Re: max_slot_wal_keep_size and wal_keep_segments

From: Masahiko Sawada <masahiko(dot)sawada(at)2ndquadrant(dot)com>
To: David Steele <david(at)pgmasters(dot)net>
Cc: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Fujii Masao <masao(dot)fujii(at)oss(dot)nttdata(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: max_slot_wal_keep_size and wal_keep_segments
Date: 2020-07-03 07:54:40
Message-ID: CA+fd4k7SHWxJ+z7=vE9ZYGstNCBxTQ_2jWZcJH2USYspH6dCZg@mail.gmail.com
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On Thu, 2 Jul 2020 at 02:18, David Steele <david(at)pgmasters(dot)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

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