\u5b58\u788e\u7247&#xff0c;\u5bfc\u81f4\u540e\u7eed\u9700\u8981\u5206\u914d\u8f83\u5927\u5bf9\u8c61\u65f6&#xff0c;\u65e0\u6cd5\u627e\u5230\u8db3\u591f\u7684\u8fde\u7eed\u5185\u5b58\u800c\u4e0d\u5f97\u4e0d\u63d0\u524d\u89e6\u53d1\u53e6\u4e00\u6b21\u5783\u573e\u56de\u6536\u3002\u200b<\/li>\n<\/ul>\n<ul>\n<li>\u6807\u8bb0 &#8211; \u590d\u5236\u7b97\u6cd5&#xff1a;\u5c06\u53ef\u7528\u5185\u5b58\u6309\u5bb9\u91cf\u5212\u5206\u4e3a\u5927\u5c0f\u76f8\u7b49\u7684\u4e24\u5757&#xff0c;\u6bcf\u6b21\u53ea\u4f7f\u7528\u5176\u4e2d\u4e00\u5757\u3002\u5f53\u8fd9\u4e00\u5757\u7684\u5185\u5b58\u7528\u5b8c\u4e86&#xff0c;\u5c31\u5c06\u8fd8\u5b58\u6d3b\u7740\u7684\u5bf9\u8c61\u590d\u5236\u5230\u53e6\u4e00\u5757\u4e0a\u9762&#xff0c;\u7136\u540e\u518d\u628a\u5df2\u4f7f\u7528\u8fc7\u7684\u5185\u5b58\u7a7a\u95f4\u4e00\u6b21\u6e05\u7406\u6389\u3002\u8fd9\u79cd\u7b97\u6cd5\u907f\u514d\u4e86\u5185\u5b58\u788e\u7247&#xff0c;\u4f46\u4ee3\u4ef7\u662f\u5c06\u5185\u5b58\u7f29\u5c0f\u4e3a\u539f\u6765\u7684\u4e00\u534a&#xff0c;\u6bd4\u8f83\u9002\u5408\u65b0\u751f\u4ee3&#xff08;\u65b0\u751f\u4ee3\u5bf9\u8c61\u5b58\u6d3b\u7387\u4f4e&#xff0c;\u590d\u5236\u6210\u672c\u4f4e&#xff09;\u3002\u200b<\/li>\n<\/ul>\n<ul>\n<li>\u6807\u8bb0 &#8211; \u6574\u7406\u7b97\u6cd5&#xff1a;\u6807\u8bb0\u8fc7\u7a0b\u4e0e \u201c\u6807\u8bb0 &#8211; \u6e05\u9664\u201d \u7b97\u6cd5\u4e00\u6837&#xff0c;\u4f46\u540e\u7eed\u6b65\u9aa4\u4e0d\u662f\u76f4\u63a5\u5bf9\u53ef\u56de\u6536\u5bf9\u8c61\u8fdb\u884c\u6e05\u7406&#xff0c;\u800c\u662f\u8ba9\u6240\u6709\u5b58\u6d3b\u7684\u5bf9\u8c61\u90fd\u5411\u4e00\u7aef\u79fb\u52a8&#xff0c;\u7136\u540e\u76f4\u63a5\u6e05\u7406\u6389\u7aef\u8fb9\u754c\u4ee5\u5916\u7684\u5185\u5b58\u3002\u8fd9\u79cd\u7b97\u6cd5\u9002\u7528\u4e8e\u8001\u5e74\u4ee3&#xff08;\u8001\u5e74\u4ee3\u5bf9\u8c61\u5b58\u6d3b\u7387\u9ad8&#xff0c;\u590d\u5236\u6210\u672c\u9ad8&#xff09;&#xff0c;\u907f\u514d\u4e86\u5185\u5b58\u788e\u7247&#xff0c;\u4e14\u4e0d\u9700\u8981\u727a\u7272\u4e00\u534a\u5185\u5b58\u7a7a\u95f4\u3002\u200b<\/li>\n<\/ul>\n<ul>\n<li>\u5206\u4ee3\u6536\u96c6\u7b97\u6cd5&#xff1a;\u5f53\u524d\u5546\u4e1a\u865a\u62df\u673a\u7684\u5783\u573e\u6536\u96c6\u90fd\u91c7\u7528 \u201c\u5206\u4ee3\u6536\u96c6\u201d \u7b97\u6cd5&#xff0c;\u5176\u6838\u5fc3\u601d\u60f3\u662f\u6839\u636e\u5bf9\u8c61\u5b58\u6d3b\u5468\u671f\u7684\u4e0d\u540c\u5c06\u5185\u5b58\u5212\u5206\u4e3a\u51e0\u5757&#xff08;\u65b0\u751f\u4ee3\u548c\u8001\u5e74\u4ee3&#xff09;&#xff0c;\u6839\u636e\u5404\u5e74\u4ee3\u7684\u7279\u70b9\u91c7\u7528\u6700\u9002\u5f53\u7684\u6536\u96c6\u7b97\u6cd5\u3002\u65b0\u751f\u4ee3\u4e2d&#xff0c;\u6bcf\u6b21\u5783\u573e\u6536\u96c6\u65f6\u90fd\u53d1\u73b0\u6709\u5927\u91cf\u5bf9\u8c61\u6b7b\u53bb&#xff0c;\u53ea\u6709\u5c11\u91cf\u5b58\u6d3b&#xff0c;\u91c7\u7528 \u201c\u6807\u8bb0 &#8211; \u590d\u5236\u201d \u7b97\u6cd5&#xff1b;\u8001\u5e74\u4ee3\u4e2d&#xff0c;\u5bf9\u8c61\u5b58\u6d3b\u7387\u9ad8\u3001\u6ca1\u6709\u989d\u5916\u7a7a\u95f4\u5bf9\u5b83\u8fdb\u884c\u5206\u914d\u62c5\u4fdd&#xff0c;\u5c31\u91c7\u7528 \u201c\u6807\u8bb0 &#8211; \u6e05\u7406\u201d \u6216 \u201c\u6807\u8bb0 &#8211; \u6574\u7406\u201d \u7b97\u6cd5\u3002\u200b<\/li>\n<\/ul>\n<h2 id=\"%E4%B8%89%E3%80%81%E5%9E%83%E5%9C%BE%E5%9B%9E%E6%94%B6%E5%99%A8%EF%BC%9A%E7%AE%97%E6%B3%95%E7%9A%84%20%E2%80%9C%E5%85%B7%E4%BD%93%E5%AE%9E%E7%8E%B0%E8%80%85%E2%80%9D%E2%80%8B\">\u4e09\u3001\u5783\u573e\u56de\u6536\u5668&#xff1a;\u7b97\u6cd5\u7684 \u201c\u5177\u4f53\u5b9e\u73b0\u8005\u201d\u200b<\/h2>\n<p>\u5783\u573e\u56de\u6536\u5668\u662f\u5783\u573e\u56de\u6536\u7b97\u6cd5\u7684\u5177\u4f53\u5b9e\u73b0&#xff0c;\u4e0d\u540c\u7684\u5783\u573e\u56de\u6536\u5668\u6709\u4e0d\u540c\u7684\u7279\u70b9\u548c\u9002\u7528\u573a\u666f\u3002\u200b<\/p>\n<h3 id=\"1.%20Serial%20%E6%94%B6%E9%9B%86%E5%99%A8%E2%80%8B\">1. Serial \u6536\u96c6\u5668\u200b<\/h3>\n<p>Serial \u6536\u96c6\u5668\u662f\u6700\u57fa\u672c\u3001\u5386\u53f2\u6700\u60a0\u4e45\u7684\u5783\u573e\u6536\u96c6\u5668&#xff0c;\u5b83\u662f\u4e00\u4e2a\u5355\u7ebf\u7a0b\u6536\u96c6\u5668\u3002\u5b83\u5728\u8fdb\u884c\u5783\u573e\u6536\u96c6\u65f6&#xff0c;\u5fc5\u987b\u6682\u505c\u5176\u4ed6\u6240\u6709\u5de5\u4f5c\u7ebf\u7a0b&#xff08;\u201cStop The World\u201d&#xff09;&#xff0c;\u76f4\u5230\u5b83\u6536\u96c6\u7ed3\u675f\u3002\u867d\u7136\u4f1a\u5e26\u6765\u505c\u987f&#xff0c;\u4f46 Serial \u6536\u96c6\u5668\u7b80\u5355\u9ad8\u6548&#xff0c;\u5bf9\u4e8e\u5355\u4e2a