{"id":56710,"date":"2023-10-14T21:39:45","date_gmt":"2023-10-14T13:39:45","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=56710"},"modified":"2023-10-14T21:50:26","modified_gmt":"2023-10-14T13:50:26","slug":"%e6%80%8e%e6%a0%b7%e7%9b%91%e6%8e%a7jvm-ygc%e7%9a%84%e5%81%a5%e5%ba%b7%e7%8a%b6%e6%80%81","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/56710.html","title":{"rendered":"\u600e\u6837\u76d1\u63a7JVM ygc\u7684\u5065\u5eb7\u72b6\u6001"},"content":{"rendered":"\n
\n

JVM\uff08Java\u865a\u62df\u673a\uff09\u7684\u5783\u573e\u56de\u6536\uff08GC\uff09\u8fc7\u7a0b\u5bf9Java\u5e94\u7528\u7684\u6027\u80fd\u4ea7\u751f\u6df1\u8fdc\u5f71\u54cd\u3002\u5c24\u5176\u662f\u5e74\u8f7b\u4ee3\u5783\u573e\u56de\u6536\uff08YGC\uff09\uff0c\u5b83\u5728Java\u5185\u5b58\u7ba1\u7406\u4e2d\u8d77\u7740\u5173\u952e\u4f5c\u7528\u3002\u672c\u6587\u6df1\u5165\u63a2\u8ba8\u5982\u4f55\u76d1\u63a7JVM YGC\u7684\u5065\u5eb7\u72b6\u6001\uff0c\u901a\u8fc7\u5b9e\u73b0\u7cbe\u786e\u7684\u76d1\u63a7\u548c\u5206\u6790\u624b\u6bb5\uff0c\u6211\u4eec\u4e0d\u4ec5\u53ef\u4ee5\u53ca\u65f6\u53d1\u73b0\u548c\u89e3\u51b3\u6f5c\u5728\u95ee\u9898\uff0c\u8fd8\u53ef\u4ee5\u4f18\u5316\u7cfb\u7edf\u6027\u80fd\uff0c\u4e3a\u7528\u6237\u63d0\u4f9b\u6d41\u7545\u7684\u4f7f\u7528\u4f53\u9a8c\u3002\u6587\u7ae0\u8fd8\u5c06\u5f15\u5bfc\u4f60\u901a\u8fc7\u4e00\u7cfb\u5217\u7684\u6b65\u9aa4\u548c\u5de5\u5177\uff0c\u4e86\u89e3\u548c\u5e94\u7528\u5b9e\u8df5\u4e2d\u7684\u5173\u952e\u76d1\u63a7\u7b56\u7565\uff0c\u5e76\u501f\u52a9\u771f\u5b9e\u573a\u666f\u6848\u4f8b\uff0c\u66f4\u76f4\u89c2\u5730\u7406\u89e3YGC\u76d1\u63a7\u7684\u91cd\u8981\u6027\u548c\u5b9e\u65bd\u65b9\u6cd5\u3002<\/p>\n<\/blockquote>\n\n\n\n

1.JVM<\/strong>\u548cYGC\u7b80\u4ecb<\/strong><\/h2>\n\n\n\n

Java\u865a\u62df\u673a\uff08JVM\uff09\u662fJava\u5e94\u7528\u7684\u8fd0\u884c\u73af\u5883\uff0c\u5b83\u8d1f\u8d23\u4ee3\u7801\u7684\u6267\u884c\u3001\u5185\u5b58\u7684\u5206\u914d\u548c\u5783\u573e\u56de\u6536\u7b49\u5173\u952e\u4efb\u52a1\u3002\u5e74\u8f7b\u4ee3\u5783\u573e\u56de\u6536\uff08YGC\uff09\u4e3b\u8981\u5173\u6ce8\u5bf9\u8c61\u7684\u521b\u5efa\u548c\u56de\u6536\uff0c\u56e0\u6b64\u5bf9\u7cfb\u7edf\u7684\u6027\u80fd\u548c\u54cd\u5e94\u901f\u5ea6\u4ea7\u751f\u76f4\u63a5\u5f71\u54cd\u3002\u6709\u6548\u76d1\u63a7YGC\uff0c\u662f\u7ef4\u62a4Java\u5e94\u7528\u5065\u5eb7\u8fd0\u884c\u7684\u57fa\u7840\u3002<\/p>\n\n\n\n

