| From: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> |
|---|---|
| To: | "Hayato Kuroda (Fujitsu)" <kuroda(dot)hayato(at)fujitsu(dot)com> |
| Cc: | "'pgsql-hackers(at)lists(dot)postgresql(dot)org'" <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Some shared memory chunks are allocated even if related processes won't start |
| Date: | 2024-03-04 08:09:15 |
| Message-ID: | 202403040809.ovvbwsmerzer@alvherre.pgsql |
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| Thread: | |
| Lists: | pgsql-hackers |
On 2024-Mar-04, Hayato Kuroda (Fujitsu) wrote:
> Dear hackers,
>
> While reading codes, I found that ApplyLauncherShmemInit() and
> AutoVacuumShmemInit() are always called even if they would not be
> launched.
Note that there are situations where the autovacuum launcher is started
even though autovacuum is nominally turned off, and I suspect your
proposal would break that. IIRC this occurs when the Xid or multixact
counters cross the max_freeze_age threshold.
--
Álvaro Herrera PostgreSQL Developer — https://www.EnterpriseDB.com/
"Porque Kim no hacía nada, pero, eso sí,
con extraordinario éxito" ("Kim", Kipling)
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