CPU \u73af\u5883\u6765\u8bf4&#xff0c;\u6ca1\u6709\u7ebf\u7a0b\u4ea4\u4e92\u7684\u5f00\u9500&#xff0c;\u4e13\u5fc3\u505a\u5783\u573e\u6536\u96c6\u81ea\u7136\u53ef\u4ee5\u83b7\u5f97\u6700\u9ad8\u7684\u5355\u7ebf\u7a0b\u6536\u96c6\u6548\u7387\u3002\u5728 Client \u6a21\u5f0f\u4e0b\u7684\u865a\u62df\u673a\u4e2d&#xff0c;Serial \u6536\u96c6\u5668\u662f\u9ed8\u8ba4\u7684\u65b0\u751f\u4ee3\u6536\u96c6\u5668\u3002\u200b<\/p>\n<h3 id=\"2.%20ParNew%20%E6%94%B6%E9%9B%86%E5%99%A8%E2%80%8B\">2. ParNew \u6536\u96c6\u5668\u200b<\/h3>\n<p>ParNew \u6536\u96c6\u5668\u662f Serial \u6536\u96c6\u5668\u7684\u591a\u7ebf\u7a0b\u7248\u672c&#xff0c;\u9664\u4e86\u4f7f\u7528\u591a\u7ebf\u7a0b\u8fdb\u884c\u5783\u573e\u6536\u96c6\u5916&#xff0c;\u5176\u4f59\u884c\u4e3a&#xff08;\u5982\u56de\u6536\u7b97\u6cd5\u3001Stop The World\u3001\u5185\u5b58\u5206\u914d\u89c4\u5219\u3001\u56de\u6536\u7b56\u7565\u7b49&#xff09;\u90fd\u4e0e Serial \u6536\u96c6\u5668\u5b8c\u5168\u4e00\u6837\u3002\u5b83\u662f\u8bb8\u591a\u8fd0\u884c\u5728 Server \u6a21\u5f0f\u4e0b\u7684\u865a\u62df\u673a\u4e2d\u9996\u9009\u7684\u65b0\u751f\u4ee3\u6536\u96c6\u5668&#xff0c;\u4e3b\u8981\u539f\u56e0\u662f\u5b83\u80fd\u4e0e CMS \u6536\u96c6\u5668\u914d\u5408\u5de5\u4f5c&#xff08;CMS \u662f\u8001\u5e74\u4ee3\u6536\u96c6\u5668&#xff0c;\u53ef\u4e0e ParNew \u7ec4\u5408\u4f7f\u7528&#xff09;\u3002\u200b<\/p>\n<h3 id=\"3.%20Parallel%20Scavenge%20%E6%94%B6%E9%9B%86%E5%99%A8%E2%80%8B\">3. Parallel Scavenge \u6536\u96c6\u5668\u200b<\/h3>\n<p>Parallel Scavenge \u6536\u96c6\u5668\u662f\u4e00\u4e2a\u65b0\u751f\u4ee3\u6536\u96c6\u5668&#xff0c;\u4f7f\u7528\u6807\u8bb0 &#8211; \u590d\u5236\u7b97\u6cd5&#xff0c;\u4e5f\u662f\u591a\u7ebf\u7a0b\u6536\u96c6\u5668\u3002\u5b83\u7684\u76ee\u6807\u662f\u8fbe\u5230\u4e00\u4e2a\u53ef\u63a7\u5236\u7684\u541e\u5410\u91cf&#xff08;\u541e\u5410\u91cf &#061; \u8fd0\u884c\u7528\u6237\u4ee3\u7801\u65f6\u95f4 \/(\u8fd0\u884c\u7528\u6237\u4ee3\u7801\u65f6\u95f4 &#043; \u5783\u573e\u6536\u96c6\u65f6\u95f4)&#xff09;\u3002\u9ad8\u541e\u5410\u91cf\u610f\u5473\u7740\u9ad8\u6548\u5229\u7528 CPU \u65f6\u95f4&#xff0c;\u9002\u5408\u5728\u540e\u53f0\u8fd0\u7b97\u800c\u4e0d\u9700\u8981\u592a\u591a\u4ea4\u4e92\u7684\u4efb\u52a1\u3002Parallel