From: Markus Schaber <schabi@logix-tt.com>
To: Michael Stone <mstone+postgres@mathom.us>
Cc: pgsql-performance@postgresql.org
Subject: Re: Where is my bottleneck?
Date: Thu, 02 Feb 2006 13:14:55 +0100
Message-ID: <43E1F7BF.2050100@logix-tt.com> (raw)
In-Reply-To: <20060130110047.GB9976@mathom.us>
References: <43D67496.2020203@androme.es>
<20060130110047.GB9976@mathom.us>
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-performance@postgresql.org
Cc: schabi@logix-tt.com, mstone+postgres@mathom.us
Subject: Re: Where is my bottleneck?
In-Reply-To: <43E1F7BF.2050100@logix-tt.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox