Re: What's the XID?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Jeff Frost <jeff(at)frostconsultingllc(dot)com>
Cc: Andrew Sullivan <ajs(at)crankycanuck(dot)ca>, pgsql-admin(at)postgresql(dot)org
Subject: Re: What's the XID?
Date: 2007-12-28 02:46:10
Message-ID: 24298.1198809970@sss.pgh.pa.us
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Jeff Frost <jeff(at)frostconsultingllc(dot)com> writes:
> On Thu, 27 Dec 2007, Tom Lane wrote:
>> There's no global counter. There's a backend-local "virtual transaction
>> id" counter.

> That's a drag as I have quite a few clients who graph the xacts/sec with MRTG.
> Most of these clients have read heavy workloads and it would be great to be
> able to graph read vs write xacts, but a drag if you have no visibility into
> the read xacts.

Why aren't you using the pgstats xact counters for that?

regards, tom lane

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