STATISTICS VIEW · 统计视图

pg_stat_replication_slots

The pg_stat_replication_slots view will contain one row per logical replication slot, showing statistics about its usage.

首次收录 PG 14最近收录 PG 19当前字段 10

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_replication_slots

字段 / COLUMN	类型 / TYPE	说明 / DESCRIPTION
`slot_name`	`text`	A unique, cluster-wide identifier for the replication slot
`spill_txns`	`bigint`	Number of transactions spilled to disk once the memory used by logical decoding to decode changes from WAL has exceeded logical_decoding_work_mem. The counter gets incremented for both top-level transactions and subtransactions.
`spill_count`	`bigint`	Number of times transactions were spilled to disk while decoding changes from WAL for this slot. This counter is incremented each time a transaction is spilled, and the same transaction may be spilled multiple times.
`spill_bytes`	`bigint`	Amount of decoded transaction data spilled to disk while performing decoding of changes from WAL for this slot. This and other spill counters can be used to gauge the I/O which occurred during logical decoding and allow tuning logical_decoding_work_mem.
`stream_txns`	`bigint`	Number of in-progress transactions streamed to the decoding output plugin after the memory used by logical decoding to decode changes from WAL for this slot has exceeded logical_decoding_work_mem. Streaming only works with top-level transactions (subtransactions can't be streamed independently), so the counter is not incremented for subtransactions.
`stream_count`	`bigint`	Number of times in-progress transactions were streamed to the decoding output plugin while decoding changes from WAL for this slot. This counter is incremented each time a transaction is streamed, and the same transaction may be streamed multiple times.
`stream_bytes`	`bigint`	Amount of transaction data decoded for streaming in-progress transactions to the decoding output plugin while decoding changes from WAL for this slot. This and other streaming counters for this slot can be used to tune logical_decoding_work_mem.
`total_txns`	`bigint`	Number of decoded transactions sent to the decoding output plugin for this slot. This counts top-level transactions only, and is not incremented for subtransactions. Note that this includes the transactions that are streamed and/or spilled.
`total_bytes`	`bigint`	Amount of transaction data decoded for sending transactions to the decoding output plugin while decoding changes from WAL for this slot. Note that this includes data that is streamed and/or spilled.
`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	9.4	9.5	9.6	10	11	12	13	14	15	16	17	18
`slot_name`	–	–	–	–	–	–	–	–	–	–	–
`spill_txns`	–	–	–	–	–	–	–	–	–	–	–
`spill_count`	–	–	–	–	–	–	–	–	–	–	–
`spill_bytes`	–	–	–	–	–	–	–	–	–	–	–
`stream_txns`	–	–	–	–	–	–	–	–	–	–	–
`stream_count`	–	–	–	–	–	–	–	–	–	–	–
`stream_bytes`	–	–	–	–	–	–	–	–	–	–	–
`total_txns`	–	–	–	–	–	–	–	–	–	–	–
`total_bytes`	–	–	–	–	–	–	–	–	–	–	–
`stats_reset`	–	–	–	–	–	–	–	–	–	–	–
`mem_exceeded_count`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`slotsync_skip_count`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`slotsync_last_skip`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–

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

+ mem_exceeded_count+ slotsync_skip_count+ slotsync_last_skip

PostgreSQL 14 ← 13新增目录

+ slot_name+ spill_txns+ spill_count+ spill_bytes+ stream_txns+ stream_count+ stream_bytes+ total_txns+ total_bytes+ 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。