Re: BUG #18988: DROP SUBSCRIPTION locks not-yet-accessed database

From: Dilip Kumar <dilipbalaut(at)gmail(dot)com>
To: vignesh C <vignesh21(at)gmail(dot)com>
Cc: Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Álvaro Herrera <alvherre(at)kurilemu(dot)de>, "Hayato Kuroda (Fujitsu)" <kuroda(dot)hayato(at)fujitsu(dot)com>, "exclusion(at)gmail(dot)com" <exclusion(at)gmail(dot)com>, "pgsql-bugs(at)lists(dot)postgresql(dot)org" <pgsql-bugs(at)lists(dot)postgresql(dot)org>
Subject: Re: BUG #18988: DROP SUBSCRIPTION locks not-yet-accessed database
Date: 2025-08-18 07:25:09
Message-ID: CAFiTN-so4YSQ_4KaorRRhQLdGv9cNqOkO4fKJyrd9T=KAO5URA@mail.gmail.com
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On Mon, Aug 18, 2025 at 11:36 AM Dilip Kumar <dilipbalaut(at)gmail(dot)com> wrote:
>
> On Mon, Aug 18, 2025 at 9:04 AM vignesh C <vignesh21(at)gmail(dot)com> wrote:
> > This change will run not just the newly added test, but the entire
> > regression suite under the new configuration. Should we consider
> > moving this test elsewhere such as into the 100_bugs:
> > diff --git a/src/bin/pg_upgrade/t/002_pg_upgrade.pl
> > b/src/bin/pg_upgrade/t/002_pg_upgrade.pl
> > index 4b5e895809b..284b2ef07e0 100644
> > --- a/src/bin/pg_upgrade/t/002_pg_upgrade.pl
> > +++ b/src/bin/pg_upgrade/t/002_pg_upgrade.pl
> > @@ -225,6 +225,8 @@ $oldnode->init(%old_node_params);
> > # Override log_statement=all set by Cluster.pm. This avoids large amounts
> > # of log traffic that slow this test down even more when run under valgrind.
> > $oldnode->append_conf('postgresql.conf', 'log_statement = none');
> > +$oldnode->append_conf('postgresql.conf', 'wal_level = replica');
> > +$oldnode->append_conf('postgresql.conf', 'max_wal_senders = 1');
>
> Yeah even I didn't like it to set wal_level to replica only for this
> test, it makes sense to write it in 100_bugs.pl, here is a updated
> patch for HEAD only, I have also updated the commit message, once we
> get agreement on this I will prepare a backbranch patches.
>

Updated test case, cleanup reported by 1) pgperltidy 2) dropped the
database post test and 3) changed subscription name

--
Regards,
Dilip Kumar
Google

Attachment Content-Type Size
v7-0001-Fix-DROP-SUBSCRIPTION-deadlock-with-walsender-pro.patch application/octet-stream 4.7 KB

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