| From: | Tomas Vondra <tomas(at)vondra(dot)me> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de>, pgsql-hackers(at)postgresql(dot)org, Heikki Linnakangas <hlinnaka(at)iki(dot)fi> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Subject: | Re: Snapshot related assert failure on skink |
| Date: | 2025-03-17 11:59:12 |
| Message-ID: | d9a29ded-8a95-47f2-a2d6-038fecf175e0@vondra.me |
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| Lists: | pgsql-hackers |
On 3/17/25 12:36, Tomas Vondra wrote:
> ...
>
> I'm still fiddling with the script, trying to increase the probability
> of the (apparent) race condition. On one machine (old Xeon) I can hit it
> very easily/reliably, while on a different machine (new Ryzen) it's very
> rare. I don't know if that's due to difference in speed of the CPU, or
> fewer cores, ... I guess it changes the timing just enough.
>
> I've also tried running the stress test on PG17, and I'm yet to see a
> single failure there. Not even on the xeon machine, that hits it
> reliably on 18. So this seems to be a PG18-only issue.
>
And of course, the moment I sent this, I got a failure on 17 too. But
it's seems much harder to hit (compared to 18).
regards
--
Tomas Vondra
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