2.<\/strong>\u4e3a\u4ec0\u4e48\u8981\u76d1\u63a7YGC<\/strong><\/h2>\n\n\n\n

\u76d1\u63a7YGC\u7684\u76ee\u7684\u5728\u4e8e\u6355\u6349\u53ef\u80fd\u5f71\u54cd\u5e94\u7528\u6027\u80fd\u7684GC\u6d3b\u52a8\uff0c\u5e76\u91c7\u53d6\u9002\u5f53\u884c\u52a8\u9632\u6b62\u5176\u6210\u4e3a\u7cfb\u7edf\u74f6\u9888\u3002\u4e0d\u6070\u5f53\u7684GC\u884c\u4e3a\uff08\u4f8b\u5982\u9891\u7e41\u6216\u8fc7\u957f\u7684YGC\uff09\u53ef\u80fd\u5bfc\u81f4\u5e94\u7528\u5ef6\u8fdf\u589e\u52a0\u548c\u6027\u80fd\u4e0b\u964d\uff0c\u5f71\u54cd\u7528\u6237\u4f53\u9a8c\u548c\u7cfb\u7edf\u53ef\u9760\u6027\u3002<\/p>\n\n\n\n

3.<\/strong>\u5982\u4f55\u76d1\u63a7YGC<\/strong><\/h2>\n\n\n\n
    \n
  1. \u65e5\u5fd7\u5206\u6790<\/strong>\uff1a\u901a\u8fc7\u5f00\u542fJVM\u7684GC\u65e5\u5fd7\uff0c\u6211\u4eec\u53ef\u4ee5\u8bb0\u5f55\u548c\u5206\u6790GC\u6d3b\u52a8\uff0c\u5305\u62ecYGC\u7684\u53d1\u751f\u65f6\u95f4\u3001\u6301\u7eed\u65f6\u95f4\u548c\u56de\u6536\u6548\u679c\u3002<\/li>\n\n\n\n
  2. \u76d1\u63a7\u5de5\u5177<\/strong>\uff1a\u591a\u79cd\u76d1\u63a7\u5de5\u5177\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u5b9e\u65f6\u5173\u6ce8JVM\u7684\u72b6\u6001\u548cYGC\u7684\u6d3b\u52a8\uff0c\u4f8b\u5982JVisualVM\u3001Grafana\u7b49\u3002<\/li>\n\n\n\n
  3. \u6027\u80fd\u6307\u6807<\/strong>\uff1a\u5173\u6ce8\u548c\u5206\u6790\u5173\u952e\u6027\u80fd\u6307\u6807\uff0c\u4f8b\u5982YGC\u7684\u6b21\u6570\u3001\u6301\u7eed\u65f6\u95f4\u548c\u95f4\u9694\uff0c\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u53ca\u65f6\u53d1\u73b0\u5e76\u5206\u6790\u6027\u80fd\u95ee\u9898\u7684\u6839\u6e90\u3002<\/li>\n<\/ol>\n\n\n\n

