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From: Tom Lane <tgl@sss.pgh.pa.us>
To: minshall@intellicon.biz
Cc: pgsql-performance@postgresql.org, Alvaro Herrera <alvherre@commandprompt.com>
Subject: Re: stats collector process high CPU utilization
Date: Thu, 08 Feb 2007 23:26:58 -0500
Message-ID: <14668.1170995218@sss.pgh.pa.us> (raw)
In-Reply-To: <62089.75.14.32.120.1170994418.squirrel@intellicon.biz>
References: <45CB5441.1040707@intellicon.biz>
	<21013.1170955076@sss.pgh.pa.us>
	<45CB5D06.7090004@intellicon.biz>
	<7994.1170960391@sss.pgh.pa.us>
	<45CB9330.3000603@intellicon.biz>
	<19935.1170969862@sss.pgh.pa.us>
	<45CB9C4D.30902@intellicon.biz>
	<20601.1170972476@sss.pgh.pa.us>
	<45CBA443.9090101@intellicon.biz>
	<7959.1170986672@sss.pgh.pa.us>
	<62089.75.14.32.120.1170994418.squirrel@intellicon.biz>

minshall@intellicon.biz writes:
> While exploring this problem, I've noticed that one of the frequent insert
> processes creates a few temporary tables to do post-processing.  Is it
> possible that the stats collector is getting bloated with stats from these
> short-lived temporary tables?  During periods of high activity it could be
> creating temporary tables as often as two per second.

Hmmm ... that's an interesting point, but offhand I don't see why it'd
cause more of a problem in 8.2 than 8.1.  Alvaro, any thoughts?

			regards, tom lane



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