Using PostgreSQL logical replication with Multi-AZ DB clusters

What is Replication slots in PostgreSQL Streaming replication slot is active for pid Also, replication slots on a given standby persist the promotion of that standby to a primary This means that in the event of a primary DB instance failover or replication slot Replication slots are used to safeguard against the premature deletion of WAL segments before they have been applied by the standby server, thus

replication slot does not exist 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