{"id":37529,"date":"2023-12-11T14:41:47","date_gmt":"2023-12-11T06:41:47","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=37529"},"modified":"2023-12-11T14:41:47","modified_gmt":"2023-12-11T06:41:47","slug":"%e5%b8%b8%e7%94%a8-gc-%e8%b0%83%e4%bc%98%e7%ad%96%e7%95%a5%e6%9c%89%e5%93%aa%e4%ba%9b%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/11\/%e5%b8%b8%e7%94%a8-gc-%e8%b0%83%e4%bc%98%e7%ad%96%e7%95%a5%e6%9c%89%e5%93%aa%e4%ba%9b%ef%bc%9f\/","title":{"rendered":"\u5e38\u7528 GC \u8c03\u4f18\u7b56\u7565\u6709\u54ea\u4e9b\uff1f"},"content":{"rendered":"

“`”<\/p>\n

<ol><li>GC \u8c03\u4f18\u539f\u5219\uff1b<\/li><li>GC \u8c03\u4f18\u76ee\u7684\uff1b<\/li><li>GC \u8c03\u4f18\u7b56\u7565\uff1b<\/li><\/ol><\/p>\n

<h3>GC \u8c03\u4f18\u539f\u5219<\/h3><\/p>\n

\u5728\u8c03\u4f18\u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u8bb0\u4f4f\u4e0b\u9762\u7684\u539f\u5219\uff1a<\/p><\/p>\n

<blockquote>\u591a\u6570\u7684 Java \u5e94\u7528\u4e0d\u9700\u8981\u5728\u670d\u52a1\u5668\u4e0a\u8fdb\u884c GC \u4f18\u5316\uff1b \u591a\u6570\u5bfc\u81f4 GC \u95ee\u9898\u7684 Java \u5e94\u7528\uff0c\u90fd\u4e0d\u662f\u56e0\u4e3a\u6211\u4eec\u53c2\u6570\u8bbe\u7f6e\u9519\u8bef\uff0c\u800c\u662f\u4ee3\u7801\u95ee\u9898\uff1b \u5728\u5e94\u7528\u4e0a\u7ebf\u4e4b\u524d\uff0c\u5148\u8003\u8651\u5c06\u673a\u5668\u7684 JVM \u53c2\u6570\u8bbe\u7f6e\u5230\u6700\u4f18\uff08\u6700\u9002\u5408\uff09\uff1b \u51cf\u5c11\u521b\u5efa\u5bf9\u8c61\u7684\u6570\u91cf\uff1b \u51cf\u5c11\u4f7f\u7528\u5168\u5c40\u53d8\u91cf\u548c\u5927\u5bf9\u8c61\uff1b GC \u4f18\u5316\u662f\u5230\u6700\u540e\u4e0d\u5f97\u5df2\u624d\u91c7\u7528\u7684\u624b\u6bb5\uff1b \u5728\u5b9e\u9645\u4f7f\u7528\u4e2d\uff0c\u5206\u6790 GC \u60c5\u51b5\u4f18\u5316\u4ee3\u7801\u6bd4\u4f18\u5316 GC \u53c2\u6570\u8981\u591a\u5f97\u591a\u3002<\/p><\/blockquote><\/p>\n

<h3>GC \u8c03\u4f18\u76ee\u7684<\/h3><\/p>\n

<p>\u5c06\u8f6c\u79fb\u5230\u8001\u5e74\u4ee3\u7684\u5bf9\u8c61\u6570\u91cf\u964d\u4f4e\u5230\u6700\u5c0f\uff1b \u51cf\u5c11 GC \u7684\u6267\u884c\u65f6\u95f4\u3002<\/p>\n

<h3>GC \u8c03\u4f18\u7b56\u7565<\/h3><\/p>\n

<strong>\u7b56\u7565 1\uff1a<\/strong>\u5c06\u65b0\u5bf9\u8c61\u9884\u7559\u5728\u65b0\u751f\u4ee3\uff0c\u7531\u4e8e Full GC \u7684\u6210\u672c\u8fdc\u9ad8\u4e8e Minor GC\uff0c\u56e0\u6b64\u5c3d\u53ef\u80fd\u5c06\u5bf9\u8c61\u5206\u914d\u5728\u65b0\u751f\u4ee3\u662f\u660e\u667a\u7684\u505a\u6cd5\uff0c\u5b9e\u9645\u9879\u76ee\u4e2d\u6839\u636e GC \u65e5\u5fd7\u5206\u6790\u65b0\u751f\u4ee3\u7a7a\u95f4\u5927\u5c0f\u5206\u914d\u662f\u5426\u5408\u7406\uff0c\u9002\u5f53\u901a\u8fc7\u201c-Xmn\u201d\u547d\u4ee4\u8c03\u8282\u65b0\u751f\u4ee3\u5927\u5c0f\uff0c\u6700\u5927\u9650\u5ea6\u964d\u4f4e\u65b0\u5bf9\u8c61\u76f4\u63a5\u8fdb\u5165\u8001\u5e74\u4ee3\u7684\u60c5\u51b5\u3002<\/p>\n

