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No database session was available to satisfy a request on a database

 

Topic Last Modified: 2007-11-16

The Microsoft Exchange Server 2007 Management Pack for Operations Manager monitors the Windows Application log on computers that are running Exchange Server 2007 and generates this alert when the event or events specified in the following Details table are logged.

To learn more about this alert, if you are using Microsoft Operations Manager 2005, do one or more of the following:

  • From the Operator Console, select this alert, and then click the Properties tab. Review the description of the alert that includes the variables specific to your environment.

  • From the Operator Console, click the Events tab, and then double-click the event in the list for which you want to review the event description. Review the events that have been logged that meet the criteria of this Operations Manager alert.

To learn more about this alert, if you are using System Center Operations Manager 2007, do one or more of the following:

  • From the Operations Console, double-click this alert, and then click the General tab. Review the description of the alert that includes the variables specific to your environment.

  • From the Operations Console, double-click this alert, and then click the Alert Context tab. Review the events that have been logged that meet the criteria of this Operations Manager alert.

 

Product Name

Exchange

Product Version

8.0 (Exchange Server 2007)

Event ID

1164

Event Source

MSExchangeIS*

Alert Type

Warning

MOM Rule Path

Microsoft Exchange Server/Exchange 2007/Mailbox/Information Store

MOM Rule Name

No database session was available to satisfy a request on a database.

This Error event indicates that there are not enough available database sessions to support the current level of activity on this storage group.

To resolve this error, increase the number of available database sessions. There are two ways to change this setting:

  • Use ADSIedit to set the parameter msExchESEParamMaxSessions on the Exchange Information Storage group object. For an overview of ADSIedit, see ADSIedit Overview in the Microsoft Windows Server TechCenter.

  • If the above parameter is not set then the available sessions are calculated from the following attributes on the Exchange Information Storage group object:

    • msExchMaxPoolThreads (default value 4)

    • msExchMaxThreads (default value 100)

    • msExchBackgroundThreads (default value 57)

The number of available sessions is set by adding the above 3 values together using the following formula; msExchMaxPoolThreads*number of processors)+msExchBackgroundThreads+(msExchMaxThreads*3/4).

To search the Microsoft Knowledge Base articles based on criteria that generated this alert, visit the Search the Support Knowledge Base (KB) Web site.

To review Exchange 2007 event message articles that may not be represented by Exchange 2007 alerts, see the Events and Errors Message Center.

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.

 
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