All;
We have a master and a standby (Streaming replication).
This query produces a value of approx 1.5million on the master and
approx 80million on the standby:
select slot_name, slot_type, database, xmin from pg_replication_slots
order by age(xmin);
We are running replication in async mode.
A couple of questions:
- Is it unusual for the master & standby to differ dramatically like this?
- could the replication slot (i.e. the xmin on the standby) be
preventing vacuum from cleaning up row versions on the master?
Thanks in advance