    4.YGC<\/strong>\u5065\u5eb7\u72b6\u6001\u7684\u5224\u65ad\u4f9d\u636e<\/strong><\/h2>\n\n\n\n
      \n
    1. \u9891\u7387<\/strong>\uff1a\u5982\u679cYGC\u53d1\u751f\u5f97\u8fc7\u4e8e\u9891\u7e41\uff0c\u53ef\u80fd\u610f\u5473\u7740\u5e74\u8f7b\u4ee3\u7a7a\u95f4\u5206\u914d\u4e0d\u8db3\u6216\u5bf9\u8c61\u751f\u547d\u5468\u671f\u7ba1\u7406\u4e0d\u5f53\u3002<\/li>\n\n\n\n
    2. \u6301\u7eed\u65f6\u95f4<\/strong>\uff1a\u8fc7\u957f\u7684YGC\u6682\u505c\u65f6\u95f4\u53ef\u80fd\u5f71\u54cd\u5230\u5e94\u7528\u7684\u54cd\u5e94\u6027\u548c\u541e\u5410\u91cf\u3002<\/li>\n\n\n\n
    3. \u56de\u6536\u6548\u679c<\/strong>\uff1a\u5982\u679cYGC\u540e\u7a7a\u95f2\u5185\u5b58\u4e0d\u8db3\uff0c\u53ef\u80fd\u9700\u8981\u8c03\u6574\u5185\u5b58\u5206\u914d\u7b56\u7565\u3002<\/li>\n<\/ol>\n\n\n\n

      5.<\/strong>\u4f18\u5316\u7b56\u7565<\/strong><\/h2>\n\n\n\n

      \u57fa\u4e8e\u76d1\u63a7\u5f97\u51fa\u7684\u6570\u636e\u548c\u5206\u6790\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9e\u65bd\u4f18\u5316\u7b56\u7565\uff0c\u5305\u62ec\u8c03\u6574JVM\u53c2\u6570\u3001\u4f18\u5316\u4ee3\u7801\u548c\u6570\u636e\u7ed3\u6784\u3001\u6539\u8fdb\u5bf9\u8c61\u7ba1\u7406\u7b56\u7565\u7b49\uff0c\u4ece\u800c\u51cf\u5c11YGC\u7684\u8d1f\u9762\u5f71\u54cd\uff0c\u63d0\u5347\u7cfb\u7edf\u6027\u80fd\u3002<\/p>\n\n\n\n

      6.<\/strong>\u6848\u4f8b\u5206\u4eab<\/strong><\/h2>\n\n\n\n

      \u901a\u8fc7\u5b9e\u9645\u7684\u95ee\u9898\u5b9a\u4f4d\u548c\u89e3\u51b3\u6848\u4f8b\uff0c\u6211\u4eec\u53ef\u4ee5\u66f4\u6e05\u6670\u5730\u7406\u89e3YGC\u76d1\u63a7\u548c\u4f18\u5316\u7684\u5177\u4f53\u5b9e\u65bd\u6b65\u9aa4\u548c\u6548\u679c\u3002\u4f8b\u5982\uff0c\u5982\u4f55\u901a\u8fc7\u5206\u6790GC\u65e5\u5fd7\uff0c\u5b9a\u4f4d\u5230\u5bfc\u81f4\u9891\u7e41YGC\u7684\u4ee3\u7801\u95ee\u9898\uff0c\u5e76\u901a\u8fc7\u8c03\u6574\u5bf9\u8c61\u521b\u5efa\u548c\u7ba1\u7406\u7b56\u7565\uff0c\u663e\u8457\u6539\u5584\u7cfb\u7edf\u6027\u80fd\u3002<\/p>\n\n\n

      \n
      \"\"<\/figure><\/div>\n\n\n

      \u5e38\u89c1\u95ee\u7b54<\/strong><\/h2>\n\n\n\n

      1.<\/strong>\u4ec0\u4e48\u662fJVM Young Generation Collection\uff08ygc\uff09\u53ca\u5176\u91cd\u8981\u6027\uff1f<\/strong><\/p>\n\n\n\n

      JVM\uff08Java Virtual Machine\uff09\u7684\u5783\u573e\u6536\u96c6\uff08Garbage Collection, GC\uff09\u673a\u5236\u662f\u7528\u6765\u81ea\u52a8\u7ba1\u7406\u52a8\u6001\u5206\u914d\u7684\u5185\u5b58\u7684\u4e00\u79cd\u6280\u672f\u3002\u5176\u4e2d\uff0cYoung Generation Collection (ygc) \u662f\u6307 JVM \u4e2d\u5e74\u8f7b\u4ee3\uff08Young Generation\uff09\u7684\u5783\u573e\u6536\u96c6\u8fc7\u7a0b\u3002\u5e74\u8f7b\u4ee3\u901a\u5e38\u5305\u542b\u4e86\u65b0\u521b\u5efa\u7684\u3001\u751f\u547d\u5468\u671f\u8f83\u77ed\u7684\u5bf9\u8c61\u3002\u76d1\u63a7 ygc \u7684\u5065\u5eb7\u72b6\u6001\u662f\u5173\u952e\u7684\uff0c\u56e0\u4e3a\u9891\u7e41\u6216\u8017\u65f6\u7684 ygc \u4e8b\u4ef6\u53ef\u80fd\u5f71\u54cd\u5230\u5e94\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u54cd\u5e94\u65f6\u95f4\u3002<\/p>\n\n\n\n

      2.<\/strong>\u4e3a\u4ec0\u4e48\u76d1\u63a7JVM ygc\u7684\u5065\u5eb7\u72b6\u6001\u662f\u5fc5\u8981\u7684\uff1f<\/strong><\/p>\n\n\n\n

      \u76d1\u63a7 ygc \u7684\u5065\u5eb7\u72b6\u6001\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u786e\u4fdd\u5e94\u7528\u7a0b\u5e8f\u8fd0\u884c\u7684\u7a33\u5b9a\u6027\u548c\u6548\u7387\u3002\u8fc7\u591a\u7684ygc\u4e8b\u4ef6\uff0c\u6216\u8005\u5355\u4e2aygc\u4e8b\u4ef6\u7684\u8fc7\u957f\u65f6\u95f4\uff0c\u90fd\u53ef\u80fd\u5bfc\u81f4\u5e94\u7528\u51fa\u73b0\u6027\u80fd\u95ee\u9898\uff0c\u4f8b\u5982\u54cd\u5e94\u5ef6\u8fdf\u6216\u8d85\u65f6\u3002\u901a\u8fc7\u76d1\u63a7ygc\u7684\u5065\u5eb7\u72b6\u6001\uff0c\u6211\u4eec\u80fd\u5728\u95ee\u9898\u53d8\u5f97\u4e25\u91cd\u524d\u53ca\u65f6\u53d1\u73b0\u5e76\u8c03\u4f18JVM\u53c2\u6570\u6216\u4f18\u5316\u4ee3\u7801\uff0c\u4fdd\u8bc1\u5e94\u7528\u7684\u5065\u5eb7\u8fd0\u884c\u3002<\/p>\n\n\n\n

      3.<\/strong>\u5982\u4f55\u76d1\u63a7JVM ygc\u7684\u5065\u5eb7\u72b6\u6001\uff1f<\/strong><\/p>\n\n\n\n

      \u76d1\u63a7 JVM ygc \u7684\u5065\u5eb7\u72b6\u6001\u901a\u5e38\u53ef\u4ee5\u901a\u8fc7JVM\u63d0\u4f9b\u7684JMX\uff08Java Management Extensions\uff09\u6280\u672f\u6765\u5b9e\u73b0\u3002\u901a\u8fc7 JMX\uff0c\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u5404\u79cd\u76d1\u63a7\u5de5\u5177\u6216\u5e73\u53f0\uff08\u5982 JConsole, VisualVM, Grafana \u7b49\uff09\u6765\u5b9e\u65f6\u76d1\u63a7\u548c\u83b7\u53d6 JVM ygc \u7684\u6570\u636e\uff0c\u5982 ygc \u53d1\u751f\u7684\u9891\u7387\u3001\u6bcf\u6b21 ygc \u6301\u7eed\u7684\u65f6\u95f4\u3001\u5728 ygc \u540e\u91ca\u653e\u7684\u5185\u5b58\u91cf\u7b49\u3002<\/p>\n\n\n\n

