postgres-github.git / summary / log / commit / refs

commit    a8f45dee91768cf1447ffaf2527e499e75a194c3
Author:   Fujii Masao <fujii@postgresql.org>
Date:     Mon Apr 06 02:35:03 2026 +0000

    Add wal_sender_shutdown_timeout GUC to limit shutdown wait for replication
    
    Previously, during shutdown, walsenders always waited until all pending data
    was replicated to receivers. This ensures sender and receiver stay in sync
    after shutdown, which is important for physical replication switchovers,
    but it can significantly delay shutdown. For example, in logical replication,
    if apply workers are blocked on locks, walsenders may wait until those locks
    are released, preventing shutdown from completing for a long time.
    
    This commit introduces a new GUC, wal_sender_shutdown_timeout,
    which specifies the maximum time a walsender waits during shutdown for all
    pending data to be replicated. When set, shutdown completes once all data is
    replicated or the timeout expires. A value of -1 (the default) disables
    the timeout.
    
    This can reduce shutdown time when replication is slow or stalled. However,
    if the timeout is reached, the sender and receiver may be left out of sync,
    which can be problematic for physical replication switchovers.
    
    Author: Andrey Silitskiy <a.silitskiy@postgrespro.ru>
    Author: Hayato Kuroda <kuroda.hayato@fujitsu.com>
    Reviewed-by: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>
    Reviewed-by: Kyotaro Horiguchi <horikyota.ntt@gmail.com>
    Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
    Reviewed-by: Dilip Kumar <dilipbalaut@gmail.com>
    Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com>
    Reviewed-by: Andres Freund <andres@anarazel.de>
    Reviewed-by: Takamichi Osumi <osumi.takamichi@fujitsu.com>
    Reviewed-by: Peter Smith <smithpb2250@gmail.com>
    Reviewed-by: Greg Sabino Mullane <htamfids@gmail.com>
    Reviewed-by: Alexander Korotkov <aekorotkov@gmail.com>
    Reviewed-by: Vitaly Davydov <v.davydov@postgrespro.ru>
    Reviewed-by: Ronan Dunklau <ronan@dunklau.fr>
    Reviewed-by: Michael Paquier <michael@paquier.xyz>
    Reviewed-by: Japin Li <japinli@hotmail.com>
    Reviewed-by: Fujii Masao <masao.fujii@gmail.com>
    Discussion: https://postgr.es/m/TYAPR01MB586668E50FC2447AD7F92491F5E89@TYAPR01MB5866.jpnprd01.prod.outlook.com

[parent: 8194c4a9dd38]