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Re: Usage up to 50% CPU

From: Andres Retzlaff
Subject: Re: Usage up to 50% CPU
Date: ,
Msg-id: BAY141-F16157D6D49CE3E6DC40F1A8B4E0@phx.gbl
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In response to: Re: Usage up to 50% CPU  (Michael Stone)
List: pgsql-performance

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Usage up to 50% CPU  ("Andres Retzlaff", )
 Re: Usage up to 50% CPU  (Magnus Hagander, )
  Re: Usage up to 50% CPU  ("Andres Retzlaff", )
   Re: Usage up to 50% CPU  (Magnus Hagander, )
    Re: Usage up to 50% CPU  (Shane Ambler, )
     Re: Usage up to 50% CPU  (Michael Stone, )
      Re: Usage up to 50% CPU  ("Andres Retzlaff", ) 
>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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