STATISTICS VIEW · 统计视图

pg_stat_archiver

The pg_stat_archiver view will always have a single row, containing data about the archiver process of the cluster. Normally, WAL files are archived in order, oldest to newest, but that is not guaranteed, and does not hold under special circumstances like when promoting a standby or after crash recovery. Therefore it is not safe to assume that all files older than last_archived_wal have also been successfully archived.

首次收录 PG 9.4最近收录 PG 19当前字段 7

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_archiver

字段 / COLUMN	类型 / TYPE	说明 / DESCRIPTION
`archived_count`	`bigint`	Number of WAL files that have been successfully archived
`last_archived_wal`	`text`	Name of the WAL file most recently successfully archived
`last_archived_time`	`timestamp with time zone`	Time of the most recent successful archive operation
`failed_count`	`bigint`	Number of failed attempts for archiving WAL files
`last_failed_wal`	`text`	Name of the WAL file of the most recent failed archival operation
`last_failed_time`	`timestamp with time zone`	Time of the most recent failed archival operation
`stats_reset`	`timestamp with time zone`	Time at which these statistics were last reset

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
`archived_count`	–	–	–	–
`last_archived_wal`	–	–	–	–
`last_archived_time`	–	–	–	–
`failed_count`	–	–	–	–
`last_failed_wal`	–	–	–	–
`last_failed_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 15 ← 14

4 处字段说明更新目录说明更新

PostgreSQL 13 ← 12

目录说明更新

PostgreSQL 12 ← 11

目录说明更新

PostgreSQL 10 ← 9.6

目录说明更新

PostgreSQL 9.6 ← 9.5

目录说明更新

PostgreSQL 9.5 ← 9.4

目录说明更新

PostgreSQL 9.4 ← 9.3新增目录

+ archived_count+ last_archived_wal+ last_archived_time+ failed_count+ last_failed_wal+ last_failed_time+ stats_reset

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。