{"id":7564,"date":"2023-06-26T17:04:31","date_gmt":"2023-06-26T08:04:31","guid":{"rendered":"https:\/\/www.lancard.com\/blog\/?p=7564"},"modified":"2025-03-12T11:22:15","modified_gmt":"2025-03-12T02:22:15","slug":"postgresql-max_connections-and-rolconnlimit","status":"publish","type":"post","link":"https:\/\/www.lancard.com\/blog\/2023\/06\/26\/postgresql-max_connections-and-rolconnlimit\/","title":{"rendered":"PostgreSQL\u306emax_connections\u3068\u30e6\u30fc\u30b6\u3054\u3068\u306e\u5236\u9650"},"content":{"rendered":"\n\n
\n
\nPostgreSQL\u3067\u306fmax_connections\u3067\u5168\u4f53\u306e\u63a5\u7d9a\u6570\u3092\u5236\u9650\u51fa\u6765\u307e\u3059\u304c\u3001\u30e6\u30fc\u30b6\u3054\u3068\u306b\u3082\u5236\u9650\u3092\u3059\u308b\u4e8b\u304c\u51fa\u6765\u307e\u3059\u3002\n<\/div>\n<\/div>\n\n\n\n\n\n
ALTER ROLE dbuser CONNECTION LIMIT 10;\n-- \u78ba\u8a8d\nSELECT rolconnlimit FROM pg_roles WHERE rolname = 'dbuser';<\/code><\/pre>\n\n\n\n\n\n
\n
\n\u3053\u308c\u3067dbuser\u306f10\u4ee5\u4e0a\u63a5\u7d9a\u3059\u308b\u4e8b\u304c\u51fa\u6765\u306a\u304f\u306a\u308a\u307e\u3059\u3002
\u5236\u9650\u3092\u306a\u304f\u3059\u5834\u5408\u306f\u3001CONNECTION LIMIT \u3092 \u30c7\u30d5\u30a9\u30eb\u30c8\u306e -1 \u306b\u623b\u3057\u307e\u3059\u3002\n<\/div>\n<\/div>\n\n\n\n\n\n
\n
\n\u3067\u306frolconnlimit > max_connections\u3060\u3063\u305f\u5834\u5408\u306f\u3069\u3046\u306a\u308b\u304b\u3068\u8a00\u3046\u3068\u3001max_connections\u304c\u512a\u5148\u3055\u308c\u307e\u3059\uff08\u8a2d\u5b9a\u81ea\u4f53\u306f\u51fa\u6765\u3066\u3057\u307e\u3044\u307e\u3059\u304c\uff09\u3002
\u306a\u306e\u3067\u5b9f\u969b\u306f\u3001\u6b63\u306erolconnlimit\u306e\u5408\u8a08 <= max_connections – superuser_reserved_connections \u3067\u8a2d\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u6709\u308a\u305d\u3046\u3067\u3059\u3002
\n<\/div>\n<\/div>\n\n\"Facebook\"<\/a>\"twitter\"<\/a>\"linkedin\"<\/a>\"tumblr\"<\/a>\"mail\"<\/a>","protected":false},"excerpt":{"rendered":"
PostgreSQL\u3067\u306fmax_connections\u3067\u5168\u4f53\u306e\u63a5\u7d9a\u6570\u3092\u5236\u9650\u51fa\u6765\u307e\u3059\u304c\u3001\u30e6\u30fc\u30b6\u3054\u3068\u306b\u3082\u5236\u9650\u3092\u3059\u308b\u4e8b\u304c\u51fa\u6765\u307e\u3059\u3002 \u3053\u308c\u3067dbuser\u306f10\u4ee5\u4e0a\u63a5\u7d9a\u3059\u308b\u4e8b\u304c\u51fa\u6765\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u5236\u9650\u3092\u306a\u304f\u3059\u5834\u5408\u306f\u3001CONNECTI […]<\/p>\n","protected":false},"author":17,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-7564","post","type-post","status-publish","format-standard","hentry","category-1"],"_links":{"self":[{"href":"https:\/\/www.lancard.com\/blog\/wp-json\/wp\/v2\/posts\/7564","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lancard.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lancard.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lancard.com\/blog\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lancard.com\/blog\/wp-json\/wp\/v2\/comments?post=7564"}],"version-history":[{"count":26,"href":"https:\/\/www.lancard.com\/blog\/wp-json\/wp\/v2\/posts\/7564\/revisions"}],"predecessor-version":[{"id":7590,"href":"https:\/\/www.lancard.com\/blog\/wp-json\/wp\/v2\/posts\/7564\/revisions\/7590"}],"wp:attachment":[{"href":"https:\/\/www.lancard.com\/blog\/wp-json\/wp\/v2\/media?parent=7564"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lancard.com\/blog\/wp-json\/wp\/v2\/categories?post=7564"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lancard.com\/blog\/wp-json\/wp\/v2\/tags?post=7564"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}