Re: Unexpected Standby Shutdown on sync_replication_slots change

On Fri, Jul 25, 2025 at 9:13 PM Hugo DUBOIS <hdubois@scaleway.com> wrote:
> I'm not sure if there's a particular use case for wal_level and sync_replication_slots not matching on a primary. So,
forme, Option 1 seems correct. 

I also prefer option #1.

However, on second thought, if some users are already running a server
(non-standby) with sync_replication_slots enabled and wal_level != logical
in v17, switching to option #1 could break their setup after a minor
version update. That would be surprising and confusing.

To avoid that, I think we should go with option #2—at least for v17.

Attached is an updated patch implementing option #2.

Regards,

--
Fujii Masao