{"id":42184,"date":"2022-09-10T01:36:35","date_gmt":"2023-08-11T21:00:05","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90%e5%a4%84%e7%90%86%e6%97%b6%e9%97%b4%e3%80%91%e6%97%a5%e5%bf%97%e8%be%93%e5%87%ba%e8%ae%be%e7%bd%ae\/"},"modified":"2024-01-15T11:19:08","modified_gmt":"2024-01-15T03:19:08","slug":"%e3%80%90%e5%a4%84%e7%90%86%e6%97%b6%e9%97%b4%e3%80%91%e6%97%a5%e5%bf%97%e8%be%93%e5%87%ba%e8%ae%be%e7%bd%ae","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90%e5%a4%84%e7%90%86%e6%97%b6%e9%97%b4%e3%80%91%e6%97%a5%e5%bf%97%e8%be%93%e5%87%ba%e8%ae%be%e7%bd%ae\/","title":{"rendered":"\u3010\u5904\u7406\u65f6\u95f4\u3011\u65e5\u5fd7\u8f93\u51fa\u8bbe\u7f6e"},"content":{"rendered":"

\u53ef\u4ee5\u4f7f\u7528postgresql\u7684auto_explain\u529f\u80fd\u6765\u8bb0\u5f55\u65e5\u5fd7\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u67e5\u770b\u6bcf\u4e2aSQL\u7684\u5904\u7406\u65f6\u95f4\uff0c\u4ee5\u6b64\u6765\u5224\u65ad\u662f\u5426\u8d85\u8fc7\u4e86\u6307\u5b9a\u7684\u79d2\u6570\u9608\u503c\u3002<\/p>\n

\u5c06\u8f93\u51fa\u793a\u4f8b\u53d1\u9001\u5230postgresql.log\u6587\u4ef6\u4e2d<\/h2>\n
Sep 24 11:59:37 dev postgres[12692]: [21-1] LOG:  duration: 0.518 ms  plan:\r\nSep 24 11:59:37 dev postgres[12692]: [21-2] #011Query Text: UPDATE dtb_session SET sess_data= $1, update_date= CURRENT_TIMESTAMP WHERE sess_id = $2\r\nSep 24 11:59:37 dev postgres[12692]: [21-3] #011Update on dtb_session  (cost=0.00..6.07 rows=1 width=47)\r\nSep 24 11:59:37 dev postgres[12692]: [21-4] #011  ->  Seq Scan on dtb_session  (cost=0.00..6.07 rows=1 width=47)\r\nSep 24 11:59:37 dev postgres[12692]: [21-5] #011        Filter: (sess_id = $2)\r\n<\/code><\/pre>\n
\u9700\u8981\u7f16\u8bd1postgresql\u6a21\u5757\u624d\u80fd\u5b8c\u6210\u8bbe\u7f6e\u3002
\n\u4ee5\u4e0b\u662f\u8bbe\u7f6e\u6b65\u9aa4\u3002
\n\u8bf7\u6839\u636e\u9700\u8981\u81ea\u884c\u66f4\u6539\u7248\u672c\u3002<\/p>\n
$ cd \/usr\/local\/src\r\n$ tar zxvf postgresql-9.1.9.tar.gz\r\n$ cd postgresql-9.1.9\r\n$ cp -i ..\/config.nice-postgresql-9.1.9 .\r\n$ .\/config.nice-postgresql-9.1.9\r\n$ make\r\n<\/code><\/pre>\n
\u203b \u4e0d\u8981\u8fd0\u884c make install\uff01<\/p>\n
$ cd contrib\/auto_explain\r\n$ make\r\n$ make install\r\n<\/code><\/pre>\n
\u8fd9\u8fb9\u8981\u6267\u884cmake install\u3002<\/p>\n
\u8ffd\u52a0postgresql.conf\u914d\u7f6e<\/h2>\n
$ vi \/var\/lib\/pgsql\/data\/postgresql.conf\r\n<\/code><\/pre>\n
\u6240\u4ee5\uff0c\u4e0b\u9762\u7684\u884c\u88ab\u6ce8\u91ca\u6389\u4e86\u3002<\/p>\n
#shared_preload_libraries = ''             # (change requires restart)\r\nshared_preload_libraries = \u2018auto_explain'  # (change requires restart)\r\n#custom_variable_classes = ''              # list of custom variable class names\r\ncustom_variable_classes = 'auto_explain'   # list of custom variable class names\r\n<\/code><\/pre>\n
\u91cd\u542fPostgreSQL\u3002<\/p>\n
$ \/etc\/init.d\/pgsql restart\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u53ef\u4ee5\u4f7f\u7528postgresql\u7684auto_explain\u529f\u80fd\u6765\u8bb0\u5f55\u65e5\u5fd7\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u67e5\u770b\u6bcf\u4e2aSQL\u7684\u5904\u7406\u65f6\u95f4\uff0c\u4ee5\u6b64 […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-42184","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n\u3010\u5904\u7406\u65f6\u95f4\u3011\u65e5\u5fd7\u8f93\u51fa\u8bbe\u7f6e - 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\/\u3010\u5904\u7406\u65f6\u95f4\u3011\u65e5\u5fd7\u8f93\u51fa\u8bbe\u7f6e\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010\u5904\u7406\u65f6\u95f4\u3011\u65e5\u5fd7\u8f93\u51fa\u8bbe\u7f6e\" \/>\n<meta property=\"og:description\" content=\"\u53ef\u4ee5\u4f7f\u7528postgresql\u7684auto_explain\u529f\u80fd\u6765\u8bb0\u5f55\u65e5\u5fd7\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u67e5\u770b\u6bcf\u4e2aSQL\u7684\u5904\u7406\u65f6\u95f4\uff0c\u4ee5\u6b64 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010\u5904\u7406\u65f6\u95f4\u3011\u65e5\u5fd7\u8f93\u51fa\u8bbe\u7f6e\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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