Re: Where is my bottleneck?

From: Markus Schaber <schabi(at)logix-tt(dot)com>
To: Michael Stone <mstone+postgres(at)mathom(dot)us>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Where is my bottleneck?
Date: 2006-02-02 12:14:55
Message-ID: 43E1F7BF.2050100@logix-tt.com
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Hi, Michael,

Michael Stone wrote:

>> I have a performance problem and I don't know where is my bottleneck.
>
> [snip]
>
>> Most of the time the idle value is even higher than 60%.
>
> It's generally a fairly safe bet that if you are running slow and your
> cpu is idle, your i/o isn't fast enough.

Or the query is misoptimized (low work_mem, missing indices) and cause
much more I/O than necessary.

HTH,
Markus

--
Markus Schaber | Logical Tracking&Tracing International AG
Dipl. Inf. | Software Development GIS

Fight against software patents in EU! www.ffii.org www.nosoftwarepatents.org

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