{"id":664,"date":"2023-10-08T05:20:22","date_gmt":"2022-09-09T09:12:30","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/java%e4%b8%ad%e7%9a%84%e5%9e%83%e5%9c%be%e5%9b%9e%e6%94%b6\/"},"modified":"2025-08-03T01:53:06","modified_gmt":"2025-08-02T17:53:06","slug":"java%e4%b8%ad%e7%9a%84%e5%9e%83%e5%9c%be%e5%9b%9e%e6%94%b6","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java%e4%b8%ad%e7%9a%84%e5%9e%83%e5%9c%be%e5%9b%9e%e6%94%b6\/","title":{"rendered":"Java\u5783\u573e\u56de\u6536\u673a\u5236\u8be6\u89e3\uff1a\u539f\u7406\u4e0e\u8c03\u4f18\u5b9e\u6218"},"content":{"rendered":"<p>Java\u5783\u573e\u56de\u6536\u662f\u4e00\u4e2a\u9ad8\u7ea7\u4e3b\u9898\u4e4b\u4e00\u3002Java GC\u77e5\u8bc6\u6709\u52a9\u4e8e\u6211\u4eec\u5728\u4f18\u5316\u5e94\u7528\u7a0b\u5e8f\u7684\u8fd0\u884c\u65f6\u6027\u80fd\u65b9\u9762\u8fdb\u884c\u5fae\u8c03\u3002<\/p>\n<h2>Java\u4e2d\u7684\u5783\u573e\u56de\u6536<\/h2>\n<ul 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GC\u7684\u64cd\u4f5c\uff0c\u5b83\u6e05\u7406\u6574\u4e2a\u5806\uff0c\u5305\u62ec\u5e74\u8f7b\u4ee3\u548c\u8001\u5e74\u4ee3\u7684\u7a7a\u95f4\u3002\u6700\u540e\uff0c\u5728Java 7\u4e4b\u524d\uff0c\u8fd8\u5b58\u5728\u4e00\u79cd\u79f0\u4e3a\u6c38\u4e45\u4ee3\uff08\u6216Perm Gen\uff09\u7684\u7a7a\u95f4\uff0c\u5176\u4e2d\u5305\u542bJVM\u9700\u8981\u63cf\u8ff0\u5e94\u7528\u7a0b\u5e8f\u4e2d\u4f7f\u7528\u7684\u7c7b\u548c\u65b9\u6cd5\u7684\u5143\u6570\u636e\u3002\u5b83\u5728Java 8\u4e2d\u88ab\u79fb\u9664\u3002<\/p>\n<h3>Java 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JVM\u9009\u9879\u6765\u542f\u7528\u3002<\/p>\n<h3>\u5e76\u884c\/\u541e\u5410\u91cf\u5783\u573e\u56de\u6536<\/h3>\n<p>\u8fd9\u662fJDK 8\u4e2dJVM\u7684\u9ed8\u8ba4\u6536\u96c6\u5668\u3002\u987e\u540d\u601d\u4e49\uff0c\u5b83\u4f7f\u7528\u591a\u7ebf\u7a0b\u6765\u626b\u63cf\u5806\u7a7a\u95f4\u5e76\u8fdb\u884c\u6574\u7406\u3002\u8fd9\u4e2a\u6536\u96c6\u5668\u7684\u7f3a\u70b9\u662f\u5728\u6267\u884c\u90e8\u5206\u6216\u5b8c\u6574\u7684GC\u65f6\u4f1a\u6682\u505c\u5e94\u7528\u7a0b\u5e8f\u7ebf\u7a0b\u3002\u5b83\u6700\u9002\u5408\u80fd\u591f\u5904\u7406\u6b64\u7c7b\u6682\u505c\u5e76\u5c1d\u8bd5\u4f18\u5316\u6536\u96c6\u5668\u5f15\u8d77\u7684CPU\u5f00\u9500\u7684\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n<h3>CMS\u6536\u96c6\u5668<\/h3>\n<p>CMS\u6536\u96c6\u5668\uff08&#8221;concurrent-mark-sweep&#8221;\uff09\u7b97\u6cd5\u4f7f\u7528\u591a\u4e2a\u7ebf\u7a0b\uff08&#8221;concurrent&#8221;\uff09\u626b\u63cf\u5806\uff08&#8221;mark&#8221;\uff09\u4e2d\u672a\u4f7f