| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Michail Nikolaev <michail(dot)nikolaev(at)gmail(dot)com> |
| Cc: | Simon Riggs <simon(dot)riggs(at)enterprisedb(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, Andrey Borodin <x4mmm(at)yandex-team(dot)ru>, Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>, Alexander Korotkov <aekorotkov(at)gmail(dot)com>, reshkekirill <reshkekirill(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Slow standby snapshot |
| Date: | 2022-11-29 20:46:07 |
| Message-ID: | 1218973.1669754767@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
I wrote:
> That seems like a fairly bad idea: it will add extra contention
> on ProcArrayLock, and I see no real strong argument that the path
> can't get traversed often enough for that to matter. It would
> likely be better for KnownAssignedXidsCompress to obtain the lock
> for itself, only after it knows there is something worth doing.
Since we're running out of time in the current commitfest,
I went ahead and changed that, and made the cosmetic fixes
I wanted, and pushed.
regards, tom lane
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