From: Amit Kapila <amit.kapil...@gmail.com> > So you want your users to shutdown and restart the server before Copy > because that would be required if you want to change the wal_level.
Yes. They seem to be fine with it, as far as I heard from a person who is involved in the system design. > However, even if we do that, users who are running the server > previously with wal_level as 'replica' won't be happy after doing this > change. Because if they change the wal_level to 'none' for certain > operations like bulk load and then again change back the mode to > 'replica' they need to back up the database again to setup 'replica' > as they can't continue replication from the previous point (consider > update on a page for which previously WAL was not written). Yes, it requires the database backup. The database backup should be a daily task anyway, so I expect it wouldn't impose extra maintenance burdon on the user. Plus, not all users use the streaming replication for HA. I think it's helpful for the maturing Postgres to provide some kind of solution for some context so that user can scratch their itches. Regards Takayuki Tsunakawa
