I would first look in to this whitepaper - http://www.microsoft.com/technet/prodtechnol/exchange/2003/library/e2k3p erf.mspx
It goes over how to troubleshoot performance bottlenecks on your exchange server. There are many factors that could attribute to this RPC dialog box such as disk and network latencies, 3rd party outlook addin's, etc. Server side, do you have any AV software interacting with the store? If so, then I would check your Virus Scan queue length in perfmon to see if there are a lot of scans going on. High RPC requests on the store will cause these dialog boxes as we are only allowed 100 requests at any given time. The event that you are seeing in the log is being reported when you have Client Monitoring set to Minimum on your IS. Outlook 2003 clients by default send this extra data on the end of RPC packets to report latency and connectivity issues to the exchange server. The store just takes that data, calculates it and spits it out in the 9640, 9641, and 9642 events in the application log. The adapter speed setting is what the client is set to, not the exchange server, so if that is the case, are you running on a switched or shared network? Open Messages/Open Attachments on the store may show you if there are any users with a lot of these open which can cause performance issues. If the Outlook 2003 users are all in cached mode and they are all downloading OAB's, then this could be a problem in the morning, but not in the afternoon as the OAB should only be generated once a day and if there are any changes, the Outlook client should only be downloading incrementals of the OAB and not fulls. Outlook 2003 clients download the OAB every 24 hours and this time is derived when a user opens their Outlook client, so everyone should be downloading this at different times. Performance monitor would be your best bet to start troubleshooting this and take those numbers and compare that against the link I sent above. ExBPA at http://www.exbpa.com now has performance analysis, so when starting it, select the Performance check. This check takes 2 hours to complete, but pulls most of the performance counters from the troubleshooting whitepaper for you. Hope this helps. Mike -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jonathan Beeler Sent: Thursday, July 21, 2005 9:56 AM To: Exchange Discussions Subject: high processor utilization in e2k3 windows 2k3 e2k3 sp1 cluster - dual proc (hyper-threaded) 3GB RAM clients - outlook 2k3 (cached-mode) - most of them We're having a problem on one of our mailbox servers where outlook gives the infamous message "Outlook is requesting data from the server Or Outlook is trying to retrieve data from ". Uniquely enough, it happens to our cached mode as well as live mode clients. My suspicion is that there are network problems with this machine (switch, card, line, etc.) When I checked the server during this occurrence, the processor was pinned at 100% with the store process utilizing the most. It stayed in this state for almost 2 minutes straight, before dropping down to the 30-40% level. There were no backups running, and I tried to search to see if anyone sent any unusually large messages to a bunch of people - this wasn't the case. I had turned up logging on IS and there are two things that I found: The first is that a lot of clients are performing OAB downloads (we had the clients configured for this fairly frequently during the migration from Groupwise - this will be changed, but I don't think that this is the core of the problem) The other information that I kept getting was this: Only 72% of user 's 37 attempted RPCs have succeeded in the past 14 minute(s) (which is less than the threshold of 75%)). Adapter Speed: 10000 kbps Machine Name: xxxx.domain.com Client Mode: Cached This last message indicates to me that there might be some network problems. your thoughts would be appreciated. Thanks! _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/read/?forum=exchange To subscribe: http://e-newsletters.internet.com/discussionlists.html/ To unsubscribe send a blank email to [EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. Attn: Discussion List Management 475 Park Avenue South New York, NY 10016 Please include the email address which you have been contacted with. _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/read/?forum=exchange To subscribe: http://e-newsletters.internet.com/discussionlists.html/ To unsubscribe send a blank email to [EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. Attn: Discussion List Management 475 Park Avenue South New York, NY 10016 Please include the email address which you have been contacted with.
