| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Alexander Lakhin <exclusion(at)gmail(dot)com> |
| Cc: | Andres Freund <andres(at)anarazel(dot)de>, Peter Eisentraut <peter(at)eisentraut(dot)org>, Andrew Dunstan <andrew(at)dunslane(dot)net>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Regression tests fail on OpenBSD due to low semmns value |
| Date: | 2024-12-24 17:57:20 |
| Message-ID: | 1628710.1735063040@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Alexander Lakhin <exclusion(at)gmail(dot)com> writes:
> I've reproduced this behavior with two reduced sqls.
> prepared_xacts.sql:
> BEGIN TRANSACTION ISOLATION LEVEL SERIALIZABLE;
> CREATE TABLE pxtest4 (a int);
> PREPARE TRANSACTION 'regress_sub2';
> \c -
> COMMIT PREPARED 'regress_sub2';
> -- the script ends prematurely and doesn't reach COMMIT when \c fails due
> -- to the "too many clients" error.
Hmm, okay. Not really a bug, or at least I don't see much we could
do about it.
It does seem odd that a prepared transaction --- which, at least
in theory, we should know won't do anything more --- can block
other serializable transactions. Maybe that could be improved,
but it sounds like a research project not a bug fix.
regards, tom lane
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