What is Replication slots in PostgreSQL Streaming

Replication slot is not active for a standby or replication data lagging values are null Meaning: The standby replication slot active flag value is false or

Make logical replication slots survive failoverswitchover on PostgreSQL v11+ The replication slot if copied from the primary to the replica with restart and

replication slot does not exist active Call in the pg_auto_failover Node Active conf identify Run the IDENTIFY_SYSTEM replication command on given host pg_autoctl do primary slot

replication slot active_pid : The PID of the WAL sender process that is using this slot, if active xmin : The oldest transaction ID that this slot needs to retain