{"Entry":{"collection":"metric","key":"pg_stat_activity-leader_pid","name":"pg_stat_activity.leader_pid","aliases":["leader_pid","pg_stat_activity"],"metadata":{"aliases":["leader_pid","pg_stat_activity"],"category":"pg_stat_activity","content_hash":"d48f4848cb40e6912a2f5d9ea9d5068845446661ff998f2a44ed34cec5158557","derived_content_hash":"9d83a7365b017e129c8cf1b49f5750c5c812f54750e700aec9ee9eee047f7d54","imported_at":"2026-09-30T00:40:45.273178+08:00","name":"pg_stat_activity.leader_pid","name_zh":"","slug":"pg_stat_activity-leader_pid","summary":"Process ID of the parallel group leader if this process is a parallel query worker, or process ID of the leader apply worker if this process is a parallel apply worker. NULL indicates that this process is a parallel group leader or leader apply worker, or does not participate in any parallel operation."}},"Definition":{"Collection":"metric","Key":"pg_stat_activity-leader_pid","SourceDatabase":"center","Version":"18","SourceTable":"statistics_metric","SourceKey":"pg_stat_activity-leader_pid","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","Facts":{"comparison_data":{"field":"leader_pid","sql_type":"integer","units_mentioned":[],"view":"pg_stat_activity"},"comparison_hash":"f89284edc4852ed2535d67bc526c03b7de3fdfbfd87ef7a05ab41ef7a3187ebf","description":["Process ID of the parallel group leader if this process is a parallel query worker, or process ID of the leader apply worker if this process is a parallel apply worker. NULL indicates that this process is a parallel group leader or leader apply worker, or does not participate in any parallel operation."],"description_zh":"如果该进程是并行查询工作进程，则为并行组领导者的进程 ID；如果该进程是并行应用工作进程，则为领导者应用工作进程的进程 ID。NULL 表示该进程是并行组领导者或领导者应用工作进程，或者不参与任何并行操作。","description_zh_html":"\u003cp\u003epg_stat_activity.leader_pid 统计字段。\u003c/p\u003e\u003cdl\u003e\u003cdt\u003e视图\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003epg_stat_activity\u003c/code\u003e\u003c/dd\u003e\u003cdt\u003e字段\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003eleader_pid\u003c/code\u003e\u003c/dd\u003e\u003cdt\u003eSQL 类型\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003einteger\u003c/code\u003e\u003c/dd\u003e\u003c/dl\u003e\u003ch3\u003e同版本中文手册定义\u003c/h3\u003e\u003cp\u003e如果该进程是并行查询工作进程，则为并行组领导者的进程 ID；如果该进程是并行应用工作进程，则为领导者应用工作进程的进程 ID。NULL 表示该进程是并行组领导者或领导者应用工作进程，或者不参与任何并行操作。\u003c/p\u003e\u003cp\u003e\u003ca href=\"/zh/docs/18/monitoring-stats.html#\"\u003e查看完整中文手册与上下文\u003c/a\u003e。\u003c/p\u003e","documented":true,"facts":[{"label":"View","value":"pg_stat_activity"},{"label":"Field","value":"leader_pid"},{"label":"SQL type","value":"integer"},{"label":"Units named in the field definition","value":"Not specified"},{"label":"Reset observation","value":"No stats_reset field is documented for this view"}],"facts_zh":[{"label":"视图","value":"pg_stat_activity"},{"label":"字段","value":"leader_pid"},{"label":"SQL 类型","value":"integer"},{"label":"字段定义记载的单位","value":"未指定"},{"label":"重置条件","value":"手册未为此视图记载 stats_reset 字段"}],"field":"leader_pid","manual_html":"","manual_path":"/docs/18/monitoring-stats.html","related":[{"label":"pg_stat_activity columns","url":"/wiki/catalog/pg_stat_activity/?v=18"},{"label":"Statistics collection and reset functions","url":"/docs/18/monitoring-stats.html"}],"release":{"channel":"stable","label":"18.6","major":"18","ref":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","revision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"},"sections":[{"paragraphs":["The pg_stat_activity view will have one row per server process, showing information related to the current activity of that process."],"title":"View semantics"},{"paragraphs":["Read the same-version statistics collection and view documentation below for reset scope and visibility. No per-field reset rule is inferred from the field name."],"title":"Collection and reset context"},{"code":"SELECT leader_pid FROM pg_catalog.pg_stat_activity;","paragraphs":["Example query; no execution result or measured value is asserted."],"title":"Inspect this field"}],"sections_zh":[{"paragraphs":["pg_stat_activity 视图每个服务器进程将有一行，显示与该进程当前活动相关的信息。"],"title":"视图语义"},{"paragraphs":["重置范围和可见性请参阅下方同版本的统计信息收集与视图文档。