STATISTICS VIEW · 统计视图

pg_stat_sys_tables

Same as pg_stat_all_tables, except that only system tables are shown.

首次收录 PG 9.0最近收录 PG 19当前字段 30

9.0 9.1 9.2 9.3 9.4 9.5 9.6 10 11 12 13 14 15 16 17 18 19^β3

已与 PostgreSQL 18.6 实例逐字段核对 · 原始实测记录 ↗

字段结构 PostgreSQL 18

pg_stat_sys_tables

字段 / COLUMN	类型 / TYPE	说明 / DESCRIPTION
`relid`	`oid`	OID of a table
`schemaname`	`name`	Name of the schema that this table is in
`relname`	`name`	Name of this table
`seq_scan`	`bigint`	Number of sequential scans initiated on this table
`last_seq_scan`	`timestamp with time zone`	The time of the last sequential scan on this table, based on the most recent transaction stop time
`seq_tup_read`	`bigint`	Number of live rows fetched by sequential scans
`idx_scan`	`bigint`	Number of index scans initiated on this table
`last_idx_scan`	`timestamp with time zone`	The time of the last index scan on this table, based on the most recent transaction stop time
`idx_tup_fetch`	`bigint`	Number of live rows fetched by index scans
`n_tup_ins`	`bigint`	Total number of rows inserted
`n_tup_upd`	`bigint`	Total number of rows updated. (This includes row updates counted in n_tup_hot_upd and n_tup_newpage_upd, and remaining non-HOT updates.)
`n_tup_del`	`bigint`	Total number of rows deleted
`n_tup_hot_upd`	`bigint`	Number of rows HOT updated. These are updates where no successor versions are required in indexes.
`n_tup_newpage_upd`	`bigint`	Number of rows updated where the successor version goes onto a new heap page, leaving behind an original version with a t_ctid field that points to a different heap page. These are always non-HOT updates.
`n_live_tup`	`bigint`	Estimated number of live rows
`n_dead_tup`	`bigint`	Estimated number of dead rows
`n_mod_since_analyze`	`bigint`	Estimated number of rows modified since this table was last analyzed
`n_ins_since_vacuum`	`bigint`	Estimated number of rows inserted since this table was last vacuumed (not counting VACUUM FULL)
`last_vacuum`	`timestamp with time zone`	Last time at which this table was manually vacuumed (not counting VACUUM FULL)
`last_autovacuum`	`timestamp with time zone`	Last time at which this table was vacuumed by the autovacuum daemon
`last_analyze`	`timestamp with time zone`	Last time at which this table was manually analyzed
`last_autoanalyze`	`timestamp with time zone`	Last time at which this table was analyzed by the autovacuum daemon
`vacuum_count`	`bigint`	Number of times this table has been manually vacuumed (not counting VACUUM FULL)
`autovacuum_count`	`bigint`	Number of times this table has been vacuumed by the autovacuum daemon
`analyze_count`	`bigint`	Number of times this table has been manually analyzed
`autoanalyze_count`	`bigint`	Number of times this table has been analyzed by the autovacuum daemon
`total_vacuum_time`	`double precision`	Total time this table has been manually vacuumed, in milliseconds (not counting VACUUM FULL). (This includes the time spent sleeping due to cost-based delays.)
`total_autovacuum_time`	`double precision`	Total time this table has been vacuumed by the autovacuum daemon, in milliseconds. (This includes the time spent sleeping due to cost-based delays.)
`total_analyze_time`	`double precision`	Total time this table has been manually analyzed, in milliseconds. (This includes the time spent sleeping due to cost-based delays.)
`total_autoanalyze_time`	`double precision`	Total time this table has been analyzed by the autovacuum daemon, in milliseconds. (This includes the time spent sleeping due to cost-based delays.)

标记“隐式列”的字段不包含在 SELECT * 中；部分早期统计视图由同版本源码补全，额外来源会显示在字段说明中。

字段演化矩阵

悬停查看字段类型

存在新增 / 类型或属性变化移除

字段 / COLUMN	9.0	9.1	9.2	9.3	9.4	9.5	9.6	10	11	12	13	14	15	16	17	18
`relid`
`schemaname`
`relname`
`seq_scan`
`seq_tup_read`
`idx_scan`
`idx_tup_fetch`
`n_tup_ins`
`n_tup_upd`
`n_tup_del`
`n_tup_hot_upd`
`n_live_tup`
`n_dead_tup`
`last_vacuum`
`last_autovacuum`
`last_analyze`
`last_autoanalyze`
`vacuum_count`	–
`autovacuum_count`	–
`analyze_count`	–
`autoanalyze_count`	–
`n_mod_since_analyze`	–	–	–	–
`n_ins_since_vacuum`	–	–	–	–	–	–	–	–	–	–
`last_seq_scan`	–	–	–	–	–	–	–	–	–	–	–	–	–
`last_idx_scan`	–	–	–	–	–	–	–	–	–	–	–	–	–
`n_tup_newpage_upd`	–	–	–	–	–	–	–	–	–	–	–	–	–
`total_vacuum_time`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`total_autovacuum_time`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`total_analyze_time`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`total_autoanalyze_time`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`stats_reset`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–

9.0 是收录基线；基线中已存在的字段不标记为新增。矩阵按字段名称对齐，重命名显示为旧字段移除与新字段新增。

演化时间线

相邻大版本的变化

PostgreSQL 19 ← 18

+ stats_reset

PostgreSQL 18 ← 17

+ total_vacuum_time+ total_autovacuum_time+ total_analyze_time+ total_autoanalyze_time1 处字段说明更新

PostgreSQL 16 ← 15

+ last_seq_scan+ last_idx_scan+ n_tup_newpage_upd4 处字段说明更新

PostgreSQL 13 ← 12

+ n_ins_since_vacuum

PostgreSQL 9.5 ← 9.4

1 处字段说明更新

PostgreSQL 9.4 ← 9.3

+ n_mod_since_analyze

PostgreSQL 9.2 ← 9.1

2 处字段说明更新目录说明更新

PostgreSQL 9.1 ← 9.0

+ vacuum_count+ autovacuum_count+ analyze_count+ autoanalyze_count

比较任意两个版本

起始版本 / FROM目标版本 / TO包含描述更新

选择两个版本，查看字段的新增、移除与类型变化。交互比较需要 JavaScript；演化时间线可直接阅读。