Tom Lane wrote:
> "Olleg Samoylov" <olleg_s@mail.ru> writes:
>
>> Opps, template1 must not be vacuumed.
>
>
> Says who?
>
> If we didn't vacuum template1 then it would be subject to XID
> wraparound problems, unless it had never been modified, which is
> something vacuumdb can't count on.
template1 frozen by "vacuum freeze", thus can't be subject of XID
wraparound problems, isn't it?
man vacuum:
> If this is done when there are no other open transactions in the same
> database, then it is guaranteed that all tuples in the
> database are ââfrozenââ and will not be subject to transaction
> ID wraparound problems, no matter how long the database is left
> unvacuumed.
IMHO "vacuumdb -a" must don't vacuum database with
datvacuumxid=datfrozenxid.
--
Olleg Samoylov