      4.<\/strong>\u6211\u4eec\u53ef\u4ee5\u4ece\u54ea\u4e9b\u65b9\u9762\u5bf9JVM ygc\u7684\u5065\u5eb7\u72b6\u6001\u8fdb\u884c\u4f18\u5316\uff1f<\/strong><\/p>\n\n\n\n

      JVM ygc\u7684\u4f18\u5316\u901a\u5e38\u5305\u62ec\u8c03\u6574\u5806\u5927\u5c0f\uff08-Xms \u548c -Xmx \u53c2\u6570\uff09\u3001\u8c03\u6574\u5e74\u8f7b\u4ee3\u5927\u5c0f\u3001\u9009\u62e9\u5408\u9002\u7684\u5783\u573e\u6536\u96c6\u5668\uff08\u5982 G1\u3001Parallel GC \u7b49\uff09\u3001\u4ee5\u53ca\u4f18\u5316\u4ee3\u7801\uff08\u6bd4\u5982\u51cf\u5c11\u77ed\u65f6\u95f4\u5185\u5927\u91cf\u5bf9\u8c61\u7684\u521b\u5efa\u548c\u9500\u6bc1\uff09\u3002\u6b64\u5916\uff0c\u5bf9\u4e8e\u6301\u4e45\u5316\u7684\u3001\u5927\u5bf9\u8c61\uff0c\u6216\u662f\u7f13\u5b58\uff0c\u8003\u8651\u4f7f\u7528WeakReference\u6216SoftReference\u4ee5\u51cf\u8f7bGC\u7684\u538b\u529b\u4e5f\u662f\u4e00\u4e2a\u5e38\u89c1\u7684\u4f18\u5316\u7b56\u7565\u3002<\/p>\n\n\n\n

      5.JVM<\/strong>\u7684\u5783\u573e\u6536\u96c6\u4e0e\u5e94\u7528\u7a0b\u5e8f\u6027\u80fd\u7684\u5173\u7cfb\u662f\u4ec0\u4e48\uff1f<\/strong><\/p>\n\n\n\n

      JVM\u7684\u5783\u573e\u6536\u96c6\u4e3b\u8981\u5f71\u54cd\u5e94\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u8868\u73b0\u5728\u4e24\u4e2a\u65b9\u9762\uff1a\u541e\u5410\u91cf\u548c\u5ef6\u8fdf\u3002\u8fc7\u591a\u6216\u8fc7\u957f\u7684 ygc \u4e8b\u4ef6\u53ef\u80fd\u964d\u4f4e\u7cfb\u7edf\u7684\u541e\u5410\u91cf\u5e76\u589e\u52a0\u54cd\u5e94\u5ef6\u8fdf\uff0c\u8fdb\u800c\u5f71\u54cd\u7528\u6237\u4f53\u9a8c\u548c\u7cfb\u7edf\u7684\u7a33\u5b9a\u6027\u3002\u6b63\u786e\u914d\u7f6e\u548c\u4f18\u5316 JVM \u7684\u5783\u573e\u6536\u96c6\u53ef\u4ee5\u6700\u5927\u9650\u5ea6\u5730\u51cf\u5c11GC\u5bf9\u5e94\u7528\u6027\u80fd\u7684\u5f71\u54cd\uff0c\u4fdd\u6301\u7cfb\u7edf\u8fd0\u884c\u7684\u5e73\u7a33\u548c\u9ad8\u6548\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"JVM\uff08Java\u865a\u62df\u673a\uff09\u7684\u5783\u573e\u56de\u6536\uff08GC\uff09\u8fc7\u7a0b\u5bf9Java\u5e94\u7528\u7684\u6027\u80fd\u4ea7\u751f\u6df1\u8fdc\u5f71\u54cd\u3002\u5c24\u5176\u662f\u5e74\u8f7b\u4ee3\u5783\u573e\u56de\u6536\uff08YGC\uff09 […]","protected":false},"author":5,"featured_media":56688,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/56710"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=56710"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/56710\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/56688"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=56710"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=56710"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=56710"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}