On Sun, Nov 24, 2024 at 12:06 PM Christophe Pettus <xof@thebuild.com> wrote:
> On Nov 24, 2024, at 09:03, Subhash Udata <subhashudata@gmail.com> wrote: > When we shut down the standby, upgrade it, and then start it back up, will the replication automatically resume from the primary to the standby?
Assuming that the standby has access to any WAL generated during the shutdown (either still in the primary's WAL directory, or via an archive using archive_command), yes. If you are not using a WAL archive using archive_command, you will want to make sure your wal_keep_size parameter is set high enough that required WAL segments aren't recycled during the standby's downtime.
Doesn't the existence of a replication slot force PG to retain WAL files when replication is broken?