<strong>\u7b56\u7565 2\uff1a<\/strong>\u5927\u5bf9\u8c61\u8fdb\u5165\u8001\u5e74\u4ee3\uff0c\u867d\u7136\u5927\u90e8\u5206\u60c5\u51b5\u4e0b\uff0c\u5c06\u5bf9\u8c61\u5206\u914d\u5728\u65b0\u751f\u4ee3\u662f\u5408\u7406\u7684\u3002\u4f46\u662f\u5bf9\u4e8e\u5927\u5bf9\u8c61\u8fd9\u79cd\u505a\u6cd5\u5374\u503c\u5f97\u5546\u69b7\uff0c\u5927\u5bf9\u8c61\u5982\u679c\u9996\u6b21\u5728\u65b0\u751f\u4ee3\u5206\u914d\u53ef\u80fd\u4f1a\u51fa\u73b0\u7a7a\u95f4\u4e0d\u8db3\u5bfc\u81f4\u5f88\u591a\u5e74\u9f84\u4e0d\u591f\u7684\u5c0f\u5bf9\u8c61\u88ab\u5206\u914d\u7684\u8001\u5e74\u4ee3\uff0c\u7834\u574f\u65b0\u751f\u4ee3\u7684\u5bf9\u8c61\u7ed3\u6784\uff0c\u53ef\u80fd\u4f1a\u51fa\u73b0\u9891\u7e41\u7684 full gc\u3002\u56e0\u6b64\uff0c\u5bf9\u4e8e\u5927\u5bf9\u8c61\uff0c\u53ef\u4ee5\u8bbe\u7f6e\u76f4\u63a5\u8fdb\u5165\u8001\u5e74\u4ee3\uff08\u5f53\u7136\u77ed\u547d\u7684\u5927\u5bf9\u8c61\u5bf9\u4e8e\u5783\u573e\u56de\u6536\u6765\u8bf4\u7b80\u76f4\u5c31\u662f\u5669\u68a6\uff09\u3002<code><span style=""font-family:"Open Sans", "Clear Sans", "Helvetica Neue", Helvetica, Arial, sans-serif"">-<\/span>XX:PretenureSizeThreshold<\/code> \u53ef\u4ee5\u8bbe\u7f6e\u76f4\u63a5\u8fdb\u5165\u8001\u5e74\u4ee3\u7684\u5bf9\u8c61\u5927\u5c0f\u3002<\/p>\n

<strong>\u7b56\u7565 3\uff1a<\/strong>\u5408\u7406\u8bbe\u7f6e\u8fdb\u5165\u8001\u5e74\u4ee3\u5bf9\u8c61\u7684\u5e74\u9f84\uff0c<code><span style=""font-family:"Open Sans", "Clear Sans", "Helvetica Neue", Helvetica, Arial, sans-serif"">-<\/span>XX:MaxTenuringThreshold<\/code> \u8bbe\u7f6e\u5bf9\u8c61\u8fdb\u5165\u8001\u5e74\u4ee3\u7684\u5e74\u9f84\u5927\u5c0f\uff0c\u51cf\u5c11\u8001\u5e74\u4ee3\u7684\u5185\u5b58\u5360\u7528\uff0c\u964d\u4f4e full gc \u53d1\u751f\u7684\u9891\u7387\u3002<\/p>\n

<strong>\u7b56\u7565 4\uff1a<\/strong>\u8bbe\u7f6e\u7a33\u5b9a\u7684\u5806\u5927\u5c0f\uff0c\u5806\u5927\u5c0f\u8bbe\u7f6e\u6709\u4e24\u4e2a\u53c2\u6570\uff1a<code><span style=""font-family:"Open Sans", "Clear Sans", "Helvetica Neue", Helvetica, Arial, sans-serif"">-<\/span>Xms<\/code> \u521d\u59cb\u5316\u5806\u5927\u5c0f\uff0c<code><span style=""font-family:"Open Sans", "Clear Sans", "Helvetica Neue", Helvetica, Arial, sans-serif"">-<\/span>Xmx<\/code> \u6700\u5927\u5806\u5927\u5c0f\u3002<\/p>\n

<strong>\u7b56\u75655\uff1a<\/strong>\u6ce8\u610f\uff1a \u5982\u679c\u6ee1\u8db3\u4e0b\u9762\u7684\u6307\u6807\uff0c<strong>\u5219\u4e00\u822c\u4e0d\u9700\u8981\u8fdb\u884c GC \u4f18\u5316\uff1a<\/strong><\/p>\n

<blockquote><p>MinorGC \u6267\u884c\u65f6\u95f4\u4e0d\u523050ms\uff1b Minor GC \u6267\u884c\u4e0d\u9891\u7e41\uff0c\u7ea610\u79d2\u4e00\u6b21\uff1b Full GC \u6267\u884c\u65f6\u95f4\u4e0d\u52301s\uff1b Full GC \u6267\u884c\u9891\u7387\u4e0d\u7b97\u9891\u7e41\uff0c\u4e0d\u4f4e\u4e8e10\u5206\u949f1\u6b21\u3002<\/p><\/blockquote><\/p>\n

<pre><code> "“`
\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"

“`” <ol><li>GC \u8c03\u4f18\u539f\u5219\uff1b<\/li> […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-37529","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/37529","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=37529"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/37529\/revisions"}],"predecessor-version":[{"id":37530,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/37529\/revisions\/37530"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=37529"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=37529"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=37529"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}