RPC Requests - sustained for 5 minutes - Yellow(>25)


Topic Last Modified: 2007-11-16

The Microsoft Exchange Server 2007 Management Pack for Operations Manager includes a performance data collection engine that is used to query performance counter objects on computers that are running Exchange Server 2007. For this Operations Manager rule, data is collected using the performance counter specified in the Details table.

To review the value of the performance counter that generated this alert, in the Operator Console, select this alert, and then click the Properties tab.


Product Name


Product Version

8.0 (Exchange Server 2007)

Event Source


Counter Name

RPC Requests

Sample Interval (in seconds)


Server Role

Ex. Mailbox

Warning Threshold


Critical Error Threshold


MOM Rule Path

Microsoft Exchange Server/Exchange 2007/Mailbox/Information Store

MOM Rule Name

RPC Requests - sustained for 5 minutes - Yellow(>25).

The RPC Requests performance counter records the number of client computer requests that are currently being processed by Microsoft Exchange. The counter has a maximum value of 100. After the Exchange store has 100 remote procedure call (RPC) operations being processed, it denies any new connections. On a healthy server, the number of outstanding requests should be lower than 50. If the number is greater than 50 for a sustained time, this indicates that RPCs are backed up and waiting to be processed, and client computers are probably experiencing delays.

This alert indicates that RPC requests have been greater than 25 for five minutes. This alert may be caused by increased RPC load or a bottleneck in one or more resources.

To resolve this warning, determine the resources that are creating a bottleneck and attempt to mitigate the problem. Possible bottlenecks include disk reads or writes, processor time, available memory, and network configuration.

If you are having difficulty resolving the issue, contact Microsoft Product Support. For information about contacting support, visit the Contact Us page of the Microsoft Help and Support Web site.

If you are not already doing so, consider running the tools that Microsoft Exchange offers to help administrators analyze and troubleshoot their Exchange environment. These tools can help you make sure that your configuration is in line with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. Go to the Toolbox node of the Exchange Management Console to run these tools now. For more information about these tools, see Toolbox in the Exchange Server 2007 Help.

To search the Microsoft Knowledge Base articles based on criteria that generated this alert, visit the Microsoft Help and Support Web site.


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