{"id":41837,"date":"2022-09-06T06:23:31","date_gmt":"2023-07-31T00:15:34","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8postgresql%e4%b8%ad%e5%90%af%e7%94%a8autovaccum%e3%80%82\/"},"modified":"2024-01-15T11:10:20","modified_gmt":"2024-01-15T03:10:20","slug":"%e5%9c%a8postgresql%e4%b8%ad%e5%90%af%e7%94%a8autovaccum%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8postgresql%e4%b8%ad%e5%90%af%e7%94%a8autovaccum%e3%80%82\/","title":{"rendered":"\u5728PostgreSQL\u4e2d\u542f\u7528autovaccum"},"content":{"rendered":"<h2>\u73af\u5883<\/h2>\n<p>PostgreSQL12.4\u548cUbuntu20.4<\/p>\n<h2>\u9996\u5148<\/h2>\n<p>\u4e00\u65e6\u5f00\u59cb\u8fd0\u884cPostgreSQL\uff0c\u5c31\u5fc5\u987b\u6bcf\u5929\u8fdb\u884c\u8fd0\u7ef4\u7ba1\u7406\u3002\u7279\u522b\u91cd\u8981\u7684\u662fVACUUM\u548cANALYZE\u3002\u6839\u636e\u5b98\u65b9\u4fe1\u606f\uff0c\u81ea\u52a8VACUUM\u88ab\u5f3a\u70c8\u63a8\u8350\u4f7f\u7528\u3002<\/p>\n<h2>\u5438\u5c18\u5668<\/h2>\n<p>\u5f53\u8868\u683c\u88ab\u591a\u6b21\u66f4\u65b0\u6216\u5220\u9664\u65f6\uff0c\u4f1a\u5bfc\u81f4\u88ab\u79f0\u4e3a\u7a7a\u95f2\u7684\u65e0\u7528\u7a7a\u95f4\uff08\u79f0\u4e3a\u5143\u7ec4\uff09\u6301\u7eed\u5b58\u5728\u3002\u4e3a\u4e86\u6e05\u9664PostgreSQL\u6d6a\u8d39\u7684\u78c1\u76d8\u7a7a\u95f4\u5e76\u907f\u514d\u78c1\u76d8\u5bb9\u91cf\u4e0d\u8db3\uff0cVACCUM\u529f\u80fd\u53ef\u4ee5\u5b9e\u73b0\u8fd9\u4e00\u70b9\u3002PostgreSQL\u91c7\u7528\u4e86\u88ab\u79f0\u4e3a\u591a\u7248\u672c\u5e76\u53d1\u63a7\u5236\uff08MVCC\uff09\u7684\u67b6\u6784\uff0c\u8fd9\u610f\u5473\u7740\u5728\u7ed3\u6784\u4e0a\u65e0\u8bba\u5982\u4f55\u90fd\u4f1a\u4ea7\u751f\u5143\u7ec4\u3002<\/p>\n<p>\u5982\u679c\u6709\u8bb8\u591a\u8868\u683c\u66f4\u65b0\/\u5220\u9664\u64cd\u4f5c\uff0c\u5143\u7ec4\u7684\u5bb9\u91cf\u5c06\u5448\u6307\u6570\u589e\u957f\u3002\u5f53\u5143\u7ec4\u7684\u5bb9\u91cf\u589e\u5927\u65f6\uff0c\u4f1a\u5f71\u54cd\u5230\u5bf9\u6570\u636e\u5e93\u7684\u8bfb\u53d6\/\u5199\u5165\u901f\u5ea6\u3002<\/p>\n<p>\u5728\u67d0\u4e2a\u65f6\u673a\u5b9a\u671f\u6267\u884cVACUUM\u64cd\u4f5c\uff0c\u5c06\u81a8\u5927\u7684\u6570\u636e\u5e93\u5bb9\u91cf\u6062\u590d\u5230\u5b9e\u9645\u5bb9\u91cf\u662f\u5fc5\u8981\u7684\u3002\u8fd9\u4e2a\u529f\u80fd\u7c7b\u4f3c\u4e8eMS-Access\u6570\u636e\u5e93\u7684\u4f18\u5316\u3002<\/p>\n<p>\u6267\u884cVACCUM\u65f6\u4e0d\u4f1a\u5bf9\u8868\u65bd\u52a0\u6392\u5b83\u9501\uff0c\u4ee5\u786e\u4fdd\u4e0d\u4f1a\u5f71\u54cd\u7528\u6237\u8bbf\u95ee\u3002\u65e0\u9700\u5728\u6df1\u591c\u79d8\u5bc6\u6267\u884c\uff0c\u53ef\u4ee5\u653e\u5fc3\u5730\u5728\u767d\u5929\u6267\u884c\u3002<\/p>\n<p>\u6709\u4e00\u500b\u985e\u4f3c\u65bcvacuum\u547d\u4ee4\u7684\u547d\u4ee4\uff0c\u7a31\u70bavaccum