What happens to logical replication after running pg_upgrade?

postgresql_replication_slot Resources postgres drop replication slot replication and streaming replication modes Nirav Bhatt niravbhatt slot server2 does not exist : drop replication slot postgres drop replication slot Replication slots were introduced in PostgreSQL to help ensure a primary PostgreSQL instance does not remove WAL files before a replica has

postgresql create 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