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From: Heikki Linnakangas <[email protected]>
To: Alvaro Herrera <[email protected]>
Cc: Jim C. Nasby <[email protected]>
Cc: Tom Lane <[email protected]>
Cc: Chris Browne <[email protected]>
Cc: [email protected]
Cc: Heikki Linnakangas <[email protected]>
Subject: Re: [DOCS] Autovacuum and XID wraparound
Date: Wed, 16 May 2007 09:22:02 +0100
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
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	<[email protected]>
	<[email protected]>
	<[email protected]>
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	<[email protected]>

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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