{"id":191630,"date":"2024-11-12T17:01:21","date_gmt":"2024-11-12T09:01:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/191630\/"},"modified":"2024-11-12T17:01:23","modified_gmt":"2024-11-12T09:01:23","slug":"%e8%a9%b3%e8%a7%a3postgresql%e4%b8%ad%e7%9a%84checkpoint%e6%a6%82%e5%bf%b5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/191630\/","title":{"rendered":"\u8a73\u89e3PostgreSQL\u4e2d\u7684checkpoint\u6982\u5ff5"},"content":{"rendered":"<h1 id=\"%e8%a9%b3%e8%a7%a3postgresql%e4%b8%ad%e7%9a%84checkpoint%e6%a6%82%e5%bf%b5-gfBbNlRCmw\">\u8a73\u89e3PostgreSQL\u4e2d\u7684checkpoint\u6982\u5ff5<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u8cc7\u6599\u7684\u5b8c\u6574\u6027\u548c\u53ef\u7528\u6027\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002PostgreSQL\u4f5c\u70ba\u4e00\u500b\u5f37\u5927\u7684\u958b\u6e90\u95dc\u806f\u8cc7\u6599\u5eab\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u6a5f\u5236\u4f86\u78ba\u4fdd\u8cc7\u6599\u7684\u5b89\u5168\u6027\u548c\u4e00\u81f4\u6027\u3002\u5176\u4e2d\uff0ccheckpoint\u662f\u4e00\u500b\u95dc\u9375\u7684\u6982\u5ff5\uff0c\u5c0d\u65bc\u8cc7\u6599\u5eab\u7684\u6027\u80fd\u548c\u6062\u5fa9\u80fd\u529b\u6709\u8457\u91cd\u8981\u7684\u5f71\u97ff\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afcheckpoint%ef%bc%9f-gfBbNlRCmw\">\u4ec0\u9ebc\u662fCheckpoint\uff1f<\/h2>\n<p>Checkpoint\u662fPostgreSQL\u4e2d\u4e00\u500b\u91cd\u8981\u7684\u6a5f\u5236\uff0c\u7528\u65bc\u5c07\u8cc7\u6599\u5eab\u7684\u5167\u5b58\u4e2d\u7684\u8b8a\u66f4\u5beb\u5165\u5230\u78c1\u789f\u4e2d\u3002\u7576\u8cc7\u6599\u5eab\u904b\u884c\u6642\uff0c\u6240\u6709\u7684\u5beb\u5165\u64cd\u4f5c\u9996\u5148\u6703\u5728\u5167\u5b58\u4e2d\u9032\u884c\uff0c\u9019\u6a23\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002\u7136\u800c\uff0c\u9019\u4e5f\u610f\u5473\u8457\u5982\u679c\u7cfb\u7d71\u5d29\u6f70\uff0c\u9019\u4e9b\u8b8a\u66f4\u53ef\u80fd\u6703\u4e1f\u5931\u3002\u70ba\u4e86\u9632\u6b62\u9019\u7a2e\u60c5\u6cc1\uff0cPostgreSQL\u5b9a\u671f\u57f7\u884ccheckpoint\uff0c\u5c07\u5167\u5b58\u4e2d\u7684\u8cc7\u6599\u6301\u4e45\u5316\u5230\u78c1\u789f\u3002<\/p>\n<h2 id=\"checkpoint%e7%9a%84%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86-gfBbNlRCmw\">Checkpoint\u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n<p>\u5728PostgreSQL\u4e2d\uff0ccheckpoint\u7684\u904e\u7a0b\u4e3b\u8981\u5305\u62ec\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<ul>\n<li><strong>\u8a18\u9304\u7576\u524d\u72c0\u614b\uff1a<\/strong>\u5728\u57f7\u884ccheckpoint\u4e4b\u524d\uff0cPostgreSQL\u6703\u8a18\u9304\u7576\u524d\u7684\u8cc7\u6599\u5eab\u72c0\u614b\uff0c\u5305\u62ec\u6240\u6709\u7684WAL\uff08Write-Ahead