How To Set Up Logical Replication with PostgreSQL 10 on Ubuntu

Replication slots were introduced in PostgreSQL to help ensure a primary PostgreSQL instance does not remove WAL files before a replica has

Replication slots provide an automated way to ensure that the primary does not remove WAL segments until they have been received by all standbys

replication slot is active for pid binlog_row_image system variable does not exist MySQL version must be at Verify that a replication slot exists for the database you're trying to

replication slot already exists does not exist If it already exists, it must be empty -S slotname --slot=slotname This option can only be used together with -X stream