Re: [DOCS] Autovacuum and XID wraparound - Mailing list pgsql-patches

From Heikki Linnakangas
Subject Re: [DOCS] Autovacuum and XID wraparound
Date
Msg-id 464ABF2A.3000005@enterprisedb.com
Whole thread Raw
In response to Re: [DOCS] Autovacuum and XID wraparound  (Alvaro Herrera <alvherre@commandprompt.com>)
List pgsql-patches
Alvaro Herrera wrote:
> In any case the change is a very small patch, which I attach but I
> haven't tested.  This only works if the new rewriteheap stuff actually
> changes Xids to follow OldestXmin, i.e. all tuples that have older
> Xmin/Xmax are frozen (or marked with the current Xid).  Heikki, can you
> confirm that this is the case?

No, CLUSTER doesn't freeze tuples. It could do that easily, it didn't
occur to me when I wrote it. It would make it harder to debug, though,
should we have any problems with it in the future.

--
   Heikki Linnakangas
   EnterpriseDB   http://www.enterprisedb.com

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