| From: | Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com> |
|---|---|
| To: | x4mmm(at)yandex-team(dot)ru |
| Cc: | alvherre(at)alvh(dot)no-ip(dot)org, vignesh21(at)gmail(dot)com, amborodin86(at)gmail(dot)com, i(dot)lazarev(at)postgrespro(dot)ru, y(dot)sokolov(at)postgrespro(dot)ru, andres(at)anarazel(dot)de, thomas(dot)munro(at)gmail(dot)com, gilles(at)darold(dot)net, tomas(dot)vondra(at)enterprisedb(dot)com, tomas(dot)vondra(at)2ndquadrant(dot)com, aekorotkov(at)gmail(dot)com, a(dot)lubennikova(at)postgrespro(dot)ru, daniel(at)yesql(dot)se, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: MultiXact\SLRU buffers configuration |
| Date: | 2024-02-29 01:59:44 |
| Message-ID: | 20240229.105944.773077833314087742.horikyota.ntt@gmail.com |
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| Lists: | pgsql-hackers |
At Sat, 3 Feb 2024 22:32:45 +0500, "Andrey M. Borodin" <x4mmm(at)yandex-team(dot)ru> wrote in
> Here's the test draft. This test reliably reproduces sleep on CV when waiting next multixact to be filled into "members" SLRU.
By the way, I raised a question about using multiple CVs
simultaneously [1]. That is, I suspect that the current CV
implementation doesn't allow us to use multiple condition variables at
the same time, because all CVs use the same PCPROC member cvWaitLink
to accommodate different waiter sets. If this assumption is correct,
we should resolve the issue before spreading more uses of CVs.
[1] https://www.postgresql.org/message-id/20240227.150709.1766217736683815840.horikyota.ntt%40gmail.com
regards.
--
Kyotaro Horiguchi
NTT Open Source Software Center
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