Topic Last Modified: 2006-11-22
The Microsoft® Exchange Server Analyzer Tool uses the Exchange Server User Monitor (ExMon) tool to determine whether user MAPI operations are taking longer than should reasonably be expected on a healthy Exchange server.
As part of its analysis, the Exchange Server Analyzer reviews the ExMon data for user-issued MAPI SaveChangesMessage operations that have taken longer than 30 seconds to be completed.
The MAPI SaveChangesMessage operation is called when an application is saving the content and or the properties of a message to the server. The time that is required to complete the operation depends on the data written, the speed of the database and the transaction log disks being written to, and whether a resource bottleneck is present.
If the Exchange Server Analyzer determines that a user-issued MAPI SaveChangesMessage operation has taken longer than 30 seconds, the Exchange Server Analyzer displays an error.
MAPI SaveChangesMessage operations taking longer than 30 seconds may not always be a problem. Saving large amounts of message data or file attachments could cause the MAPI SaveChangesMessage operation to take longer than normal. If the user or users are experiencing frequent delays, or delays that adversely affect their messaging experience, the most likely cause is a disk bottleneck.
For More Information
- For more information about disk bottlenecks, see Disk Bottleneck
- For more information about Exchange Server performance, see the
Exchange Server 2003 Performance and Scalability Guide
- For more information about how to troubleshoot Exchange Server
performance issues, see Troubleshooting Microsoft Exchange
Server 2003 Performance (http://go.microsoft.com/fwlink/?LinkId=47588).
- For more information about best practices for designing storage
architectures, see Best Practices Common to Multiple
- For more information about how to move user mailboxes to reduce
server load, see Move User Mailboxes to
- For more information about disk sizing, latency, and I/O rates,
see the following blogs on the Microsoft Exchange Team Blog Web
- "A few basic concepts in disk sizing" (A few basic concepts in
disk sizing (http://go.microsoft.com/fwlink/?linkid=39538)
- "Some more thoughts on disk IO and calculations…." (http://go.microsoft.com/fwlink/?linkid=39539)
- How to Calculate Your Disk I/O Requirements (http://go.microsoft.com/fwlink/?linkid=69747)
- "A few basic concepts in disk sizing" (A few basic concepts in disk sizing (http://go.microsoft.com/fwlink/?linkid=39538)