Re: Exchange 2003 Performance - Excessive RPC Ops & MAPI Connections?

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

How big are your user's MB, in particular your BES users.

James Chong
MCSE M+, S+, MCTS, Security+
msexchangetips.blogspot.com

exx wrote:
I'm experiencing some performance issues with Exchange2003. Basically the
Outlook dialog box occasionally pops up saying it's trying to retrieve data
from the Exchange server. I've run a lot of stats and have determined that
for the most part it's Disk I/O so I've been working on that, but I'm
beginning to think the load generated on the server and causing the high
Disk I/O may be due to the unusually high RPC ops.

Current Disk Config is:
C: - Raid1 (2 disks) - Pagefile, Temp, Tracking Logs
D: - Raid5 (3 disks) - DB, Queues
E: - SAN - Transaction Logs
For the above disk config I will be adding a few more disks shortly to
spread everything out.

I've run the Exchange Performance analyzer which has basically come back and
reported that there is excessive RPC usage on the server (0.372
operations/sec) when the suggested max is 0.25. I've installed Quest
Spotlight on Exchange which shows a great deal of useful information.. but
I'm scratching my head over these figures:

545 Connected Users - This sounds right.
1140 Active Connections in the last 10 minutes
3110 MAPI Connections

Any ideas why the MAPI connections would be so high? That seems excessive to
me.
I'd break down the 545 currently connected users into:
60 OWA
40 RPC over HTTP (Currently not configured for cached mode. I've read this
should be changed. Thoughts?)
445 Outlook (None should be in cached mode. Is there an easy way to tell in
ExMon?)

Also, we have 70 BES (Blackberry Enterprise Server) users.

Any suggestions on how I can track this down further? I'm running ExMon on
the server. There is no single user that really sticks out, just occasional
CPU % spikes by what appears to be mostly BES users.

Thanks!

.

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