\u7528\u7684\u53ef\u4ee5\u56de\u6536\u7684\u5bf9\u8c61\uff08&#8221;sweep&#8221;\uff09\u3002\u8be5\u6536\u96c6\u5668\u5728\u4e24\u79cd\u60c5\u51b5\u4e0b\u8fdb\u5165Stop-The-World\uff08STW\uff09\u6a21\u5f0f\uff1a- \u521d\u59cb\u5316\u6839\u5bf9\u8c61\u7684\u8d77\u59cb\u6807\u8bb0\u65f6\uff0c\u5373\u4ece\u7ebf\u7a0b\u5165\u53e3\u70b9\u6216\u9759\u6001\u53d8\u91cf\u53ef\u8fbe\u7684\u65e7\u4e00\u4ee3\u5bf9\u8c61- 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decoding=\"async\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/65647da0a4b2f92e6c72d1da\/14-0.png\" class=\"post-images\" alt=\"Java\u4e2d\u7684\u5783\u573e\u56de\u6536\uff0cJava GC\" title=\"Java\u4e2d\u7684\u5783\u573e\u56de\u6536\"><\/div>\n<ol>\n<li><strong>\u5e74\u8f7b\u4ee3\u4e13\u7528\u9636\u6bb5\uff1a<\/strong>\u6b64\u9636\u6bb5\u4ec5\u5305\u62ec\u5e74\u8f7b\u4e00\u4ee3\u7684\u5bf9\u8c61\uff0c\u5e76\u5c06\u5b83\u4eec\u664b\u5347\u5230\u8001\u4e00\u4ee3\u3002\u5e74\u8f7b\u4ee3\u4e13\u7528\u9636\u6bb5\u4e0e\u7a7a\u95f4\u56de\u6536\u9636\u6bb5\u4e4b\u95f4\u7684\u8fc7\u6e21\u662f\u5728\u8001\u4e00\u4ee3\u8fbe\u5230\u4e00\u5b9a\u7684\u9608\u503c\uff08\u5373\u521d\u59cb\u5806\u5360\u7528\u9608\u503c\uff09\u65f6\u5f00\u59cb\u7684\u3002\u6b64\u65f6\uff0cG1\u4f1a\u5b89\u6392\u4e00\u6b21\u521d\u59cb\u6807\u8bb0\u7684\u5e74\u8f7b\u4ee3\u4e13\u7528\u56de\u6536\uff0c\u800c\u4e0d\u662f\u5e38\u89c4\u7684\u5e74\u8f7b\u4ee3\u4e13\u7528\u56de\u6536\u3002<\/li>\n<li><strong>\u521d\u59cb\u6807\u8bb0\uff1a<\/strong>\u8fd9\u79cd\u7c7b\u578b\u7684\u56de\u6536\u4f1a\u5728\u5e38\u89c4\u7684\u5e74\u8f7b\u4ee3\u4e13\u7528\u56de\u6536\u4e4b\u5916\u542f\u52a8\u6807\u8bb0\u8fc7\u7a0b\u3002\u5e76\u53d1\u6807\u8bb0\u786e\u5b9a\u8001\u4e00\u4ee3\u533a\u57df\u4e2d\u7684\u6240\u6709\u5f53\u524d\u5b58\u6d3b\u5bf9\u8c61\uff0c\u4ee5\u4fbf\u5728\u63a5\u4e0b\u6765\u7684\u7a7a\u95f4\u56de\u6536\u9636\u6bb5\u4fdd\u7559\u8fd9\u4e9b\u5bf9\u8c61\u3002\u5728\u6807\u8bb0\u5c1a\u672a\u5b8c\u5168\u7ed3\u675f\u65f6\uff0c\u53ef\u80fd\u4f1a\u8fdb\u884c\u5e38\u89c4\u7684\u5e74\u8f7b\u4ee3\u4e13\u7528\u56de\u6536\u3002\u6807\u8bb0\u5b8c\u6210\u540e\u4f1a\u6709\u4e24\u6b21\u7279\u6b8a\u7684\u505c\u987f\uff1a\u6807\u8bb0\u6682\u505c\u548c\u6e05\u7406\u6682\u505c\u3002<\/li>\n<li><strong>\u6807\u8bb0\u6682\u505c\uff1a<\/strong>\u6b64\u6682\u505c\u6700\u7ec8\u5b8c\u6210\u6807\u8bb0\u672c\u8eab\uff0c\u5e76\u6267\u884c\u5168\u5c40\u5f15\u7528\u5904\u7406\u548c\u7c7b\u5378\u8f7d\u3002\u5728\u6807\u8bb0\u6682\u505c\u548c\u6e05\u7406\u6682\u505c\u4e4b\u95f4\uff0cG1\u4f1a\u5e76\u53d1\u8ba1\u7b97\u6d3b\u8dc3\u4fe1\u606f\u7684\u6458\u8981\uff0c\u5e76\u5728\u6e05\u7406\u6682\u505c\u65f6\u6700\u7ec8\u786e\u5b9a\u5e76\u7528\u4e8e\u66f4\u65b0\u5185\u90e8\u6570\u636e\u7ed3\u6784\u3002<\/li>\n<li><strong>\u6e05\u7406\u6682\u505c\uff1a<\/strong>\u6b64\u6682\u505c\u8fd8\u4f1a\u5904\u7406\u5b8c\u5168\u7a7a\u7684\u533a\u57df\uff0c\u5e76\u786e\u5b9a\u662f\u5426\u771f\u7684\u9700\u8981\u8fdb\u884c\u7a7a\u95f4\u56de\u6536\u9636\u6bb5\u3002\u5982\u679c\u6709\u7a7a\u95f4\u56de\u6536\u9636\u6bb5\uff0c\u5e74\u8f7b\u4ee3\u4e13\u7528\u9636\u6bb5\u5c06\u4ee5\u4e00\u6b21\u5e74\u8f7b\u4ee3\u4e13\u7528\u56de\u6536\u5b8c\u6210\u3002<\/li>\n<li><strong>\u7a7a\u95f4\u56de\u6536\u9636\u6bb5\uff1a<\/strong>\u6b64\u9636\u6bb5\u5305\u62ec\u591a\u6b21\u6df7\u5408\u56de\u6536-\u9664\u4e86\u56de\u6536\u5e74\u8f7b\u4ee3\u533a\u57df\u5916\uff0c\u8fd8\u4f1a\u758f\u6563\u8001\u4e00\u4ee3\u533a\u57df\u7684\u5b58\u6d3b\u5bf9\u8c61\u3002\u7a7a\u95f4\u56de\u6536\u9636\u6bb5\u5728G1\u786e\u5b9a\u758f\u6563\u66f4\u591a\u8001\u4e00\u4ee3\u533a\u57df\u4e0d\u518d\u503c\u5f97\u7684\u60c5\u51b5\u4e0b\u7ed3\u675f\u3002<\/li>\n<\/ol>\n<p>\u53ef\u4ee5\u4f7f\u7528-XX:+UseG1GC\u6807\u5fd7\u6765\u542f\u7528G1\u5783\u573e\u6536\u96c6\u5668\u3002\u8fd9\u79cd\u7b56\u7565\u51cf\u5c11\u4e86\u5728\u540e\u53f0\u7ebf\u7a0b\u5b8c\u6210\u5bf9\u65e0\u6cd5\u8bbf\u95ee\u7684\u5bf9\u8c61\u8fdb\u884c\u626b\u63cf\u4e4b\u524d\u5806\u88ab\u8017\u5c3d\u7684\u673a\u4f1a\u3002\u6b64\u5916\uff0c\u5b83\u8fd8\u53ef\u4ee5\u5728\u8fd0\u884c\u65f6\u538b\u7f29\u5806\uff0c\u800cCMS\u6536\u96c6\u5668\u53ea\u80fd\u5728\u53d1\u751fSTW\u6a21\u5f0f\u65f6\u8fdb\u884c\u538b\u7f29\u3002\u5728Java 8\u4e2d\uff0c\u901a\u8fc7G1\u6536\u96c6\u5668\u63d0\u4f9b\u4e86\u4e00\u79cd\u540d\u4e3a\u5b57\u7b26\u4e32\u53bb\u91cd\u7684\u51fa\u8272\u4f18\u5316\u3002\u6211\u4eec\u77e5\u9053\uff0c\u8868\u793a\u5b57\u7b26\u4e32\u7684\u5b57\u7b26\u6570\u7ec4\u5360\u7528\u4e86\u5927\u91cf\u7684\u5806\u7a7a\u95f4\u3002\u73b0\u5728\uff0c\u5f15\u5165\u4e86\u4e00\u79cd\u65b0\u7684\u4f18\u5316\uff0c\u4f7fG1\u6536\u96c6\u5668\u80fd\u591f\u8bc6\u522b\u5806\u4e2d\u591a\u6b21\u91cd\u590d\u51fa\u73b0\u7684\u5b57\u7b26\u4e32\uff0c\u5e76\u5c06\u5b83\u4eec\u4fee\u6539\u4e3a\u6307\u5411\u540c\u4e00\u4e2a\u5185\u90e8char[]\u6570\u7ec4\uff0c\u4ee5\u907f\u514d\u4e0d\u5fc5\u8981\u5730\u5728\u5806\u4e2d\u5b58\u5728\u591a\u4e2a\u76f8\u540c\u7684\u5b57\u7b26\u4e32\u526f\u672c\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528-XX:+UseStringDeduplication