Logging\uff09\u65e5\u8a8c\u3002<\/li>\n<li><strong>\u5beb\u5165\u8cc7\u6599\uff1a<\/strong>\u5c07\u6240\u6709\u5728\u5167\u5b58\u4e2d\u4fee\u6539\u7684\u8cc7\u6599\u9801\u9762\u5beb\u5165\u5230\u78c1\u789f\u4e2d\uff0c\u78ba\u4fdd\u9019\u4e9b\u8b8a\u66f4\u88ab\u6301\u4e45\u5316\u3002<\/li>\n<li><strong>\u66f4\u65b0\u63a7\u5236\u6a94\uff1a<\/strong>\u66f4\u65b0\u8cc7\u6599\u5eab\u7684\u63a7\u5236\u6a94\uff0c\u4ee5\u53cd\u6620\u6700\u65b0\u7684checkpoint\u72c0\u614b\u3002<\/li>\n<li><strong>\u6e05\u7406WAL\u65e5\u8a8c\uff1a<\/strong>\u5728checkpoint\u5b8c\u6210\u5f8c\uff0cPostgreSQL\u53ef\u4ee5\u5b89\u5168\u5730\u6e05\u7406\u820a\u7684WAL\u65e5\u8a8c\uff0c\u91cb\u653e\u78c1\u789f\u7a7a\u9593\u3002<\/li>\n<\/ul>\n<h2 id=\"checkpoint%e7%9a%84%e9%a1%9e%e5%9e%8b-gfBbNlRCmw\">Checkpoint\u7684\u985e\u578b<\/h2>\n<p>PostgreSQL\u4e2d\u6709\u5e7e\u7a2e\u4e0d\u540c\u985e\u578b\u7684checkpoint\uff1a<\/p>\n<ul>\n<li><strong>\u81ea\u52d5checkpoint\uff1a<\/strong>\u9019\u662fPostgreSQL\u6839\u64da\u8a2d\u5b9a\u7684\u53c3\u6578\u81ea\u52d5\u57f7\u884c\u7684checkpoint\u3002\u901a\u5e38\uff0c\u9019\u4e9b\u53c3\u6578\u5305\u62eccheckpoint_timeout\u548cmax_wal_size\u3002<\/li>\n<li><strong>\u624b\u52d5checkpoint\uff1a<\/strong>\u7528\u6236\u53ef\u4ee5\u901a\u904e\u57f7\u884cSQL\u547d\u4ee4\u4f86\u624b\u52d5\u89f8\u767ccheckpoint\uff0c\u9019\u5728\u9700\u8981\u7acb\u5373\u6301\u4e45\u5316\u8cc7\u6599\u6642\u975e\u5e38\u6709\u7528\u3002<\/li>\n<li><strong>\u7dca\u6025checkpoint\uff1a<\/strong>\u5728\u7cfb\u7d71\u767c\u751f\u6545\u969c\u6216\u9700\u8981\u7acb\u5373\u4fdd\u8b77\u8cc7\u6599\u6642\uff0cPostgreSQL\u6703\u57f7\u884c\u7dca\u6025checkpoint\u3002<\/li>\n<\/ul>\n<h2 id=\"checkpoint%e7%9a%84%e5%bd%b1%e9%9f%bf-gfBbNlRCmw\">Checkpoint\u7684\u5f71\u97ff<\/h2>\n<p>Checkpoint\u5c0d\u8cc7\u6599\u5eab\u6027\u80fd\u6709\u8457\u76f4\u63a5\u7684\u5f71\u97ff\u3002\u96d6\u7136\u5b9a\u671f\u57f7\u884ccheckpoint\u53ef\u4ee5\u63d0\u9ad8\u8cc7\u6599\u7684\u5b89\u5168\u6027\uff0c\u4f46\u904e\u65bc\u983b\u7e41\u7684checkpoint\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\uff0c\u56e0\u70ba\u6bcf\u6b21checkpoint\u90fd\u9700\u8981\u5c07\u5927\u91cf\u8cc7\u6599\u5beb\u5165\u78c1\u789f\u3002\u76f8\u53cd\uff0c\u5982\u679ccheckpoint\u57f7\u884c\u5f97\u592a\u5c11\uff0c\u5247\u53ef\u80fd\u6703\u5c0e\u81f4\u5728\u7cfb\u7d71\u5d29\u6f70\u6642\u4e1f\u5931\u5927\u91cf\u8cc7\u6599\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u5408\u7406\u914d\u7f6echeckpoint\u7684\u53c3\u6578\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u7528\u6236\u53ef\u4ee5\u6839\u64da\u5be6\u969b\u7684\u5de5\u4f5c\u8ca0\u8f09\u548c\u7cfb\u7d71\u6027\u80fd\u9700\u6c42\u4f86\u8abf\u6574\u9019\u4e9b\u53c3\u6578\uff0c\u4ee5\u9054\u5230\u6700\u4f73\u7684\u5e73\u8861\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e9%85%8d%e7%bd%aecheckpoint-gfBbNlRCmw\">\u5982\u4f55\u914d\u7f6eCheckpoint<\/h2>\n<p>\u5728PostgreSQL\u4e2d\uff0c\u7528\u6236\u53ef\u4ee5\u901a\u904e\u4fee\u6539postgresql.conf\u914d\u7f6e\u6a94\u4f86\u8abf\u6574checkpoint\u7684\u884c\u70ba\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u53c3\u6578\uff1a<\/p>\n<ul>\n<li><code>checkpoint_timeout<\/code>\uff1a\u8a2d\u5b9a\u5169\u6b21checkpoint\u4e4b\u9593\u7684\u6700\u5927\u6642\u9593\u9593\u9694\u3002<\/li>\n<li><code>max_wal_size<\/code>\uff1a\u8a2d\u5b9aWAL\u65e5\u8a8c\u7684\u6700\u5927\u5927\u5c0f\uff0c\u8d85\u904e\u6b64\u5927\u5c0f\u5f8c\u6703\u89f8\u767ccheckpoint\u3002<\/li>\n<li><code>checkpoint_completion_target<\/code>\uff1a\u8a2d\u5b9acheckpoint\u5b8c\u6210\u7684\u76ee\u6a19\u6642\u9593\uff0c\u9019\u6709\u52a9\u65bc\u5e73\u6ed1\u5beb\u5165\u8ca0\u8f09\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u4ee5\u4e0b\u914d\u7f6e\u5c07checkpoint_timeout\u8a2d\u7f6e\u70ba5\u5206\u9418\uff0cmax_wal_size\u8a2d\u7f6e\u70ba1GB\uff1a<\/p>\n<pre><code>checkpoint_timeout = 5min\nmax_wal_size = 1GB\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-gfBbNlRCmw\">\u7e3d\u7d50<\/h2>\n<p>Checkpoint\u662fPostgreSQL\u4e2d\u4e00\u500b\u81f3\u95dc\u91cd\u8981\u7684\u6a5f\u5236\uff0c\u5c0d\u65bc\u8cc7\u6599\u7684\u6301\u4e45\u5316\u548c\u7cfb\u7d71\u7684\u6062\u5fa9\u80fd\u529b\u6709\u8457\u91cd\u8981\u7684\u5f71\u97ff\u3002\u901a\u904e\u5408\u7406\u914d\u7f6echeckpoint\u7684\u53c3\u6578\uff0c\u7528\u6236\u53ef\u4ee5\u5728\u6027\u80fd\u548c\u8cc7\u6599\u5b89\u5168\u6027\u4e4b\u9593\u627e\u5230\u6700\u4f73\u5e73\u8861\u3002\u4e86\u89e3checkpoint\u7684\u5de5\u4f5c\u539f\u7406\u548c\u914d\u7f6e\u65b9\u6cd5\uff0c\u5c0d\u65bc\u4efb\u4f55\u4f7f\u7528PostgreSQL\u7684\u958b\u767c\u8005\u548c\u7cfb\u7d71\u7ba1\u7406\u54e1\u4f86\u8aaa\u90fd\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK\u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u8cc7\u6599\u5eab\u7ba1\u7406\u9084\u662f\u5176\u4ed6\u61c9\u7528\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u63a2\u8ba8PostgreSQL\u4e2d\u7684checkpoint\u6982\u5ff5\uff0c\u4e86\u89e3\u5176\u5728\u6570\u636e\u4e00\u81f4\u6027\u548c\u6027\u80fd\u4f18\u5316\u4e2d\u7684\u91cd\u8981\u6027\u4e0e\u5b9e\u73b0\u673a\u5236\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-191630","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/191630","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=191630"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/191630\/revisions"}],"predecessor-version":[{"id":191631,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/191630\/revisions\/191631"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=191630"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=191630"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=191630"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}