不根据字段名称推断各字段的重置规则。"],"title":"采集与重置语义"},{"code":"SELECT leader_pid FROM pg_catalog.pg_stat_activity;","paragraphs":["示例查询；不表示已执行，也不提供实测值。"],"title":"查看此字段"}],"signature":"SELECT leader_pid FROM pg_catalog.pg_stat_activity;","source_only":false,"sources":[{"label":"PostgreSQL 18 English manual","path":"monitoring-stats.html","sha256":"aa979eed08627fbf715a9d792094a162a73671db5af810f3ab2aad3e073d5722","url":"/docs/18/monitoring-stats.html#PG-STAT-ACTIVITY-VIEW"}],"sql_type":"integer","tables":[],"tables_zh":[],"units_mentioned":[],"view":"pg_stat_activity","zh_from":{"authored_translation":"source-derived-structured-summary","body_sha256":"0044dfa9b67e0f07f1d8054618b7efab51e95aaea09f2df4996e30196a7c5517","kind":"same-version-chinese-manual-with-source-derived-structured-summary","manual":{"anchor":"","build_id":107,"column":"leader_pid","extraction":"exact-catalog-field","locale":"zh-Hans","page_key":"monitoring-stats.html","source_hash":"0274aac7991450316bcf7be44635653b6d896fb00e321242c1b6674cb05c2e53","source_revision":"unknown:rendered-translation-baseline","translation_revision":"git:b1b500221dbe5437cfca004d6b04d3f6e422765d;html-sha256:08e987a66af27b98444a8057c256314eafa13611a3fb9e888214fc436824244b","url":"/zh/docs/18/monitoring-stats.html#","version":"18"},"runtime_rerun":false,"source_facts_revision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}},"ManualEvidence":{"manual_path":"/docs/18/monitoring-stats.html","release":{"channel":"stable","label":"18.6","major":"18","ref":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","revision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"},"sources":[{"label":"PostgreSQL 18 English manual","path":"monitoring-stats.html","sha256":"aa979eed08627fbf715a9d792094a162a73671db5af810f3ab2aad3e073d5722","url":"/docs/18/monitoring-stats.html#PG-STAT-ACTIVITY-VIEW"}]},"MeasuredEvidence":{}},"Text":{"Collection":"metric","Key":"pg_stat_activity-leader_pid","SourceDatabase":"center","Version":"18","Locale":"en","Title":"pg_stat_activity.leader_pid","Summary":"Process ID of the parallel group leader if this process is a parallel query worker, or process ID of the leader apply worker if this process is a parallel apply worker. NULL indicates that this process is a parallel group leader or leader apply worker, or does not participate in any parallel operation.","BodyHTML":"\u003cp\u003eProcess ID of the parallel group leader if this process is a parallel query worker, or process ID of the leader apply worker if this process is a parallel apply worker. NULL indicates that this process is a parallel group leader or leader apply worker, or does not participate in any parallel operation.\u003c/p\u003e","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","ContentHash":"bc65c3de9cff095f7a9f46b20aade41ed7721ca281ccbbf83a54811fef2cae21","Payload":{"description":["Process ID of the parallel group leader if this process is a parallel query worker, or process ID of the leader apply worker if this process is a parallel apply worker. NULL indicates that this process is a parallel group leader or leader apply worker, or does not participate in any parallel operation."],"manual_html":"","related":[{"label":"pg_stat_activity columns","url":"/wiki/catalog/pg_stat_activity/?v=18"},{"label":"Statistics collection and reset functions","url":"/docs/18/monitoring-stats.html"}],"sections":[{"paragraphs":["The pg_stat_activity view will have one row per server process, showing information related to the current activity of that process."],"title":"View semantics"},{"paragraphs":["Read the same-version statistics collection and view documentation below for reset scope and visibility. No per-field reset rule is inferred from the field name."],"title":"Collection and reset context"},{"code":"SELECT leader_pid FROM pg_catalog.pg_stat_activity;","paragraphs":["Example query; no execution result or measured value is asserted."],"title":"Inspect this field"}],"tables":[]}},"RequestedLocale":"en","Fallback":false,"Versions":["13","14","15","16","17","18","19","20"],"Locales":["en","zh-Hans"],"Signatures":null,"Spellings":null,"SQLState":null,"Evidence":null}