Re: synchronized_standby_slots behavior inconsistent with quorum-based synchronous replication

Ashutosh Sharma <ashu.coek88@gmail.com>

From: Ashutosh Sharma <ashu.coek88@gmail.com>

To: shveta malik <shveta.malik@gmail.com>

Cc: Amit Kapila <amit.kapila16@gmail.com>, Hou, Zhijie/侯志杰 <houzj.fnst@fujitsu.com>, Ajin Cherian <itsajin@gmail.com>, SATYANARAYANA NARLAPURAM <satyanarlapuram@gmail.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>, shveta malik <shvetamalik@gmail.com>

Date: 2026-05-21T09:12:15Z

Lists: pgsql-hackers

Hi Shveta,

On Fri, May 15, 2026 at 9:28 AM shveta malik <shveta.malik@gmail.com> wrote:
>
> Ashutosh, while testing further, I noticed that
> 'synchronized_standby_slots' does not filter duplicate entries. As an
> example, if user ends up giving one entry twice in priority
> configuration, then we will end up waiting on one slot twice rather
> than waiting on 2 different slots.
>

Thank you for raising this concern. It is indeed an issue that needs
fixing. We will ensure it is addressed in the next patch version.

--
With Regards,
Ashutosh Sharma.