| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)commandprompt(dot)com> |
| Cc: | Chris Browne <cbbrowne(at)acm(dot)org>, pgsql-patches(at)postgresql(dot)org |
| Subject: | Re: [DOCS] Autovacuum and XID wraparound |
| Date: | 2007-05-16 05:20:56 |
| Message-ID: | 23362.1179292856@sss.pgh.pa.us |
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| Lists: | pgsql-docs pgsql-patches |
Alvaro Herrera <alvherre(at)commandprompt(dot)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
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