| From: | Michael Paquier <michael(at)paquier(dot)xyz> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Melanie Plageman <melanieplageman(at)gmail(dot)com>, Peter Geoghegan <pg(at)bowt(dot)ie>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>, Noah Misch <noah(at)leadboat(dot)com> |
| Subject: | Re: Vacuum ERRORs out considering freezing dead tuples from before OldestXmin |
| Date: | 2024-07-23 00:25:04 |
| Message-ID: | Zp74YAbnyi_yARGT@paquier.xyz |
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| Lists: | pgsql-hackers |
On Mon, Jul 22, 2024 at 10:37:17AM -0700, Andres Freund wrote:
> On 2024-07-22 13:16:49 -0400, Robert Haas wrote:
>> Laziness would have been not bothering to develop a TAP test for this
>> at all. Going to the trouble of creating one and not being able to
>> make it as fast or as stable as everybody would like is just being
>> human.
>
> Yea, I think calling weeks of effort by Melanie lazy is, uhm, not kind.
FWIW, I'm really impressed by what she has achieved here by Melanie,
fixing a hard bug while hacking a crazily-complicated test to make it
reproducible. This has an incredible amount of value in the long-run.
> It's not like somebody else had a great suggestion for how to do this in a
> better way either.
Sawada-san and John are the two ones in the best position to answer
that. I'm not sure either how to force a second index pass, either.
Hmm. An idea would be to manipulate the TIDStore stack under the
injection points switch? This is run by the CI and some buildfarm
members already.
--
Michael
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