public inbox for [email protected]
help / color / mirror / Atom feedFrom: Fujii Masao <[email protected]>
To: Heikki Linnakangas <[email protected]>
Cc: Thom Brown <[email protected]>
Cc: [email protected]
Subject: Re: pgsql: Refactor how some aux processes advertise their ProcNumber
Date: Thu, 9 Jul 2026 21:34:50 +0900
Message-ID: <CAHGQGwEwLCGpRnKOnxBz-a5zPUdEdBPhGrq7GPgxc3KtDpyHoQ@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
<CAA-aLv6UHXubNxmAjNH8PnyKKkaXePO1ggB15=iidNW08T4hSg@mail.gmail.com>
<CAHGQGwH8n4BMjBJcL1ob6YTJYn1kTmVwO6mEYoEGyrGyNXaaXw@mail.gmail.com>
<[email protected]>
On Thu, Jul 9, 2026 at 9:17 PM Heikki Linnakangas <[email protected]> wrote:
> Why is the autovacuum launcher not an aux process? I guess it's because
> it needs to acquire a heavy-weight lock in order to read the list of
> databases.
That seems to be one of the reasons, based on the comment about auxiliary
processes in miscadmin.h:
-------------------------
* Auxiliary processes. These have PGPROC entries, but they are not
* attached to any particular database, and cannot run transactions or
* even take heavyweight locks. There can be only one of each of these
* running at a time, except for IO workers.
-------------------------
Regards,
--
Fujii Masao
view thread (8+ messages) latest in thread
reply
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: [email protected]
Cc: [email protected], [email protected], [email protected], [email protected]
Subject: Re: pgsql: Refactor how some aux processes advertise their ProcNumber
In-Reply-To: <CAHGQGwEwLCGpRnKOnxBz-a5zPUdEdBPhGrq7GPgxc3KtDpyHoQ@mail.gmail.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox