"S. Bob" <sbob@xxxxxxxxxxxxxxxxxxxxx> writes: > 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); Why does your standby have rep slots? Is it also feeding lower subordinate standbys? > > > 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 > > > > > > > > > -- Jerry Sievers Postgres DBA/Development Consulting e: postgres.consulting@xxxxxxxxxxx
