Re: lost replication slots after pg_upgrade

On Tue, Oct 13, 2020 at 06:20:41PM +0200, Pavel Stehule wrote:
> Hi
> 
> One customer reports issue related to pg_upgrade.
> 
> I found a thread https://www.postgresql-archive.org/
> Upgrade-and-re-synchronization-with-logical-replication-pglogical-and-PG-10-td6001990.html
> 
> But I didn't find documentation of this limitation?

So, what is the question?  Peter Eisentraut is right that WAL is not
preserved, so replication slots are not preserved.  We do have
pg_upgrade instructions for upgrading binary replication, but I assume
people recreate the slots.

-- 
  Bruce Momjian  <bruce@momjian.us>        https://momjian.us
  EnterpriseDB                             https://enterprisedb.com

  The usefulness of a cup is in its emptiness, Bruce Lee