Documentation: 16: Streaming Replication Protocol

Answer If you do not see the replication slot under the slot_name column then the slot does not exist There are two potential reasons for this: If you do

Replication slots are a persistent data structure used to track the progress of replication across subscribers, and to ensure that WAL data

replication slot already exists Allow you to replicate data out of Postgres · Use the write-ahead log as the source of changes · Use logical replication slots to send out

replication slot Checking for replication slots Starting from PostgreSQL , it is also necessary and useful to check for leftover replication slots