STATISTICS VIEW · 统计视图

pg_stat_wal

The pg_stat_wal view will always have a single row, containing data about WAL activity of the cluster.

首次收录 PG 14最近收录 PG 19当前字段 5

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_wal

字段 / COLUMN	类型 / TYPE	说明 / DESCRIPTION
`wal_records`	`bigint`	Total number of WAL records generated
`wal_fpi`	`bigint`	Total number of WAL full page images generated
`wal_bytes`	`numeric`	Total amount of WAL generated in bytes
`wal_buffers_full`	`bigint`	Number of times WAL data was written to disk because WAL buffers became full
`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。

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	19
`wal_records`	–	–	–	–	–	–	–	–	–	–	–
`wal_fpi`	–	–	–	–	–	–	–	–	–	–	–
`wal_bytes`	–	–	–	–	–	–	–	–	–	–	–
`wal_buffers_full`	–	–	–	–	–	–	–	–	–	–	–
`wal_write`	–	–	–	–	–	–	–	–	–	–	–					−	–
`wal_sync`	–	–	–	–	–	–	–	–	–	–	–					−	–
`wal_write_time`	–	–	–	–	–	–	–	–	–	–	–					−	–
`wal_sync_time`	–	–	–	–	–	–	–	–	–	–	–					−	–
`stats_reset`	–	–	–	–	–	–	–	–	–	–	–
`wal_fpi_bytes`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–

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。

相邻大版本的变化

PostgreSQL 19 ← 18

+ wal_fpi_bytes

PostgreSQL 18 ← 17

− wal_write− wal_sync− wal_write_time− wal_sync_time

PostgreSQL 17 ← 16

2 处字段说明更新

PostgreSQL 14 ← 13新增目录

+ wal_records+ wal_fpi+ wal_bytes+ wal_buffers_full+ wal_write+ wal_sync+ wal_write_time+ wal_sync_time+ stats_reset

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。