JVM\u53c2\u6570\u6765\u542f\u7528\u6b64\u4f18\u5316\u3002\u5728JDK 9\u4e2d\uff0c\u9ed8\u8ba4\u7684\u5783\u573e\u6536\u96c6\u5668\u662fG1\u3002<\/p>\n<h3>Java 8 \u7684\u6c38\u4e45\u4ee3\uff08PermGen\uff09\u548c\u5143\u7a7a\u95f4\uff08Metaspace\uff09\u3002<\/h3>\n<p>\u5982\u524d\u6240\u8ff0\uff0c\u81eaJava 8\u5f00\u59cb\uff0c\u6c38\u4e45\u4ee3\u7a7a\u95f4\u5df2\u88ab\u79fb\u9664\u3002\u56e0\u6b64\uff0cJDK 8 HotSpot JVM\u73b0\u5728\u4f7f\u7528\u672c\u673a\u5185\u5b58\u6765\u8868\u793a\u7c7b\u7684\u5143\u6570\u636e\uff0c\u8fd9\u88ab\u79f0\u4e3aMetaspace\u3002\u5927\u90e8\u5206\u7c7b\u5143\u6570\u636e\u7684\u5206\u914d\u90fd\u662f\u5728\u672c\u673a\u5185\u5b58\u4e2d\u8fdb\u884c\u7684\u3002\u6b64\u5916\uff0c\u8fd8\u6709\u4e00\u4e2a\u65b0\u7684\u6807\u5fd7MaxMetaspaceSize\uff0c\u7528\u4e8e\u9650\u5236\u7528\u4e8e\u7c7b\u5143\u6570\u636e\u7684\u5185\u5b58\u91cf\u3002\u5982\u679c\u6211\u4eec\u6ca1\u6709\u4e3a\u6b64\u6307\u5b9a\u503c\uff0cMetaspace\u5c06\u6839\u636e\u8fd0\u884c\u5e94\u7528\u7a0b\u5e8f\u7684\u9700\u6c42\u5728\u8fd0\u884c\u65f6\u91cd\u65b0\u8c03\u6574\u5927\u5c0f\u3002\u5f53\u7c7b\u5143\u6570\u636e\u4f7f\u7528\u8fbe\u5230MaxMetaspaceSize\u9650\u5236\u65f6\uff0c\u4f1a\u89e6\u53d1Metaspace\u5783\u573e\u6536\u96c6\u3002\u8fc7\u591a\u7684Metaspace\u5783\u573e\u6536\u96c6\u53ef\u80fd\u662f\u7c7b\u3001\u7c7b\u52a0\u8f7d\u5668\u5185\u5b58\u6cc4\u6f0f\u6216\u5e94\u7528\u7a0b\u5e8f\u5927\u5c0f\u4e0d\u8db3\u7684\u75c7\u72b6\u3002\u5173\u4e8ejava\u4e2d\u7684\u5783\u573e\u6536\u96c6\uff0c\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u3002\u5e0c\u671b\u4f60\u5bf9\u6211\u4eec\u5728java\u4e2d\u62e5\u6709\u7684\u4e0d\u540c\u5783\u573e\u6536\u96c6\u5668\u6709\u6240\u4e86\u89e3\u3002\u53c2\u8003\u8d44\u6599\uff1aOracle\u6587\u6863\uff0cG1 GC\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u5783\u573e\u56de\u6536\u662f\u4e00\u4e2a\u9ad8\u7ea7\u4e3b\u9898\u4e4b\u4e00\u3002Java GC\u77e5\u8bc6\u6709\u52a9\u4e8e\u6211\u4eec\u5728\u4f18\u5316\u5e94\u7528\u7a0b\u5e8f\u7684\u8fd0\u884c\u65f6\u6027\u80fd\u65b9\u9762\u8fdb\u884c\u5fae\u8c03\u3002 Ja [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[1852,1850,1042,1851,203],"class_list":["post-664","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-gc","tag-java","tag-jvm","tag-1851","tag-203"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java\u5783\u573e\u56de\u6536\u673a\u5236\u8be6\u89e3\uff1a\u539f\u7406\u4e0e\u8c03\u4f18\u5b9e\u6218 - Blog - 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