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E-mail slow down with RPC cancel request dialog box seen at the Outlook clients.

Users have been seeing some e-mail slow down and RPC cancel request dialog box on their Outlook 2003 clients. In order to see if the Exchange 2003 Server is having problems I changed to the mdbperfx.dll (in Performance Monitor). This added a number of new counters which I am unable to find any detailed information about. A few that I am using are listed below.
FXGetBufferRopsCalledPerSec
FXGetBufferRopsDeniedPerSec
FXGetBufferCurrentCallerCount
FXGetBufferCurrentUsersExecting
FXGetBufferRopsCalled

I am seeing a lot of activity on the FXGetbufferRopsCalledPerSec and a little on FXgetBufferCurrentUsersExecting and nothing on FXGetBufferRopsDeniedPerSec. I have the one line discription of these counters from KB Article 818481 but need more.

This is a large Exchange 2003 system with a few thousnad users runing clients with Outlook 2002 and Outlook 2003. I have been following the guidelines in KB Articles 839862, 916783, 9015184 and a few more to troubleshoot the problem.

FXGetBufferRopsDenied sits at about 775. I am not sure how to reset this value or where it is comming form. I would think I should see some activity on the FXGetBufferDeniedPerSec counter if RPC handling was the problem.

Any information would be helpfull.
Thanks,

Sembee

Is this a multiple server site?
Are you seeing this across all servers?

Any reason you picked those particular counters? They certainly are not counters I would have selected for looking at this problem.
If you use the more conventional counters (such as those listed in the performance monitoring guides) are the servers within the thresholds?

Simon.

LenardP

ASKER

Yes this is a multiple server site and the Exchange Server is a Cluster. The reason I am looking at these counters is because I feel that the problem has to do with Outlook cllient synchronizaton. These counters are added to monitor Outlook client sychronizaton see Microsoft KB article 818484. The reason I think it is an RPC problem is because that is how Outlook clients talk to the Exchange Server, see Microsoft KB article 839862. The reason I think it is a RPC server overload problem is because the Outlook clients are deplaying the RPC cancel request dialog box. This pop-up will say somthing like "Outlook is trying to retrieve data from the Microsoft Exchange Server {Server Name}.
I hope this help make clear where I am comming from.
Thanks

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Sembee

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LenardP

ASKER

For anyone trying to troubleshoot the RPC Cancel Request dialog box in Outlook 2003 or in Outlook 2002 see the following one hour plus Webcast for Micorosoft wc062905. This Webcast reviews the problem and how to troubleshoot it along with solutions. It is have to fine bcause it is not referenced much in the Microsoft KB.

Computer101

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Computer101
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