Re: Should we add debug_parallel_query=regress to CI?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Andres Freund <andres(at)anarazel(dot)de>
Cc: Peter Geoghegan <pg(at)bowt(dot)ie>, Robert Haas <robertmhaas(at)gmail(dot)com>, Matthias van de Meent <boekewurm+postgres(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Should we add debug_parallel_query=regress to CI?
Date: 2025-03-05 16:19:46
Message-ID: 313859.1741191586@sss.pgh.pa.us
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Andres Freund <andres(at)anarazel(dot)de> writes:
> Post-commit issues due to debug_parallel_query=regress seem rather common,
> surely not helped by CI/cfbot not flagging them. I wonder if we ought to make
> one of the CI tasks use debug_parallel_query=regress, to avoid that problem?

Yeah, it certainly seems like a test coverage gap. However, we seem to
be moving towards a situation where each type of CI run is a special
snowflake that differs in multiple dimensions from other types.
That might make it difficult to figure out which dimension is
responsible for a particular failure.

(OTOH, the same can be said of the buildfarm, and we've survived
regardless. So maybe I'm worried over nothing.)

regards, tom lane

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