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base repository: postgresql-cfbot/postgresql
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  • 2 commits
  • 7 files changed
  • 2 contributors

Commits on Dec 15, 2025

  1. Introduce a new GUC 'wal_sender_shutdown_mode'. 

    Previously, at shutdown, walsender processes were always waiting to send all
pending data and ensure that all data is flushed in remote node. But in some cases
an unexpected wait may be unacceptable. For example, in logical replication,
apply_workers may hang on locks for some time, excluding the possibility of
sender's shutdown.

New guc allows to change shutdown mode of walsenders without changing
default behavior.

The shutdown modes are:

1) 'wait_flush' (the default). In this mode, the walsender will wait for all
WALs to be flushed on the receiver side, before exiting the process.

2) 'immediate'. In this mode, the walsender will exit without confirming the
remote flush. This may break the consistency between sender and receiver.
This mode might be useful for a system that has a high-latency network (to
reduce the amount of time for shutdown), or to allow the shutdown of
publisher even when when the subscriber's apply_worker is waiting for any
locks to be released.

Author: Andrey Silitskiy
Co-authored by: Hayato Kuroda
Discussion: https://postgr.es/m/TYAPR01MB586668E50FC2447AD7F92491F5E89%40TYAPR01MB5866.jpnprd01.prod.outlook.com
    a.silitskiy authored and Commitfest Bot committed Dec 15, 2025
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  2. [CF 6234] v2 - Introduce a new GUC to allow logical walsender to shut… 

    …down immediately without waiting for a response from the client.

This branch was automatically generated by a robot using patches from an
email thread registered at:

https://commitfest.postgresql.org/patch/6234

The branch will be overwritten each time a new patch version is posted to
the thread, and also periodically to check for bitrot caused by changes
on the master branch.

Patch(es): https://www.postgresql.org/message-id/[email protected]
Author(s): Andrey Silitskiy
    Commitfest Bot committed Dec 15, 2025
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