Re: Usage up to 50% CPU - Mailing list pgsql-performance

From Andres Retzlaff
Subject Re: Usage up to 50% CPU
Date
Msg-id BAY141-F16157D6D49CE3E6DC40F1A8B4E0@phx.gbl
Whole thread Raw
In response to Re: Usage up to 50% CPU  (Michael Stone <mstone+postgres@mathom.us>)
List pgsql-performance
>On Fri, Apr 27, 2007 at 07:23:41PM +0930, Shane Ambler wrote:
>>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?

>If so, you probably wouldn't be seeing that much cpu usage... (if the cpu
>is waiting for disk it's >idling)

>Mike Stone

Yes, I notice 3 steeps:
1) the CPU is at 100% (of 1 cpu)
2) the HDD is 100% but no much of the cpu
3) I get the query display

I will see what can I do to improved the speed. At this moment is taking 10
sec to get the responce.

Regards,
Andrew Retzlaff

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