{"Entry":{"collection":"guc","key":"ident_file","name":"ident_file","aliases":[],"metadata":{"baseline":false,"boot_human":"Not specified","boot_val":null,"category":"File Locations","category_zh":"","changed_in":[],"changes":[{"documentation_changed":false,"fields":{},"from":"7.4","status":"added","to":"8.0"},{"documentation_changed":true,"fields":{},"from":"8.1","status":"changed","to":"8.2"},{"documentation_changed":true,"fields":{},"from":"8.3","status":"changed","to":"8.4"},{"documentation_changed":true,"fields":{},"from":"8.4","status":"changed","to":"9.0"},{"documentation_changed":true,"fields":{},"from":"9.1","status":"changed","to":"9.2"},{"documentation_changed":true,"fields":{},"from":"9.5","status":"changed","to":"9.6"},{"documentation_changed":true,"fields":{},"from":"13","status":"changed","to":"14"},{"documentation_changed":true,"fields":{},"from":"16","status":"changed","to":"17"}],"content_hash":"19f2bed501a42dcab5ce84912bddfe52121750ed66cc54126ba58e887d02949c","context":"","default_changed_in":[],"default_history":[{"from":"9.0","to":"19","value":"Not specified"}],"editorial":{"advice":{"olap":"Follow the OLTP rule, and for separate mounts also verify boot ordering, backup coverage, and path consistency on failover nodes.","oltp":"ident_file is deployment topology, not workload tuning. Use an absolute path, least privilege, and atomic configuration rollout; verify access as the postgres service account before restart/reload.","small":"The default co-located layout is simplest. Split paths only for a concrete backup, packaging, or permission-isolation benefit."},"mechanism":["Sets the server's \"ident\" configuration file. The value is fixed when the server starts, so changing it requires a restart.","This path selects pg_ident.conf, whose maps translate authenticated operating-system or certificate names to database roles. The path is fixed at startup; contents are re-read on reload and only matter to authentication methods that name a map.","Monitor and change ident_file together with allow_alter_system, config_file, data_directory. Validate on the relevant server role and real workload, then use its postmaster context to choose session change, reload, or restart; a historical boot default is not the current effective value."],"pitfalls":["Missing directory traversal, read, or write permission for the service account.","Confusing restart requirements for a path with reload behavior of the selected file contents.","Omitting the path on a failover node or from backup inventory.","Using a relative path that depends on an unstable working directory."],"references":[{"title":"PostgreSQL 19 Beta 4: ident_file","url":"https://www.postgresql.org/docs/19/runtime-config-file-locations.html#GUC-IDENT-FILE"},{"title":"PostgreSQL 19 release notes","url":"https://www.postgresql.org/docs/19/release-19.html"}],"related":["allow_alter_system","config_file","data_directory","hba_file","external_pid_file","extension_destdir"],"summary":"ident_file — Sets the server's \"ident\" configuration file. Observed in PG9.0–19 Beta 4; its last measured boot default is not set in PG19 Beta 4, with postmaster context. This is a beta-snapshot fact and can change before PostgreSQL 19 GA."},"enumvals":[],"first_version":"8.0","group":"File Locations","group_slug":"file-locations","imported_at":"2026-09-27T17:57:31.371072+08:00","intro_commit":{},"key":"ident_file","last_version":"20","max_val":"","min_val":"","name":"ident_file","position":172,"present_in":["8.0","8.1","8.2","8.3","8.4","9.0","9.1","9.2","9.3","9.4","9.5","9.6","10","11","12","13","14","15","16","17","18","19","20"],"short_desc":"Specifies the configuration file for user name mapping (customarily called pg_ident.conf).","short_desc_zh":"","source_rev":"english-manuals:c08acfee02379ea8acf96722cefcb3d73c473a5c52212c0f37c03fb74a94a451","unit":"","vartype":"string"}},"Definition":{"Collection":"guc","Key":"ident_file","SourceDatabase":"center","Version":"18","SourceTable":"guc","SourceKey":"ident_file","SourceRevision":"english-manuals:c08acfee02379ea8acf96722cefcb3d73c473a5c52212c0f37c03fb74a94a451","Facts":{"boot_val":null,"category":"File Locations","context":"postmaster","description":"Specifies the configuration file for user name mapping (customarily called pg_ident.conf). This parameter can only be set at server start. See also Section 20.2.","doc":{"anchor":"GUC-IDENT-FILE","file":"runtime-config-file-locations.html","lang":"en","sha256":"d32b4a6043ad0ec1a0b4d476f80aa279be0a3491176860e0d2f2439eddf612ad","slug":"18"},"documented":true,"enumvals":null,"extra_desc":null,"lang":"en","max_val":null,"metadata_version":"18","min_val":null,"name":"ident_file","short_desc":"Sets the server's \"ident\" configuration file.","source":"pg-settings-source-snapshot","unit":null,"vartype":"string"},"ManualEvidence":{"doc":{"anchor":"GUC-IDENT-FILE","file":"runtime-config-file-locations.html","lang":"en","sha256":"d32b4a6043ad0ec1a0b4d476f80aa279be0a3491176860e0d2f2439eddf612ad","slug":"18"}},"MeasuredEvidence":{"metadata_version":"18"}},"Text":{"Collection":"guc","Key":"ident_file","SourceDatabase":"pgweb","Version":"18","Locale":"zh-Hans","Title":"ident_file","Summary":"","BodyHTML":"\u003cp\u003e指定用于用户名称映射的配置文件（通常叫\u003ccode\u003epg_ident.conf\u003c/code\u003e）。这个参数只能在服务器启动的时候设置。另见\u003ca href=\"/docs/18/auth-username-maps.html\" rel=\"nofollow\"\u003e第 20.2 节\u003c/a\u003e。\u003c/p\u003e","SourceRevision":"2026-09-11@29c86d9","ContentHash":"2b25fcc4f17dace4ac643d34935f6cabf61605c5a72da4f30757638027beee88","Payload":{"carried_from":"","carry_reason":"","doc_html":"\u003cp\u003e指定用于用户名称映射的配置文件（通常叫\u003ccode class=\"filename\"\u003epg_ident.conf\u003c/code\u003e）。这个参数只能在服务器启动的时候设置。另见\u003ca href=\"/docs/18/auth-username-maps.html\" title=\"20.2. 用户名映射\"\u003e第 20.2 节\u003c/a\u003e。\u003c/p\u003e","doc_same_as":""}},"RequestedLocale":"zh-Hans","Fallback":false,"Versions":["10","11","12","13","14","15","16","17","18","19","20","8.0","8.1","8.2","8.3","8.4","9.0","9.1","9.2","9.3","9.4","9.5","9.6"],"Locales":["en","zh-Hans"],"Signatures":null,"Spellings":null,"SQLState":null,"Evidence":null}