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Re: Possible Bug: high CPU usage for stats collector in 8.2

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Darcy Buskermolen <darcyb(at)commandprompt(dot)com>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: Possible Bug: high CPU usage for stats collector in 8.2
Date: 2007-03-01 19:57:13
Message-ID: 15236.1172779033@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers
Darcy Buskermolen <darcyb(at)commandprompt(dot)com> writes:
> I'm observing high CPU usage (95%) of a 2.6GHz opteron by the stats
> collector on an 8.2.3 box  investigation has lead me to belive that the
> stats file is written a lot more often that once every 500ms  the
> following shows this behavior.

Looks like someone broke the usage of PGSTAT_STAT_INTERVAL between 8.1
and 8.2 ... it's waiting 500 microseconds, not the intended 500
milliseconds.

			regards, tom lane

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