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9.0

Exchange Server 2003 Disk Performance Issue

Asked by rigneydolphin in Windows 2003 Server, Computer Hard Drives, Storage Technology

Tags: Exchange Server 2003 Service Pack 2 RAID 5 DISK TIME IDLE TIME Perfmon arrat performance degradation disk queue length

Hi,

For the last number of weeks we have been experiencing extremely bad performance on our exchange server. The end users complain of problem's using outlook where the connection to the server drops and opening emails slows down to a snails pace, also applications hosted on the server are running very slow.  It seems that the the physical hard disks are the bottleneck causing the performance degradation.

We are running an IBM xSeries 346 server with Exchange Server 2003 SP2 installed. The RAID is configured in RAID 5 with 3 X 68.4GB HD's (7200rpm) resulting in one logical drive of 136GB.

When we monitor the server performance using perfmon we notice that the end users slow performance relates exactly to when the %DiskTIme goes above 100 and also the %Current Disk Queue Length gets quite high. (I have attached a sample screenshot below)

Since we currently only have 3 hard disks in use would the introduction of extra disks result in an improved performance ? The server RAID manager doesn't report any errors but doesn't show performance statistics,  is there another way I can monitor the RAID performance on my server? What else should i be looking at here?



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Exchange Perfmon
Exchange Perfmon
 
[+][-]11/06/09 04:38 PM, ID: 25764365Accepted Solution

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About this solution

Zones: Windows 2003 Server, Computer Hard Drives, Storage Technology
Tags: Exchange Server 2003 Service Pack 2 RAID 5 DISK TIME IDLE TIME Perfmon arrat performance degradation disk queue length
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Solution Provided By: davorin
Participating Experts: 4
Solution Grade: A
 
[+][-]11/06/09 03:00 PM, ID: 25763829Expert Comment

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[+][-]11/06/09 03:06 PM, ID: 25763872Expert Comment

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[+][-]11/08/09 04:27 PM, ID: 25772723Expert Comment

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[+][-]11/09/09 07:49 AM, ID: 25776921Expert Comment

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