Scavenge \u6536\u96c6\u5668\u63d0\u4f9b\u4e86\u4e24\u4e2a\u53c2\u6570\u7528\u4e8e\u7cbe\u786e\u63a7\u5236\u541e\u5410\u91cf&#xff1a;-XX:MaxGCPauseMillis&#xff08;\u63a7\u5236\u6700\u5927\u5783\u573e\u6536\u96c6\u505c\u987f\u65f6\u95f4&#xff09;\u548c &#8211; XX:GCTimeRatio&#xff08;\u8bbe\u7f6e\u541e\u5410\u91cf\u5927\u5c0f&#xff09;\u3002\u200b<\/p>\n<h3 id=\"4.%20Serial%20Old%20%E6%94%B6%E9%9B%86%E5%99%A8%E2%80%8B\">4. Serial Old \u6536\u96c6\u5668\u200b<\/h3>\n<p>Serial Old \u662f Serial \u6536\u96c6\u5668\u7684\u8001\u5e74\u4ee3\u7248\u672c&#xff0c;\u5355\u7ebf\u7a0b\u6536\u96c6\u5668&#xff0c;\u4f7f\u7528\u6807\u8bb0 &#8211; \u6574\u7406\u7b97\u6cd5\u3002\u4e3b\u8981\u7528\u4e8e Client \u6a21\u5f0f\u4e0b\u7684\u865a\u62df\u673a&#xff0c;\u5728 Server \u6a21\u5f0f\u4e0b&#xff0c;\u5b83\u53ef\u4f5c\u4e3a CMS \u6536\u96c6\u5668\u7684\u540e\u5907\u9884\u6848&#xff0c;\u5728 CMS \u6536\u96c6\u53d1\u751f Concurrent Mode Failure \u65f6\u4f7f\u7528\u3002\u200b<\/p>\n<h3 id=\"5.%20Parallel%20Old%20%E6%94%B6%E9%9B%86%E5%99%A8%E2%80%8B\">5. Parallel Old \u6536\u96c6\u5668\u200b<\/h3>\n<p>Parallel Old \u662f Parallel Scavenge \u6536\u96c6\u5668\u7684\u8001\u5e74\u4ee3\u7248\u672c&#xff0c;\u4f7f\u7528\u591a\u7ebf\u7a0b\u548c\u6807\u8bb0 &#8211; \u6574\u7406\u7b97\u6cd5\u3002\u5b83\u7684\u51fa\u73b0\u4f7f\u5f97 \u201cParallel Scavenge &#043; Parallel Old\u201d \u7ec4\u5408\u6210\u4e3a\u4e86\u6ce8\u91cd\u541e\u5410\u91cf\u7684\u5e94\u7528\u7a0b\u5e8f\u7684\u9996\u9009&#xff0c;\u5728\u5927\u578b\u670d\u52a1\u5668\u7aef\u5e94\u7528\u4e2d\u8868\u73b0\u51fa\u8272\u3002\u200b<\/p>\n<h3 id=\"6.%20CMS%20%E6%94%B6%E9%9B%86%E5%99%A8%E2%80%8B\">6. CMS \u6536\u96c6\u5668\u200b<\/h3>\n<p>CMS&#xff08;Concurrent Mark Sweep&#xff09;\u6536\u96c6\u5668\u662f\u4e00\u79cd\u4ee5\u83b7\u53d6\u6700\u77ed\u56de\u6536\u505c\u987f\u65f6\u95f4\u4e3a\u76ee\u6807\u7684\u6536\u96c6\u5668\u3002\u5b83\u57fa\u4e8e \u201c\u6807\u8bb0 &#8211; \u6e05\u9664\u201d \u7b97\u6cd5\u5b9e\u73b0&#xff0c;\u5de5\u4f5c\u8fc7\u7a0b\u5206\u4e3a\u56db\u4e2a\u6b65\u9aa4&#xff1a;\u521d\u59cb\u6807\u8bb0\u3001\u5e76\u53d1\u6807\u8bb0\u3001\u91cd\u65b0\u6807\u8bb0\u3001\u5e76\u53d1\u6e05\u9664\u3002\u5176\u4e2d&#xff0c;\u521d\u59cb\u6807\u8bb0\u548c\u91cd\u65b0\u6807\u8bb0\u4ecd\u9700\u8981 \u201cStop The World\u201d&#xff0c;\u4f46\u521d\u59cb\u6807\u8bb0\u4ec5\u6807\u8bb0 GC Roots \u80fd\u76f4\u63a5\u5173\u8054\u5230\u7684\u5bf9\u8c61&#xff0c;\u901f\u5ea6\u5f88\u5feb&#xff1b;\u5e76\u53d1\u6807\u8bb0\u9636\u6bb5\u662f\u4ece GC Roots \u7684\u76f4\u63a5\u5173\u8054\u5bf9\u8c61\u5f00\u59cb\u904d\u5386\u6574\u4e2a\u5bf9\u8c61\u56fe\u7684\u8fc7\u7a0b&#xff0c;\u8017\u65f6\u8f83\u957f\u4f46\u53ef\u4e0e\u7528\u6237\u7ebf\u7a0b\u5e76\u53d1\u6267\u884c&#xff1b;\u91cd\u65b0\u6807\u8bb0\u9636\u6bb5\u662f\u4e3a\u4e86\u4fee\u6b63\u5e76\u53d1\u6807\u8bb0\u671f\u95f4\u56e0\u7528\u6237\u7ebf\u7a0b\u7ee7\u7eed\u8fd0\u4f5c\u800c\u5bfc\u81f4\u6807\u8bb0\u4ea7\u751f\u53d8\u52a8\u7684\u90a3\u4e00\u90e8\u5206\u5bf9\u8c61\u7684\u6807\u8bb0\u8bb0\u5f55&#xff0c;\u8017\u65f6\u6bd4\u521d\u59cb\u6807\u8bb0\u957f&#xff0c;\u4f46\u8fdc\u5c0f\u4e8e\u5e76\u53d1\u6807\u8bb0&#xff1b;\u5e76\u53d1\u6e05\u9664\u9636\u6bb5\u6e05\u7406\u5220\u9664\u6389\u6807\u8bb0\u9636\u6bb5\u5224\u65ad\u7684\u5df2\u7ecf\u6b7b\u4ea1\u7684\u5bf9\u8c61&#xff0c;\u53ef\u4e0e\u7528\u6237\u7ebf\u7a0b\u5e76\u53d1\u6267\u884c\u3002\u200b<\/p>\n<p>CMS \u6536\u96c6\u5668\u7684\u4f18\u70b9\u662f\u5e76\u53d1\u6536\u96c6\u3001\u4f4e\u505c\u987f&#xff0c;\u4f46\u4e5f\u5b58\u5728\u4e00\u4e9b\u7f3a\u70b9&#xff1a;\u5bf9 CPU \u8d44\u6e90\u975e\u5e38\u654f\u611f&#xff08;\u5e76\u53d1\u9636\u6bb5\u4f1a\u5360\u7528\u4e00\u90e8\u5206 CPU \u8d44\u6e90&#xff0c;\u5f71\u54cd\u7528\u6237\u7ebf\u7a0b\u6267\u884c&#xff09;&#xff1b;\u65e0\u6cd5\u5904\u7406\u6d6e\u52a8\u5783\u573e&#xff08;\u5e76\u53d1\u6e05\u9664\u9636\u6bb5\u7528\u6237\u7ebf\u7a0b\u4ea7\u751f\u7684\u65b0\u5783\u573e&#xff0c;\u53ea\u80fd\u5230\u4e0b\u4e00\u6b21 GC \u518d\u6e05\u7406&#xff09;&#xff1b;\u57fa\u4e8e \u201c\u6807\u8bb0 &#8211; \u6e05\u9664\u201d \u7b97\u6cd5&#xff0c;\u4f1a\u4ea7\u751f\u5927\u91cf\u5185\u5b58\u788e\u7247&#xff0c;\u53ef\u80fd\u5bfc\u81f4\u9891\u7e41\u7684 Full GC\u3002\u200b<\/p>\n<h3 id=\"7.