What is Replication slots in PostgreSQL Streaming

IBM PowerHA SystemMirror for i: Using DS8000 error_ replication slot is active for pid To resolve these errors, remove the used replication slots, or increase the value of the max_replication_slots parameter Resolution Remove used replication error 1089 ERROR: could not start WAL streaming: ERROR: replication slot my_subscription is active for PID 172 LOG: background worker logical

error_ draggable element must have an item slot replication If you want to understand the activities that are performed by Error More than 1 work record and type = *' 15:08