Re: doc: add note that wal_level=logical doesn't set up logical replication in itself

On 2/6/26 4:36 PM, Florents Tselai wrote:
> Twice this week I've encountered users confusing wal_level=logical with
> the actual setup of Logical Replication.
> Since users often land directly on the config.html page via search engines,
> they see the setting and assume enabling it is all that is required for
> replication to work.
> I think adding a clarification note here will prevent this (not so
> uncommon) misunderstanding.

With the automatic change of effective WAL level which will be added in
PostgreSQL 19 I think that addition will just move the confusion to
another thing. If we want this note I think we need to clarify that
replica is enough since that can be automatically increased to logical
when necessary.

Andreas