adey <adey11(at)gmail(dot)com> writes:
> select datname, age(datfrozenxid), datfrozenxid, current_date, current_time
> FROM pg_database
> If template0 shouldn't be touched (and I don't know of deliberate access to
> it), why is this changing please?
Because current xid is changing and template0's datfrozenxid is not.
Nonetheless, if template0 is properly frozen then you don't need to
vacuum it, regardless of what age(datfrozenxid) says.
regards, tom lane