After upgrading RDS to Postgres 13.1 our logical replication failed with the connections exceeds max_wal_senders (currently 0) error. When I checked the parameter group I could not find the option to set the wal_level anymore (should be logical). Does anyone know how to set it?
Logical replication can be enabled by setting rds.logical_replication = 1 and shared_preload_libraries = pglogical in the parameter group.
The wal_level does not need to be set explicitly.