Documentation: 16: Streaming Replication Protocol

Physical Replication Mechanisms in PostgreSQL postgres create replication slot A replication slot has an identifier that is unique across all databases in a PostgreSQL cluster Slots persist independently of the connection using them and postgres drop replication slot To enable this feature, you need to call the pg_create_logical_replication_slot() function or use the CREATE REPLICATION SLOTLOGICAL command

postgres delete replication slot By themselves, replication slots occupy very little disk space They just store tiny bit of metadata, including a pointer to a position in WAL