PostgreSQL Streaming Physical Replication With Slots

Logical replication slots are used to track the WAL positions on the primary server so that the standby server can request

We need to sync the postgresdata directory The PostgreSQL way is to run pg_basebackup which syncs it over the replication slot Here is a

postgres replication slot Replication slots for High Availability A replication slot exists solely on the instance that created it, and PostgreSQL does not replicate it on the standby

postgresql replication slot Now a common cause for this kind of issue are replication slots which are not advanced: in that case, Postgres will hold on to all WAL segments