full\u547d\u4ee4\u3002vacuum\u547d\u4ee4\u4e0d\u6703\u5c0d\u6392\u4ed6\u9396\u9032\u884c\u8655\u7406\uff0c\u4f46vaccum full\u547d\u4ee4\u6703\u5c0d\u6392\u4ed6\u9396\u9032\u884c\u8655\u7406\u3002\u5982\u679c\u624b\u52d5\u57f7\u884cvaccum full\u547d\u4ee4\uff0c\u5c07\u6703\u5c0d\u7528\u6236\u7684\u8a2a\u554f\u7522\u751f\u5f71\u97ff\uff0c\u56e0\u6b64\u5fc5\u9808\u907f\u514d\u5728\u5de5\u4f5c\u6642\u9593\u57f7\u884c\u3002\u81ea\u52d5\u7684vacuum\u904e\u7a0b\u4e2d\uff0c\u4f7f\u7528\u7684\u662fvacuum\u547d\u4ee4\u800c\u4e0d\u662fvaccum full\u547d\u4ee4\uff0c\u8acb\u653e\u5fc3\u3002vaccum full\u547d\u4ee4\u53ea\u80fd\u624b\u52d5\u57f7\u884c\u3002<\/p>\n<h2>\u5206\u6790<\/h2>\n<p>ANALYZE\u662f\u7528\u6765\u66f4\u65b0\u6bcf\u4e2a\u8868\u7684\u7edf\u8ba1\u4fe1\u606f\u81f3\u6700\u65b0\u72b6\u6001\u7684\u3002\u4e3a\u4e86\u52a0\u5feb\u8868\u7684\u67e5\u8be2\u54cd\u5e94\u901f\u5ea6\uff0c\u4f1a\u521b\u5efa\u7d22\u5f15\uff0c\u4f46\u5982\u679c\u7edf\u8ba1\u4fe1\u606f\u8fc7\u65f6\uff0c\u5373\u4f7f\u521b\u5efa\u4e86\u7d22\u5f15\uff0c\u4e5f\u65e0\u6cd5\u83b7\u5f97\u76f8\u5e94\u7684\u6027\u80fd\u63d0\u5347\u3002<\/p>\n<p>\u5982\u679c\u8868\u7684\u66f4\u65b0\/\u5220\u9664\u9891\u7e41\u8fdb\u884c\uff0c\u7edf\u8ba1\u4fe1\u606f\u7684\u72b6\u6001\u5c06\u4e0e\u5b9e\u9645\u60c5\u51b5\u8d8a\u6765\u8d8a\u8131\u8282\u3002\u901a\u8fc7\u4f7f\u7edf\u8ba1\u4fe1\u606f\u4fdd\u6301\u6700\u65b0\uff0c\u53ef\u4ee5\u52a0\u5febSelect\u8bed\u53e5\u7684\u54cd\u5e94\u901f\u5ea6\u3002\u5982\u679c\u6700\u8fd1\u89c9\u5f97\u54cd\u5e94\u53d8\u6162\u4e86\uff0c\u5e94\u8be5\u6267\u884cANALYZE\u3002<\/p>\n<p>\u5f53\u6267\u884cANALYZE\u65f6\uff0c\u5bf9\u8868\u8fdb\u884c\u4e34\u65f6\u8bfb\u53d6\u9501\u5b9a\uff0c\u4f46\u4e0d\u4f1a\u8fdb\u884c\u6392\u4ed6\u9501\u5b9a\u3002\u7531\u4e8e\u6267\u884cANALYZE\u4e0d\u4f1a\u5bfc\u81f4\u7528\u6237\u54cd\u5e94\u901f\u5ea6\u964d\u4f4e\uff0c\u56e0\u6b64\u53ef\u4ee5\u5728\u767d\u5929\u5802\u7687\u5730\u6267\u884c\u3002<\/p>\n<h2>\u8bbe\u5b9a<\/h2>\n<p>VACUUM\u548cANAZYZE\u53ef\u4ee5\u901a\u8fc7\u547d\u4ee4\u624