Horton

Add GUC option to control maximum active replication origins.

Masahiko Sawada <msawada@postgresql.org>

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Commit: 04ff636cbce4b91fba1f334e1bc0dc88686e7b2d
Author: Masahiko Sawada <msawada@postgresql.org>
Date: 2025-03-21T19:20:15Z
Releases: 18.0 
Add GUC option to control maximum active replication origins.

This commit introduces a new GUC option max_active_replication_origins
to control the maximum number of active replication
origins. Previously, this was controlled by
'max_replication_slots'. Having a separate GUC option provides better
flexibility for setting up subscribers, as they may not require
replication slots (for cascading replication) but always require
replication origins.

Author: Euler Taveira <euler@eulerto.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Reviewed-by: vignesh C <vignesh21@gmail.com>
Discussion: https://postgr.es/m/b81db436-8262-4575-b7c4-bc0c1551000b@app.fastmail.com

Files

PathChange+/−
doc/src/sgml/config.sgml modified +7 −19
doc/src/sgml/logical-replication.sgml modified +4 −6
doc/src/sgml/ref/pg_createsubscriber.sgml modified +1 −1
src/backend/replication/logical/launcher.c modified +3 −3
src/backend/replication/logical/origin.c modified +31 −35
src/backend/utils/misc/guc_tables.c modified +12 −0
src/backend/utils/misc/postgresql.conf.sample modified +2 −0
src/bin/pg_basebackup/pg_createsubscriber.c modified +10 −10
src/bin/pg_basebackup/t/040_pg_createsubscriber.pl modified +2 −2
src/bin/pg_upgrade/check.c modified +9 −9
src/bin/pg_upgrade/t/004_subscription.pl modified +9 −8
src/include/replication/origin.h modified +3 −0

Documentation touched

Discussion