LDAP Search Timeouts - sustained for 5 minutes - Red(>20)
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.
Details
Product Name |
Exchange |
Product Version |
8.0 (Exchange Server 2007) |
Event Source |
MSExchange ADAccess Domain Controllers |
Counter Name |
LDAP Searches timed out per minute |
Instance Name |
<All> |
Sample Interval (in seconds) |
60 |
Server Role |
Ex. Common |
Critical Error Threshold |
>20 |
MOM Rule Path |
Microsoft Exchange Server/Exchange 2007/Common Components/Active Directory Access |
MOM Rule Name |
LDAP Search Timeouts - sustained for 5 minutes - Red(>20). |
Explanation
The LDAP Searches timed out per minute performance counter shows the number of LDAP search requests that timed out during the last minute. The average value should be less than 10 and the maximum value should not exceed 20.
This alert indicates that more than 20 LDAP searches per minute timed out for five minutes. This can be caused by a network connectivity loss between the Microsoft Exchange Server computer and the Active Directory directory service domain controller, a problem with the domain controller computer, or severe performance problems.
User Action
To resolve this error, do one or more of the following:
Verify network connectivity between the Exchange Server computer and the domain controllers it uses.
Verify that the domain controllers the Exchange Server computer uses are available.
Verify that the domain controllers the Exchange Server computer uses are not experiencing severe performance problems. You can investigate CPU usage, as well as disk and memory bottlenecks, on your Active Directory servers.
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.
For More Information
To search the Microsoft Knowledge Base articles based on criteria that generated this alert, visit the Microsoft Help and Support Web site.