Hi, I suggest outlining what you are trying to achieve here. Starting a new thread and expecting people to dig through another thread to infer what you are actually trying to achive isn't great.
FWIW, I'm *extremely* doubtful it's worth adding features that depend on a PGC_POSTMASTER wal_level=minimal being used. Which this does, a far as I understand. If somebody added support for dynamically adapting wal_level (e.g. wal_level=auto, that increases wal_level to replica/logical depending on the presence of replication slots), it'd perhaps be different. On 2020-11-11 17:33:17 +0900, Kyotaro Horiguchi wrote: > FWIW this is a revised version of the PoC, which has some known > problems. > > - Flipping of Buffer persistence is not WAL-logged nor even be able to > be safely roll-backed. (It might be better to drop buffers). That's obviously a no-go. I think you might be able to address this if you accept that the command cannot be run in a transaction (like CONCURRENTLY). Then you can first do the catalog changes, change the persistence level, and commit. Greetings, Andres Freund
