troubleshooting Question

Exchange Average Disk Queue Length

Avatar of sybadmin1040
sybadmin1040Flag for Afghanistan asked on
43 Comments1 Solution5409 ViewsLast Modified:
My Microsoft Exchange server will "radomly" slow down to the point where Outlook clients will intermittently receive the message "Outlook is trying to retrieve data from the Microsoft Exchange server".  When I run performance monitor on the server at these times, Average Disk Queue Length is pegged at 100%.  We had an Exchange health check performed and was told everything was fine.  I recently replaced the HP Smartarray controller card and the batteries are fully charged and hardware level caching is enabled.  We have 3 partitions (1-100gb, 1-300gb - both on the same RAID 5 array; and an additional 200gb on a separate RAID 5 array).  I know that RAID 5 isn't the "best practice" for Exchange, but, we went this route for other reasons (internal demands for journalling).  Journalling is now disabled.  There is more than enough disk space available.  The server has 4gb of RAM, has PAE enabled, and the drives are 10K (15K would be better).  Does anyone know of anything that would cause this spike of activity and slow down Outlook clients?
Join the community to see this answer!
Join our exclusive community to see this answer & millions of others.
Unlock 1 Answer and 43 Comments.
Join the Community
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 1 Answer and 43 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros