On Sat, Jun 4, 2022 at 03:08:58PM +0530, Nikhil Shetty wrote:
> Hi Jack,
>
> I followed the same steps multiple times but each time, slot had to be
> recreated.
>
> The slots under directory pg_replslot are not created in the new cluster
> during
> pg_upgrade.
>
> Thanks and Regards,
> Nikhil
>
> On Sat, 4 Jun 2022 at 1:48 AM, Jack DeVries <[email protected]> wrote:
>
> Hi Nikhil,
>
> >From the pgupgrade docs:
>
> > 9. Prepare for standby server upgrades
> >
> > If you are upgrading standby servers using methods outlined in section
> > Step 11, verify that the old standby servers are caught up by running
> > pg_controldata against the old primary and standby clusters. Verify
> > that the “Latest checkpoint location” values match in all clusters.
> > (There will be a mismatch if old standby servers were shut down before
> > the old primary or if the old standby servers are still running.)
> > Also, make sure wal_level is not set to minimal in the postgresql.conf
> > file on the new primary cluster.
>
> (source: https://www.postgresql.org/docs/devel/pgupgrade.html)
>
> I'm a new contributor so please forgive me if I'm on the wrong track,
> but if you follow this step, won't you also be ensuring that replication
> slots do not need to be migrated, since you've just ensured that standby
> clusters are in sync with the primary cluster? Please let me know if I'm
> missing anything!
I have written the attached patch to document this.
--
Bruce Momjian <[email protected]> https://momjian.us
EDB https://enterprisedb.com
Indecision is a decision. Inaction is an action. Mark Batterson
diff --git a/doc/src/sgml/ref/pgupgrade.sgml b/doc/src/sgml/ref/pgupgrade.sgml
index f3eb7fbd33..d065227656 100644
--- a/doc/src/sgml/ref/pgupgrade.sgml
+++ b/doc/src/sgml/ref/pgupgrade.sgml
@@ -619,7 +619,8 @@ rsync --archive --delete --hard-links --size-only --no-inc-recursive /vol1/pg_tb
Configure the servers for log shipping. (You do not need to run
<function>pg_backup_start()</function> and <function>pg_backup_stop()</function>
or take a file system backup as the standbys are still synchronized
- with the primary.)
+ with the primary.) Replication slots are not copied and must
+ be recreated.
</para>
</step>