%20G1%20%E6%94%B6%E9%9B%86%E5%99%A8%E2%80%8B\">7. G1 \u6536\u96c6\u5668\u200b<\/h3>\n<p>G1&#xff08;Garbage-First&#xff09;\u6536\u96c6\u5668\u662f\u9762\u5411\u670d\u52a1\u7aef\u5e94\u7528\u7684\u5783\u573e\u6536\u96c6\u5668&#xff0c;\u5b83\u7684\u7279\u70b9\u5305\u62ec&#xff1a;\u5e76\u884c\u4e0e\u5e76\u53d1&#xff08;\u5145\u5206\u5229\u7528\u591a CPU\u3001\u591a\u6838\u73af\u5883\u7684\u786c\u4ef6\u4f18\u52bf&#xff0c;\u7f29\u77ed Stop The World \u505c\u987f\u65f6\u95f4&#xff09;&#xff1b;\u5206\u4ee3\u6536\u96c6&#xff08;\u4e0d\u9700\u8981\u5176\u4ed6\u6536\u96c6\u5668\u914d\u5408\u5c31\u80fd\u72ec\u7acb\u7ba1\u7406\u6574\u4e2a\u5806&#xff09;&#xff1b;\u7a7a\u95f4\u6574\u5408&#xff08;\u57fa\u4e8e\u6807\u8bb0 &#8211; \u6574\u7406\u7b97\u6cd5&#xff0c;\u5c40\u90e8\u57fa\u4e8e\u6807\u8bb0 &#8211; \u590d\u5236\u7b97\u6cd5&#xff0c;\u4e0d\u4f1a\u4ea7\u751f\u5185\u5b58\u788e\u7247&#xff09;&#xff1b;\u53ef\u9884\u6d4b\u7684\u505c\u987f&#xff08;\u80fd\u8ba9\u4f7f\u7528\u8005\u660e\u786e\u6307\u5b9a\u5728\u4e00\u4e2a\u957f\u5ea6\u4e3a M \u6beb\u79d2\u7684\u65f6\u95f4\u7247\u6bb5\u5185&#xff0c;\u6d88\u8017\u5728\u5783\u573e\u6536\u96c6\u4e0a\u7684\u65f6\u95f4\u4e0d\u5f97\u8d85\u8fc7 N \u6beb\u79d2&#xff09;\u3002\u200b<\/p>\n<p>G1 \u6536\u96c6\u5668\u5c06\u6574\u4e2a Java \u5806\u5212\u5206\u4e3a\u591a\u4e2a\u5927\u5c0f\u76f8\u7b49\u7684\u72ec\u7acb\u533a\u57df&#xff08;Region&#xff09;&#xff0c;\u867d\u7136\u8fd8\u4fdd\u7559\u65b0\u751f\u4ee3\u548c\u8001\u5e74\u4ee3\u7684\u6982\u5ff5&#xff0c;\u4f46\u5b83\u4eec\u4e0d\u518d\u662f\u7269\u7406\u9694\u79bb\u7684&#xff0c;\u800c\u662f\u4e00\u90e8\u5206 Region \u7684\u96c6\u5408\u3002G1 \u7684\u8fd0\u4f5c\u8fc7\u7a0b\u5927\u81f4\u53ef\u5206\u4e3a\u56db\u4e2a\u6b65\u9aa4&#xff1a;\u521d\u59cb\u6807\u8bb0\u3001\u5e76\u53d1\u6807\u8bb0\u3001\u6700\u7ec8\u6807\u8bb0\u3001\u7b5b\u9009\u56de\u6536\u3002\u7b5b\u9009\u56de\u6536\u9636\u6bb5\u4f1a\u6839\u636e\u6bcf\u4e2a Region \u7684\u56de\u6536\u4ef7\u503c&#xff08;\u56de\u6536\u6240\u83b7\u5f97\u7684\u7a7a\u95f4\u5927\u5c0f\u4ee5\u53ca\u56de\u6536\u6240\u9700\u65f6\u95f4&#xff09;\u548c\u6210\u672c&#xff0c;\u6392\u5e8f\u51fa\u4e00\u4e2a\u56de\u6536\u8ba1\u5212&#xff0c;\u4f18\u5148\u56de\u6536\u4ef7\u503c\u9ad8\u7684 Region&#xff0c;\u8fd9\u4e5f\u662f \u201cGarbage-First\u201d \u540d\u79f0\u7684\u7531\u6765\u3002\u200b<\/p>\n<h2 id=\"%E5%9B%9B%E3%80%81%E6%80%BB%E7%BB%93%EF%BC%9A%E4%BC%98%E5%8C%96%20Java%20%E7%A8%8B%E5%BA%8F%E7%9A%84%E5%86%85%E5%AD%98%E7%AE%A1%E7%90%86%E2%80%8B\">\u56db\u3001\u603b\u7ed3&#xff1a;\u4f18\u5316 Java \u7a0b\u5e8f\u7684\u5185\u5b58\u7ba1\u7406\u200b<\/h2>\n<p>\u7406\u89e3 JVM \u5185\u5b58\u7ed3\u6784\u548c\u5783\u573e\u56de\u6536\u673a\u5236&#xff0c;\u662f\u7f16\u5199\u9ad8\u6027\u80fd\u3001\u9ad8\u7a33\u5b9a\u6027 Java \u7a0b\u5e8f\u7684\u57fa\u7840\u3002\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d&#xff0c;\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u4f18\u5316\u5185\u5b58\u7ba1\u7406&#xff1a;\u200b<\/p>\n<ul>\n<li>\u5408\u7406\u8bbe\u7f6e\u5806\u5185\u5b58\u5927\u5c0f&#xff08;-Xms \u548c &#8211; Xmx&#xff09;&#xff0c;\u907f\u514d\u5806\u5185\u5b58\u8fc7\u5c0f\u5bfc\u81f4\u9891\u7e41 GC&#xff0c;\u6216\u8fc7\u5927\u9020\u6210\u5185\u5b58\u6d6a\u8d39\u3002\u200b<\/li>\n<\/ul>\n<ul>\n<li>\u6839\u636e\u5e94\u7528\u7279\u70b9\u9009\u62e9\u5408\u9002\u7684\u5783\u573e\u56de\u6536\u5668&#xff0c;\u5982\u5bf9\u54cd\u5e94\u65f6\u95f4\u8981\u6c42\u9ad8\u7684\u5e94\u7528\u53ef\u9009\u62e9 G1 \u6216 CMS&#xff0c;\u5bf9\u541e\u5410\u91cf\u8981\u6c42\u9ad8\u7684\u5e94\u7528\u53ef\u9009\u62e9 Parallel Scavenge &#043; Parallel Old\u3002\u200b<\/li>\n<\/ul>\n<ul>\n<li>\u907f\u514d\u521b\u5efa\u8fc7\u591a\u7684\u4e34\u65f6\u5bf9\u8c61&#xff0c;\u51cf\u5c11 GC \u538b\u529b\u3002\u200b<\/li>\n<\/ul>\n<ul>\n<li>\u6b63\u786e\u4f7f\u7528\u5bf9\u8c61\u5f15\u7528\u7c7b\u578b&#xff0c;\u5bf9\u4e8e\u7f13\u5b58\u7b49\u573a\u666f&#xff0c;\u53ef\u4f7f\u7528\u8f6f\u5f15\u7528\u6216\u5f31\u5f15\u7528&#xff0c;\u907f\u514d\u5185\u5b58\u6cc4\u6f0f\u3002\u200b<\/li>\n<\/ul>\n<p>JVM \u7684\u5185\u5b58\u7ba1\u7406\u548c\u5783\u573e\u56de\u6536\u662f\u4e00\u4e2a\u590d\u6742\u800c\u7cbe\u5999\u7684\u7cfb\u7edf&#xff0c;\u6df1\u5165\u5b66\u4e60\u548c\u5b9e\u8df5&#xff0c;\u624d\u80fd\u8ba9\u6211\u4eec\u5728 Java \u5f00\u53d1\u7684\u9053\u8def\u4e0a\u8d70\u5f97\u66f4\u8fdc\u3002\u5e0c\u671b\u672c\u6587\u80fd\u4e3a\u4f60\u6253\u5f00\u4e00\u6247\u901a\u5f80 JVM \u5e95\u5c42\u4e16\u754c\u7684\u5927\u95e8&#xff0c;\u8ba9\u4f60\u5bf9 