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 <[email protected]> https://momjian.us
EDB https://enterprisedb.com
Do not let urgent matters crowd out time for investment in the future.
diff --git a/doc/src/sgml/logical-replication.sgml b/doc/src/sgml/logical-replication.sgml
index 8a9674bd6d1..aa013f348d4 100644
--- a/doc/src/sgml/logical-replication.sgml
+++ b/doc/src/sgml/logical-replication.sgml
@@ -225,8 +225,9 @@
</para>
<para>
- By default a new subscription creates a logical replication slot on the
- publisher and then uses this slot to preserve necessary WAL (see <xref
+ By default a new subscription creates a logical replication slot on
+ the publisher and then uses this slot to track relevant transaction
+ activity and preserve necessary WAL (see <xref
linkend="streaming-replication-slots"/>). Additional replication
slots may be required for the initial data synchronization of
pre-existing table data and those will be dropped at the end of data
