Logical Replication in PostgreSQL 10

A PostgreSQL replication slot is a vital feature ensuring the master server retains necessary Write-Ahead Log files, even when replicas

Normally, the remote replication slot is created automatically when the subscription is created during CREATE SUBSCRIPTION, and it is dropped

dropz slot The default is 10 This parameter can only be set at server start Setting it to a lower value than the number of currently existing replication slots will

drop em slot Failover of the logical replication slot​ · Configure replication slot in PostgreSQL · Wait for replication slot to be ready, then begin a transaction and export