Re: scalability bottlenecks with (many) partitions (and more)

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Andres Freund <andres(at)anarazel(dot)de>
Cc: Tomas Vondra <tomas(at)vondra(dot)me>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Jakub Wartak <jakub(dot)wartak(at)enterprisedb(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: scalability bottlenecks with (many) partitions (and more)
Date: 2025-03-04 22:01:18
Message-ID: 197167.1741125678@sss.pgh.pa.us
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Andres Freund <andres(at)anarazel(dot)de> writes:
> On 2025-03-04 16:30:34 -0500, Tom Lane wrote:
>> Yeah, I've been poking at that. It's not at all clear why the
>> animal is trying to run src/test/modules/ldap_password_func
>> now when it didn't before.

> It did do so before as well, afaict:
> https://buildfarm.postgresql.org/cgi-bin/show_stage_log.pl?nm=sifaka&dt=2025-03-04%2015%3A01%3A42&stg=module-ldap_password_func-check

> It seems to me that the difference is that now checkprep is run, whereas
> previously it wasn't.

Maybe, but still I don't see any changes in the BF client that'd
explain it. The animal's configuration hasn't changed either;
the only non-comment diff in its buildfarm.conf is

@@ -374,7 +376,7 @@

base_port => 5678,

- modules => [qw(TestUpgrade TestDecoding)],
+ modules => [qw(TestUpgrade)],

# settings used by run_branches.pl
global => {

which I changed to follow the lead of build-farm.conf.sample.
But surely that wouldn't affect this!?

regards, tom lane

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