Re: max_slot_wal_keep_size and wal_keep_segments

Masahiko Sawada <masahiko.sawada@2ndquadrant.com>

From: Masahiko Sawada <masahiko.sawada@2ndquadrant.com>
To: David Steele <david@pgmasters.net>
Cc: Alvaro Herrera <alvherre@2ndquadrant.com>, Fujii Masao <masao.fujii@oss.nttdata.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2020-07-03T07:54:40Z
Lists: pgsql-hackers
On Thu, 2 Jul 2020 at 02:18, David Steele <david@pgmasters.net> wrote:
>
> On 7/1/20 10:54 AM, Alvaro Herrera wrote:
> > On 2020-Jul-01, Fujii Masao wrote:
> >
> >> On 2020/07/01 12:26, Alvaro Herrera wrote:
> >>> On 2020-Jun-30, Fujii Masao wrote:
> >>>
> >>>> When I talked about max_slot_wal_keep_size as new feature in v13
> >>>> at the conference, I received the question like "Why are the units of
> >>>> setting values in max_slot_wal_keep_size and wal_keep_segments different?"
> >>>> from audience. That difference looks confusing for users and
> >>>> IMO it's better to use the same unit for them. Thought?
> >>>
> >>> Do we still need wal_keep_segments for anything?
> >>
> >> Yeah, personally I like wal_keep_segments because its setting is very
> >> simple and no extra operations on replication slots are necessary.
> >
> > Okay.  In that case I +1 the idea of renaming to wal_keep_size.
>
> +1 for renaming to wal_keep_size.
>

+1 from me, too.

Regards,


--
Masahiko Sawada            http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services



Commits

  1. doc: Mention the rename of wal_keep_segments GUC in release note.

  2. Rename wal_keep_segments to wal_keep_size.