b\u52a8\u6267\u884c\uff0c\u4e5f\u53ef\u4ee5\u5728PostgreSQL\u7aef\u8fdb\u884c\u81ea\u52a8\u5316\u3002\u8981\u5b9e\u73b0\u81ea\u52a8\u5316\uff0c\u53ea\u9700\u5728postgresql.conf\u4e2d\u8bbe\u7f6e\u4e0b\u9762\u4e24\u884c\u53c2\u6570\u5373\u53ef\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u8fd9\u4e24\u884c\u53c2\u6570\u90fd\u88ab\u6ce8\u91ca\u6389\u4e86\uff0c\u53ea\u9700\u8981\u53d6\u6d88\u6ce8\u91ca\u5373\u53ef\u3002<\/p>\n<pre class=\"post-pre\"><code>autovaccume = on\r\ntrack_counts = on\r\n<\/code><\/pre>\n<p>\u542f\u7528\u81ea\u52a8\u5438\u5c18\u529f\u80fd\u540e\uff0cANALYZE\u4e5f\u4f1a\u81ea\u52a8\u6267\u884c\u3002\u81ea\u52a8\u5438\u5c18\u7684\u5b88\u62a4\u7a0b\u5e8f\u5df2\u7ecf\u5f00\u59cb\u5f15\u7528\u7edf\u8ba1\u4fe1\u606f\uff0c\u56e0\u6b64\u81ea\u7136\u800c\u7136\u5730\u4e5f\u4f1a\u6d41\u52a8ANALYZE\u3002<\/p>\n<p>\u5982\u679c\u542f\u7528\u81ea\u52a8\u5438\u5c18\u7a0b\u5e8f\uff0c\u8be5\u7a0b\u5e8f\u5c06\u5e38\u9a7b\u8fd0\u884c\u3002\u5f53\u4efb\u52a1\u9608\u503c\u8d85\u8fc7\u65f6\uff0c\u5438\u5c18\u673a\u5c06\u81ea\u52a8\u6267\u884c\u3002<\/p>\n<h2>\u53c2\u6570<\/h2>\n<p>\u6839\u636e\u516c\u5f0f\u624b\u518c\u7684\u8bf4\u660e\uff0c\u6267\u884cVACCUM\u65f6\uff0c\u5bf9\u4e8e\u78c1\u76d8\u800c\u8a00\uff0c\u4f1a\u8fd0\u884c\u76f8\u5f53\u6570\u91cf\u7684I\/O\u64cd\u4f5c\u3002\u5982\u679c\u78c1\u76d8\u7a7a\u95f4\u5145\u8db3\uff0c\u4e3a\u4e86\u5c3d\u53ef\u80fd\u51cf\u5c11\u5bf9\u54cd\u5e94\u7684\u5f71\u54cd\uff0c\u5e94\u8be5\u5c3d\u91cf\u51cf\u5c11VACCUM\u8fd0\u884c\u7684\u95f4\u9694\u3002\u5728\u542f\u7528\u81ea\u52a8\u6e05\u7406\u4e4b\u524d\uff0c\u5e94\u8be5\u8003\u8651\u4e00\u4e9b\u53c2\u6570\u3002<\/p>\n<p>\u81ea\u52a8\u6267\u884c\u6e05\u7406\u7684\u68c0\u67e5\u95f4\u9694\u3002\u9ed8\u8ba4\u4e3a1\u5206\u949f\u3002\u6839\u636e\u4f7f\u7528\u60c5\u51b5\u800c\u5b9a\uff0c\u5982\u679c\u60a8\u8ba4\u4e3a1\u5206\u949f\u592a\u77ed\u4e86\uff0c\u90a3\u4e48\u8bf7\u5c06\u6b64\u8bbe\u7f6e\u5ef6\u957f\u3002<\/p>\n<pre class=\"post-pre\"><code>autovacuum_naptime = 1min\r\n<\/code><\/pre>\n<p>\u8fd9\u662f\u8bbe\u7f6e\u6267\u884c VACCUM \u7684\u9608\u503c\u3002\u9608\u503c\u5c06\u4f7f\u7528\u4ee5\u4e0b\u516c\u5f0f\u8ba1\u7b97\uff1a<br \/>\n&#8220;autovacuum_vacuum_threshold + autovacuum_vacuum_scale_factor \u00d7 \u8bb0\u5f55\u6570&#8221;<\/p>\n<p>\u5982\u679c\u8868\u4e2d\u6709100\u4e2a\u6570\u636e\uff0c\u6839\u636e\u9ed8\u8ba4\u503c\u7684\u8bbe\u7f6e\uff0c\u90a3\u4e48\u7ed3\u679c\u5c06\u4e3a70\uff0850 + 0.2 \u00d7 100\uff09\u3002<br \/>\n\u5982\u679c\u6570\u636e\u670970\u4e2a\u88ab\u66f4\u65b0\/\u5220\u9664\uff0c\u90a3\u4e48\u5c06\u6267\u884cVACCUM\u64cd\u4f5c\u3002<\/p>\n<p>\u5982\u679c\u8868\u683c\u4e2d\u67091000\u6761\u6570\u636e\uff0c\u5e76\u4e14\u9ed8\u8ba4\u503c\u5df2\u7ecf\u8bbe\u7f6e\u597d\u7684\u8bdd\uff0c<br \/>\n50 + 0.2 \u00d7 1000 = 250\u3002<br \/>\n\u5982\u679c\u6709250\u6761\u6570\u636e\u88ab\u66f4\u65b0\/\u5220\u9664\uff0c\u90a3\u4e48VACCUM\u64cd\u4f5c\u5c06\u88ab\u6267\u884c\u3002<\/p>\n<p>\u6211\u4e2a\u4eba\u8ba4\u4e3a\u8fd9\u91cc\u7684\u8bbe\u7f6e\u9ed8\u8ba4\u503c\u662f\u5408\u7406\u7684\u3002\u4f46\u662f\u6839\u636e\u60c5\u51b5\u53ef\u80fd\u9700\u8981\u81ea\u5b9a\u4e49\u8c03\u6574\u3002<\/p>\n<pre class=\"post-pre\"><code>autovacuum_vacuum_threshold     = 50\r\nautovacuum_vacuum_scale_factor  = 0.2\r\n<\/code><\/pre>\n<h2>\u8bf7\u63d0\u4f9b\u53c2\u8003\u8d44\u6599\u3002<\/h2>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u73af\u5883 PostgreSQL12.4\u548cUbuntu20.4 \u9996\u5148 \u4e00\u65e6\u5f00\u59cb\u8fd0\u884cPostgreSQL\uff0c\u5c31\u5fc5\u987b\u6bcf\u5929\u8fdb [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-41837","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"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>\u5728PostgreSQL\u4e2d\u542f\u7528autovaccum - Blog - Silicon Cloud<\/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.silicloud.com\/zh\/blog\/\u5728postgresql\u4e2d\u542f\u7528autovaccum\u3002\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5728PostgreSQL\u4e2d\u542f\u7528autovaccum\" \/>\n<meta property=\"og:description\" content=\"\u73af\u5883 PostgreSQL12.4\u548cUbuntu20.4 \u9996\u5148 \u4e00\u65e6\u5f00\u59cb\u8fd0\u884cPostgreSQL\uff0c\u5c31\u5fc5\u987b\u6bcf\u5929\u8fdb [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5728postgresql\u4e2d\u542f\u7528autovaccum\u3002\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-31T00:15:34+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-01-15T03:10:20+00:00\" \/>\n<meta name=\"author\" content=\"\u79d1, \u96c5\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u79d1, \u96c5\" \/>\n<script type=\"application\/ld+json\" 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