wal_level change in PostgreSQL 14 creates standby compatibility uncertainty after pg_upgrade
Goal Determine whether a standby server that was initially set up with wal_level=replica must be restarted, reinitialized, or simply have its wal_level parameter changed and reloaded after the primary’s wal_level is switched to logical during a pg_upgrade to PostgreSQL 14, in order to maintain logical replication compatibility. Constraints and Uncertainty Po