Re: [DOCS] Autovacuum and XID wraparound

Alvaro Herrera <alvherre@commandprompt.com> writes:
> Tom Lane wrote:
>> I had the idea we were doing that already --- at least I'm pretty sure I
>> remember it being discussed.  But I see it's not being done in HEAD.

> Patch to do it attached.  I am thinking we can do something similar in
> CLUSTER as well.

Umm ... you'd have to be a lot more conservative in CLUSTER now that
it's MVCC-safe.  I don't say that CLUSTER can't push up relfrozenxid,
but there's something wrong if CLUSTER and TRUNCATE are trying to
push it up the same amount.

            regards, tom lane