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From: Ron <rjpeace@earthlink.net>
To: Thomas Harold <tgh@tgharold.com>
To: pgsql-performance@postgresql.org
Subject: Re: two disks - best way to use them?
Date: Tue, 06 Dec 2005 03:12:31 -0500
Message-ID: <6.2.5.6.0.20051206030948.01dd4bb0@earthlink.net> (raw)
In-Reply-To: <4395273B.90902@tgharold.com>
References: <00fb01c5f772$59471410$0200a8c0@dell8200>
	<6.2.5.6.0.20051202145746.01dc7b68@earthlink.net>
	<43946148.9010607@tgharold.com>
	<Pine.LNX.4.62.0512050808440.2807@qnivq.ynat.uz>
	<43946EA1.8090908@tgharold.com>
	<Pine.LNX.4.62.0512051950560.2807@qnivq.ynat.uz>
	<4395273B.90902@tgharold.com>

At 12:52 AM 12/6/2005, Thomas Harold wrote:
>David Lang wrote:
>
>>in that case you logicly have two disks, so see the post from Ron 
>>earlier in this thread.
>
>And it's a very nice performance gain.  Percent spent waiting 
>according to "top" is down around 10-20% instead of 80-90%.  While 
>I'm not prepared to benchmark, database performance is way up.  The 
>client machines that are writing the data are running closer to 100% 
>CPU (before they were well below 50% CPU utilization).
For accuracy's sake, which exact config did you finally use?

How did you choose the config you finally used?  Did you test the 
three options or just pick one?

Ron





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