Re: pgsql: doc: remove verbiage about "receiving" data from rep. slots

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Andres Freund <andres(at)anarazel(dot)de>
Cc: pgsql-committers(at)lists(dot)postgresql(dot)org
Subject: Re: pgsql: doc: remove verbiage about "receiving" data from rep. slots
Date: 2025-11-14 14:49:02
Message-ID: aRdBXmI7lmLkEaDf@momjian.us
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On Fri, Nov 14, 2025 at 09:25:20AM -0500, Andres Freund wrote:
> Hi,
>
> On 2025-11-14 09:12:33 -0500, Bruce Momjian wrote:
> > On Fri, Nov 14, 2025 at 09:05:07AM -0500, Andres Freund wrote:
> > > Hi,
> > >
> > > On 2025-11-14 09:02:12 -0500, Andres Freund wrote:
> > > > On 2025-11-14 13:56:06 +0000, Bruce Momjian wrote:
> > > > > doc: remove verbiage about "receiving" data from rep. slots
> > > > >
> > > > > The slots are just LSN markers, not something to receive from.
> > > >
> > > > I think this is wrong. Logical slots also preserve resources other than WAL.
> > >
> > > I also think that the complaint about slots not being something to receive
> > > from is simply wrong for logical slots.
> >
> > Uh, can you clarify since I can't find details on what they preserve.
>
> Slots (physical ones can, logical ones always do), prevent row cleanup on the
> primary.

I see your point. How is the attached patch? The link right after the
modified text talks only about WAL retention, so I think we need
something in this sentence to say we do more than WAL retention for
logical replication slots.

--
Bruce Momjian <bruce(at)momjian(dot)us> https://momjian.us
EDB https://enterprisedb.com

Do not let urgent matters crowd out time for investment in the future.

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