ESE Log Generation Checkpoint Depth - sustained for 15 minutes - Red(>4000) - Mailbox


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

MSExchange Database ==> Instances

Counter Name

Log Generation Checkpoint Depth

Instance Name


Sample Interval (in seconds)


Server Role

Ex. Mailbox

Critical Error Threshold


MOM Rule Path

Microsoft Exchange Server/Exchange 2007/Mailbox/Information Store

MOM Rule Name

ESE Log Generation Checkpoint Depth - sustained for 15 minutes - Red(>4000) - Mailbox.


The Log Generation Checkpoint Depth performance counter reports the number of transaction log files that have not yet been saved to the database. This number represents the number of transaction log files that must be replayed to the database if the Microsoft Exchange Information Store service process (Store.exe) stops and needs to be restarted. As the log file generation depth increases, the Exchange Information Store startup time increases. If the transaction log file depth of a storage group reaches 5,000, the Extensible Storage Engine (ESE) dismounts all the databases that are in the affected storage group.

This alert indicates that the checkpoint depth is greater than 4000. The transaction log file depth may grow during periods when the server is busy. However, large values typically occur when there is a failure or when a backup fails.

User Action

To resolve this critical error, do one or more of the following:

  • Check if there is a failure, or if there is any application causing the Exchange Information Store to fail. Resolve the cause of the failure so that the checkpoint depth will start to decrease.

  • Check if there is a backup process that has failed.

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.