Re: Questions on Upgrading PostgreSQL from 15.0 to 15.9 and Setting Up Streaming Replication

[Christophe Pettus]

> On Nov 24, 2024, at 09:03, Subhash Udata <subhashud...@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.