{"Entry":{"collection":"metric","key":"pg_stat_progress_vacuum-num_dead_item_ids","name":"pg_stat_progress_vacuum.num_dead_item_ids","aliases":["num_dead_item_ids","pg_stat_progress_vacuum"],"metadata":{"aliases":["num_dead_item_ids","pg_stat_progress_vacuum"],"category":"pg_stat_progress_vacuum","content_hash":"dfea83dada77679696a5be64fcea102f8d697222380d8942dafc50d9e65ce37b","derived_content_hash":"03950b11c83299900410b0523160941163197a8fc1ff5e502e2ef511149c5011","imported_at":"2026-09-30T00:40:45.991735+08:00","name":"pg_stat_progress_vacuum.num_dead_item_ids","name_zh":"","slug":"pg_stat_progress_vacuum-num_dead_item_ids","summary":"Number of dead item identifiers collected since the last index vacuum cycle."}},"Definition":{"Collection":"metric","Key":"pg_stat_progress_vacuum-num_dead_item_ids","SourceDatabase":"center","Version":"18","SourceTable":"statistics_metric","SourceKey":"pg_stat_progress_vacuum-num_dead_item_ids","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","Facts":{"comparison_data":{"field":"num_dead_item_ids","sql_type":"bigint","units_mentioned":[],"view":"pg_stat_progress_vacuum"},"comparison_hash":"08e95d03c0f87f56fe28f18a2a9a8064d16f80d3a0353126a07a490a2fe1a7c3","description":["Number of dead item identifiers collected since the last index vacuum cycle."],"description_zh":"自上一个索引清理周期以来收集到的死项标识符数量。","description_zh_html":"\u003cp\u003epg_stat_progress_vacuum.num_dead_item_ids 统计字段。\u003c/p\u003e\u003cdl\u003e\u003cdt\u003e视图\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003epg_stat_progress_vacuum\u003c/code\u003e\u003c/dd\u003e\u003cdt\u003e字段\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003enum_dead_item_ids\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自上一个索引清理周期以来收集到的死项标识符数量。\u003c/p\u003e\u003cp\u003e\u003ca href=\"/zh/docs/18/progress-reporting.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_progress_vacuum"},{"label":"Field","value":"num_dead_item_ids"},{"label":"SQL type","value":"bigint"},{"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_progress_vacuum"},{"label":"字段","value":"num_dead_item_ids"},{"label":"SQL 类型","value":"bigint"},{"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":"num_dead_item_ids","manual_html":"","manual_path":"/docs/18/progress-reporting.html","related":[{"label":"pg_stat_progress_vacuum columns","url":"/wiki/catalog/pg_stat_progress_vacuum/?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":["Whenever VACUUM is running, the pg_stat_progress_vacuum view will contain one row for each backend (including autovacuum worker processes) that is currently vacuuming. 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