Magnus Hagander wrote:
On Fri, Apr 27, 2007 at 08:10:48AM +0000, Andres Retzlaff wrote:
Hi Magnus,
in this case each CPU goes up to 50%, giveing me 50% total usage. I was
specting as you say 1 query 100% cpu.
Any ideas?
No. 1 query will only use 100% of *one* CPU, which means 50% total usage.
You need at least one query per CPU to reach full 100% of the whole system.
(Actually, you can get slightly above 50% since the query will run on one
CPU and the OS and autovacuum and bgwriter can run on the other. But it's
marginally)
//Magnus
I would think that as you are sitting and watching the cpu usage, your
query would seem to taking a while to run, leading me to wonder if you
are getting a full table scan that is causing pg to wait for disk response?
Or are you running a long list of steps that take a while?
--
Shane Ambler
pgSQL@xxxxxxxxxx
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