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help / color / mirror / Atom feedFrom: Robert Haas <[email protected]>
To: Melanie Plageman <[email protected]>
Cc: Daniel Gustafsson <[email protected]>
Cc: Andres Freund <[email protected]>
Cc: Tom Lane <[email protected]>
Cc: Masahiko Sawada <[email protected]>
Cc: Kyotaro Horiguchi <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Cc: Amit Kapila <[email protected]>
Subject: Re: Should vacuum process config file reload more often
Date: Wed, 5 Apr 2023 15:58:28 -0400
Message-ID: <CA+TgmoYshCZF4a0k4R3eOwn08xXqSdfmPxzGxS0RKBVmKAByGg@mail.gmail.com> (raw)
In-Reply-To: <CAAKRu_auVL_uE794zwiX6t18LJvKtJ5mrmV9tkbpWzS8AYeChQ@mail.gmail.com>
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On Wed, Apr 5, 2023 at 3:44 PM Melanie Plageman
<[email protected]> wrote:
> VacuumUpdateCosts() also calls AutoVacuumUpdateCostLimit(), so this will
> happen if a config reload is pending the next time vacuum_delay_point()
> is called (which is pretty often -- roughly once per block vacuumed but
> definitely more than once per table).
>
> Relevant code is at the top of vacuum_delay_point():
>
> if (ConfigReloadPending && IsAutoVacuumWorkerProcess())
> {
> ConfigReloadPending = false;
> ProcessConfigFile(PGC_SIGHUP);
> VacuumUpdateCosts();
> }
Yeah, that all makes sense, and I did see that logic, but I'm
struggling to reconcile it with what that comment says.
Maybe I'm just confused about what that comment is trying to explain.
--
Robert Haas
EDB: http://www.enterprisedb.com
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Subject: Re: Should vacuum process config file reload more often
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