Postgres WAL Overflow without Replication volumes -

Replication slots created by PGD v5 postgres delete replication slot The slot to be dropped must be inactive before it can be removed It is not possible to forcibly drop an active replication slot Change history PostgreSQL postgres delete replication slot The slot state state=present implies the slot must be present in the system state=absent implies the groups must be revoked from target_roles

postgresql drop replication slot  postgresql_slot module