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From: Alvaro Herrera <alvherre@commandprompt.com>
To: Mikko Partio <mpartio@gmail.com>
Cc: Pallav Kalva <pkalva@livedatagroup.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-performance@postgresql.org
Subject: Re: 8.2 Autovacuum BUG ?
Date: Fri, 31 Aug 2007 14:47:44 -0400
Message-ID: <20070831184744.GK8046@alvh.no-ip.org> (raw)
In-Reply-To: <2ca799770708311131r5ae5e3eera66a7cea1fc5917d@mail.gmail.com>
References: <46D83427.60001@livedatagroup.com>
	<25038.1188574775@sss.pgh.pa.us>
	<46D83C50.3040409@livedatagroup.com>
	<20070831161158.GD8046@alvh.no-ip.org>
	<2ca799770708311131r5ae5e3eera66a7cea1fc5917d@mail.gmail.com>

Mikko Partio escribió:

> Off-topic question: the documentation says that XID numbers are 32 bit.
> Could the XID be 64 bit when running on a 64 bit platform? That would
> effectively prevent wrap-around issues.

No, because they would take too much space in tuple headers.

-- 
Alvaro Herrera                  http://www.amazon.com/gp/registry/5ZYLFMCVHXC
Al principio era UNIX, y UNIX habló y dijo: "Hello world\n".
No dijo "Hello New Jersey\n", ni "Hello USA\n".



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