Re: pgsql: Disable logical decoding after REPACK (CONCURRENTLY)

From: Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>
To: Alexander Korotkov <aekorotkov(at)gmail(dot)com>
Cc: Álvaro Herrera <alvherre(at)kurilemu(dot)de>, pgsql-committers(at)lists(dot)postgresql(dot)org
Subject: Re: pgsql: Disable logical decoding after REPACK (CONCURRENTLY)
Date: 2026-05-27 22:55:11
Message-ID: CAD21AoBVYs+Ob4aBHS3DKxw=2AKW_s7tjUURo4YrQig1vN-Bug@mail.gmail.com
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On Wed, May 27, 2026 at 1:09 PM Alexander Korotkov <aekorotkov(at)gmail(dot)com> wrote:
>
> Hi!
>
> On Wed, May 27, 2026 at 9:14 PM Álvaro Herrera <alvherre(at)kurilemu(dot)de> wrote:
> > Disable logical decoding after REPACK (CONCURRENTLY)
> >
> > REPACK (CONCURRENTLY) uses a temporary logical replication slot, which
> > is dropped once done, but it wasn't calling RequestDisableLogicalDecoding(),
> > leaving effective_wal_level stuck at 'logical'.
> >
> > Fix by adding a Boolean flag to ReplicationSlotDropAcquired() to have it
> > request to disable logical decoding, and passing it as true on REPACK.
> > Other callers of that function preserve their existing behavior.
> >
> > Author: Imran Zaheer <imran(dot)zhir(at)gmail(dot)com>
> > Reviewed-by: shveta malik <shveta(dot)malik(at)gmail(dot)com>
> > Discussion: https://postgr.es/m/CA+UBfaktds57dw2M8BEv_kS-=ixph3w+3MxKixtaDQMi_k7Ybg@mail.gmail.com
>
> This seams to cause buildfarm failures, for instance
> https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=loach&dt=2026-05-27%2018%3A25%3A00
>

I've just pushed the fix (47ad2233fad) and hope it makes buildfarm
members happy.

Regards,

--
Masahiko Sawada
Amazon Web Services: https://aws.amazon.com

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