Re: stats collector process high CPU utilization

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
Cc: minshall(at)intellicon(dot)biz, pgsql-performance(at)postgresql(dot)org
Subject: Re: stats collector process high CPU utilization
Date: 2007-02-09 15:55:57
Message-ID: 29832.1171036557@sss.pgh.pa.us
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I wrote:
> Alvaro Herrera <alvherre(at)commandprompt(dot)com> writes:
>> Regarding temp tables, I'd think that the pgstat entries should be
>> getting dropped at some point in both releases. Maybe there's a bug
>> preventing that in 8.2?

> Hmmm ... I did rewrite the backend-side code for that just recently for
> performance reasons ... could I have broken it?

I did some testing with HEAD and verified that pgstat_vacuum_tabstat()
still seems to do what it's supposed to, so that theory falls down.

Alvaro, could you send Benjamin your stat-file-dumper tool so we can
get some more info? Alternatively, if Benjamin wants to send me a copy
of his stats file (off-list), I'd be happy to take a look.

regards, tom lane

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