Horton

Re: Reducing power consumption on idle servers

Magnus Hagander <magnus@hagander.net>

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From: Magnus Hagander <magnus@hagander.net>
To: Simon Riggs <simon.riggs@enterprisedb.com>
Cc: Andres Freund <andres@anarazel.de>, Thomas Munro <thomas.munro@gmail.com>, PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Date: 2022-02-26T17:14:56Z
Lists: pgsql-hackers 
On Mon, Feb 21, 2022 at 5:11 PM Simon Riggs
<simon.riggs@enterprisedb.com> wrote:
>
> On Sat, 19 Feb 2022 at 17:03, Andres Freund <andres@anarazel.de> wrote:
> >
> > Hi,
> >
> > On 2022-02-19 14:10:39 +0000, Simon Riggs wrote:
> > IMO we should instead consider either deprecating file based promotion, or
> > adding an optional dependency on filesystem monitoring APIs (i.e. inotify etc)
> > that avoid the need to poll for file creation.

Came here to suggest exactly that :)


> Deprecating explicit file-based promotion is possible and simple, so
> that is the approach in the latest version of the patch.

Is there any actual use-case for this other than backwards
compatibility? The alternative has certainly been around for some time
now, so if we don't know a specific use-case for the file-based one
it's definitely time to deprecate it properly.


-- 
 Magnus Hagander
 Me: https://www.hagander.net/
 Work: https://www.redpill-linpro.com/

Commits

  1. Remove promote_trigger_file.

  2. Add pg_promote function

  3. pg_ctl promote