Horton

Add slotsync skip statistics.

Amit Kapila <akapila@postgresql.org>

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Commit: 76b78721ca49c16dfcbfbd2f4f87fcdb2db2bbb6
Author: Amit Kapila <akapila@postgresql.org>
Date: 2025-11-25T07:06:02Z
Releases: 19 (unreleased) 
Add slotsync skip statistics.

This patch adds two new columns to the pg_stat_replication_slots view:
slotsync_skip_count - the total number of times a slotsync operation was
skipped.
slotsync_skip_at - the timestamp of the most recent skip.

These additions provide better visibility into replication slot
synchronization behavior.

A future patch will introduce the slotsync_skip_reason column in
pg_replication_slots to capture the reason for skip.

Author: Shlok Kyal <shlok.kyal.oss@gmail.com>
Reviewed-by: shveta malik <shveta.malik@gmail.com>
Reviewed-by: Hayato Kuroda <kuroda.hayato@fujitsu.com>
Reviewed-by: Ashutosh Sharma <ashu.coek88@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Discussion: https://postgr.es/m/CAE9k0PkhfKrTEAsGz4DjOhEj1nQ+hbQVfvWUxNacD38ibW3a1g@mail.gmail.com

Files

PathChange+/−
contrib/test_decoding/expected/stats.out modified +6 −6
doc/src/sgml/monitoring.sgml modified +24 −0
src/backend/catalog/system_views.sql modified +2 −0
src/backend/replication/logical/slotsync.c modified +66 −23
src/backend/utils/activity/pgstat_replslot.c modified +31 −1
src/backend/utils/adt/pgstatfuncs.c modified +14 −4
src/include/catalog/catversion.h modified +1 −1
src/include/catalog/pg_proc.dat modified +3 −3
src/include/pgstat.h modified +4 −1
src/test/recovery/t/040_standby_failover_slots_sync.pl modified +58 −2
src/test/regress/expected/rules.out modified +3 −1

Discussion