Java \u7a0b\u5e8f\u7684\u8fd0\u884c\u673a\u5236\u6709\u66f4\u6e05\u6670\u7684\u8ba4\u8bc6\u3002\u200b<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb292\u6b21\uff0c\u70b9\u8d5e4\u6b21\uff0c\u6536\u85cf2\u6b21\u3002\u5728 Java \u5f00\u53d1\u4e2d\uff0c\u6211\u4eec\u5e38\u5e38\u4e13\u6ce8\u4e8e\u4e1a\u52a1\u903b\u8f91\u7684\u5b9e\u73b0\uff0c\u5374\u5f88\u5c11\u76f4\u9762\u7a0b\u5e8f\u8fd0\u884c\u65f6\u7684 \u201c\u5e55\u540e\u7ba1\u5bb6\u201d\u2014\u2014JVM\uff08Java \u865a\u62df\u673a\uff09\u3002\u5b83\u9ed8\u9ed8\u627f\u62c5\u7740\u5185\u5b58\u5206\u914d\u3001\u56de\u6536\u548c\u8d44\u6e90\u8c03\u5ea6\u7684\u91cd\u4efb\uff0c\u76f4\u63a5\u5f71\u54cd\u7740\u7a0b\u5e8f\u7684\u6027\u80fd\u4e0e\u7a33\u5b9a\u6027\u3002\u672c\u6587\u5c06\u5e26\u4f60\u6df1\u5165\u5256\u6790 JVM \u7684\u5185\u5b58\u7ed3\u6784\u3001\u5783\u573e\u56de\u6536\u7b97\u6cd5\u53ca\u5783\u573e\u56de\u6536\u5668\u7684\u5de5\u4f5c\u539f\u7406\uff0c\u5e2e\u4f60\u63ed\u5f00 Java \u5185\u5b58\u7ba1\u7406\u7684\u795e\u79d8\u9762\u7eb1\u3002<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[99,426,190],"topic":[],"class_list":["post-58798","post","type-post","status-publish","format-standard","hentry","category-server","tag-java","tag-jvm","tag-190"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>JVM \u5185\u5b58\u7ba1\u7406\u4e0e\u5783\u573e\u56de\u6536\u673a\u5236\uff1a\u6df1\u5165\u7406\u89e3 Java \u7a0b\u5e8f\u7684 \u201c\u5e55\u540e\u7ba1\u5bb6\u201d - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/58798.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"JVM \u5185\u5b58\u7ba1\u7406\u4e0e\u5783\u573e\u56de\u6536\u673a\u5236\uff1a\u6df1\u5165\u7406\u89e3 Java \u7a0b\u5e8f\u7684 \u201c\u5e55\u540e\u7ba1\u5bb6\u201d - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb292\u6b21\uff0c\u70b9\u8d5e4\u6b21\uff0c\u6536\u85cf2\u6b21\u3002\u5728 Java \u5f00\u53d1\u4e2d\uff0c\u6211\u4eec\u5e38\u5e38\u4e13\u6ce8\u4e8e\u4e1a\u52a1\u903b\u8f91\u7684\u5b9e\u73b0\uff0c\u5374\u5f88\u5c11\u76f4\u9762\u7a0b\u5e8f\u8fd0\u884c\u65f6\u7684 \u201c\u5e55\u540e\u7ba1\u5bb6\u201d\u2014\u2014JVM\uff08Java 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