{"Entry":{"collection":"metric","key":"pg_stat_user_tables-n_live_tup","name":"pg_stat_user_tables.n_live_tup","aliases":["n_live_tup","pg_stat_user_tables"],"metadata":{"aliases":["n_live_tup","pg_stat_user_tables"],"category":"pg_stat_user_tables","content_hash":"fc65d86297bdfc38bf09fc2b0c5b96a8f53b5c9ea8f3f11bd224f41b028e1ceb","derived_content_hash":"42dabf97612cdb23d62b62e7044790033b4d088792adf4e73157c1c29cfe3b33","imported_at":"2026-09-30T00:40:46.426426+08:00","name":"pg_stat_user_tables.n_live_tup","name_zh":"","slug":"pg_stat_user_tables-n_live_tup","summary":"Estimated number of live rows"}},"Definition":{"Collection":"metric","Key":"pg_stat_user_tables-n_live_tup","SourceDatabase":"center","Version":"18","SourceTable":"statistics_metric","SourceKey":"pg_stat_user_tables-n_live_tup","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","Facts":{"comparison_data":{"field":"n_live_tup","sql_type":"bigint","units_mentioned":["rows"],"view":"pg_stat_user_tables"},"comparison_hash":"3126d5a98c209700db338de80bdbac46d4609a7ef8106c833e5be694eb4e5bf9","description":["Estimated number of live rows"],"description_zh":"活的行的估计数量","description_zh_html":"\u003cp\u003epg_stat_user_tables.n_live_tup 统计字段。\u003c/p\u003e\u003cdl\u003e\u003cdt\u003e视图\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003epg_stat_user_tables\u003c/code\u003e\u003c/dd\u003e\u003cdt\u003e字段\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003en_live_tup\u003c/code\u003e\u003c/dd\u003e\u003cdt\u003eSQL 类型\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003ebigint\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活的行的估计数量\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_user_tables"},{"label":"Field","value":"n_live_tup"},{"label":"SQL type","value":"bigint"},{"label":"Units named in the field definition","value":"rows"},{"label":"Reset observation","value":"No stats_reset field is documented for this view"}],"facts_zh":[{"label":"视图","value":"pg_stat_user_tables"},{"label":"字段","value":"n_live_tup"},{"label":"SQL 类型","value":"bigint"},{"label":"字段定义记载的单位","value":"rows"},{"label":"重置条件","value":"手册未为此视图记载 stats_reset 字段"}],"field":"n_live_tup","manual_html":"","manual_path":"/docs/18/monitoring-stats.html","related":[{"label":"pg_stat_user_tables columns","url":"/wiki/catalog/pg_stat_user_tables/?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":["Same as pg_stat_all_tables, except that only user tables are shown."],"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 n_live_tup FROM pg_catalog.pg_stat_user_tables;","paragraphs":["Example query; no execution result or measured value is asserted."],"title":"Inspect this field"}],"sections_zh":[{"paragraphs":["与 pg_stat_all_tables 相同，但仅显示用户表。"],"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 n_live_tup FROM pg_catalog.pg_stat_user_tables;","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 n_live_tup FROM pg_catalog.pg_stat_user_tables;","source_only":false,"sources":[{"label":"PostgreSQL 18 English manual","path":"monitoring-stats.html","sha256":"aa979eed08627fbf715a9d792094a162a73671db5af810f3ab2aad3e073d5722","url":"/docs/18/monitoring-stats.html#id-1.6.14.7.6.8.2.2.13.1.2"}],"sql_type":"bigint","tables":[],"tables_zh":[],"units_mentioned":["rows"],"view":"pg_stat_user_tables","zh_from":{"authored_translation":"source-derived-structured-summary","body_sha256":"f78c8cfc64a7c9463c8743e33c6b336b891ad60872108cb1ee382c2e7a043b15","kind":"same-version-chinese-manual-with-source-derived-structured-summary","manual":{"anchor":"","build_id":107,"column":"n_live_tup","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#id-1.6.14.7.6.8.2.2.13.1.2"}]},"MeasuredEvidence":{}},"Text":{"Collection":"metric","Key":"pg_stat_user_tables-n_live_tup","SourceDatabase":"center","Version":"18","Locale":"en","Title":"pg_stat_user_tables.n_live_tup","Summary":"Estimated number of live rows","BodyHTML":"\u003cp\u003eEstimated number of live rows\u003c/p\u003e","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","ContentHash":"85685463d0fb722b92cee7d3f3aff2ab91194b00b03638b6d4a162cea85d5eb8","Payload":{"description":["Estimated number of live rows"],"manual_html":"","related":[{"label":"pg_stat_user_tables columns","url":"/wiki/catalog/pg_stat_user_tables/?v=18"},{"label":"Statistics collection and reset functions","url":"/docs/18/monitoring-stats.html"}],"sections":[{"paragraphs":["Same as pg_stat_all_tables, except that only user tables are shown."],"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 n_live_tup FROM pg_catalog.pg_stat_user_tables;","paragraphs":["Example query; no execution result or measured value is asserted."],"title":"Inspect this field"}],"tables":[]}},"RequestedLocale":"en","Fallback":false,"Versions":["10","11","12","13","14","15","16","17","18","19","20"],"Locales":["en","zh-Hans"],"Signatures":null,"Spellings":null,"SQLState":null,"Evidence":null}