| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Alexander Kukushkin <cyberdemn(at)gmail(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Jeff Davis <pgsql(at)j-davis(dot)com>, pgsql-bugs(at)postgresql(dot)org |
| Subject: | Re: [15] Custom WAL resource managers, single user mode, and recovery |
| Date: | 2022-07-15 07:26:51 |
| Message-ID: | 20220715072651.w2os7stv4pbuw4ml@awork3.anarazel.de |
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| Lists: | pgsql-bugs |
Hi,
On 2022-07-15 09:00:40 +0200, Alexander Kukushkin wrote:
> On Fri, 15 Jul 2022 at 05:58, Andres Freund <andres(at)anarazel(dot)de> wrote:
>
> Well, right now the main reason people need single user is anti-wraparound
> > stuff. And there it's actively harmful (requiring a shutdown checkpoint,
> > emptying shared buffers, foreground checkpoints, foreground writing of all
> > WAL, etc).
> >
>
> No, the single-user mode is also required to ensure a clean shutdown before
> pg_rewind.
I don't see why that requires single user mode? It's used, sure, but that
looks almost trival to change.
Greetings,
Andres Freund
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