From: | Alexander Lakhin <exclusion(at)gmail(dot)com> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Andrew Dunstan <andrew(at)dunslane(dot)net> |
Cc: | PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Masahiko Sawada <msawada(at)postgresql(dot)org> |
Subject: | Re: xid_wraparound tests intermittent failure. |
Date: | 2024-07-21 20:08:08 |
Message-ID: | 02373ec3-50c6-df5a-0d65-5b9b1c0c86d6@gmail.com |
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Lists: | pgsql-hackers |
Hello,
21.07.2024 20:34, Tom Lane wrote:
> Andrew Dunstan <andrew(at)dunslane(dot)net> writes:
>> I noticed this when working on the PostgreSQL::Test::Session project I
>> have in hand. All the tests pass except occasionally the xid_wraparound
>> tests fail. It's not always the same test script that fails either. I
>> tried everything but couldn't make the failure stop. So then I switched
>> out my patch so it's running on plain master and set things running in a
>> loop. Lo and behold it can be relied on to fail after only a few
>> iterations.
> I have been noticing xid_wraparound failures in the buildfarm too.
> They seemed quite infrequent, but it wasn't till just now that
> I realized that xid_wraparound is not run by default. (You have to
> put "xid_wraparound" in PG_TEST_EXTRA to enable it.) AFAICS the
> only buildfarm animals that have enabled it are dodo and perentie.
> dodo is failing this test fairly often:
>
> https://buildfarm.postgresql.org/cgi-bin/show_history.pl?nm=dodo&br=HEAD
I think this failure is counted at [1]. Please look at the linked message
[2], where I described what makes the test fail.
[1]
https://wiki.postgresql.org/wiki/Known_Buildfarm_Test_Failures#001_emergency_vacuum.pl_fails_to_wait_for_datfrozenxid_advancing
[2] https://www.postgresql.org/message-id/5811175c-1a31-4869-032f-7af5e3e4506a@gmail.com
Best regards,
Alexander
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