Exchange store ‘%1’: The logical size of this database (the logical size equals the physical size of the .edb file minus the logical free space) is %2 GB. This database size is approaching the size limit of %3 GB. If the logical database size exceeds the maximum size limit, it will be dismounted on a regular basis.

Details
Product: Exchange
Event ID: 9688
Source: MSExchangeIS
Version: 8.0
Symbolic Name: msgidApproachingMaxDbSize
Message: Exchange store ‘%1’: The logical size of this database (the logical size equals the physical size of the .edb file minus the logical free space) is %2 GB. This database size is approaching the size limit of %3 GB.
If the logical database size exceeds the maximum size limit, it will be dismounted on a regular basis.
   
Explanation

This Error event indicates that the Microsoft Exchange Information Store database is approaching the maximum size limit. This error may be logged in either of the following scenarios:

  • On a computer that is running Microsoft Exchange Server 2007 Standard Edition whose Information Store database size is approaching the hard-coded limit of 50 gigabytes and has not had the maximum database size increased by using the registry.

  • On an Exchange Enterprise Edition server that has had the maximum database size restricted to the value specified in the error by using the same registry setting.

   
User Action

To resolve this error, locate the key for the Information store in the registry. A sample registry key is: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS\<SERVER NAME>\Private-013e2e46-2cd7-4a8e-bfec-0e4652b94b00

Note   The GUID in this key (Private-013e2e46-2cd7-4a8e-bfec-0e4652b94b00) is an example and should match the value of the objectGUID attribute on the database’s Active Directory directory service object.

Caution   Incorrectly editing the registry can cause serious problems that may require you to reinstall your operating system. Problems resulting from editing the registry incorrectly may not be able to be resolved. Before editing the registry, back up any valuable data.

  • If the value exists, change the value Database Size Limit in GB to the desired size in gigabytes.

  • If the value does not exist, add the DWORD value Database Size Limit in GB and set the value to the desired size expressed in gigabytes.

    Note   The code for Exchange 2007 sets a hard-coded database size limit of 50 gigabytes for the Standard Edition. This can be changed by using the process described here. The Information Store database size for both the Standard and the Enterprise Edition is limited only by disk space.

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.

Related:

Exchange store ”: The logical size of this database (the logical size equals the physical size of the .edb file and the .stm file minus the logical free space in each) is GB. This database size is approaching the size limit of GB.If the logical database size exceeds the maximum size limit, it will be dismounted on a regular basis.

Details
Product: Exchange
Event ID: 9688
Source: MSExchangeIS Mailbox Store
Version: 6.5.7638.0
Component: Microsoft Exchange Information Store
Message: Exchange store ‘<storage group name>‘: The logical size of this database (the logical size equals the physical size of the .edb file and the .stm file minus the logical free space in each) is <number> GB. This database size is approaching the size limit of <number> GB.If the logical database size exceeds the maximum size limit, it will be dismounted on a regular basis.
   
Explanation

This event indicates that the logical size of the database is greater than the threshold you have configured. The text in the event description identifies the database that has exceeded this limit and the current logical size of the database. The logical size of the database equals the physical size of the .edb file and the .stm file minus the logical free space in each. By default, the threshold for logging this warning event is when 90 percent of the maximum logical database size is consumed.

Although this event indicates that you have not yet exceeded the maximum database size, it is important that you take a user action to avoid a disruption in e-mail service for your users. If the maximum database size is reached, Error ID 9689 or Error ID 9690 will be logged and the database will be dismounted on each daily check for database size. See User Action.

If you are running Exchange Server 2003 Service Pack 2 or later, you can configure the maximum database size, the threshold at which a warning event is logged, and the time of day at which database sizes are evaluated. For information about how to configure these settings, see “Configure Database Size Limits” in Exchange Server 2003 SP2 Online Help.

   
User Action

To reduce the size of the database, consider doing the following:

  • Delete mailbox or public folder data that you do not need. For example, ask your users to delete items in their mailboxes or delete public folder data that is not needed.
  • Move mailboxes or public folders from the database to a different database.
  • Note  If you have not configured the size limit for an Exchange database to the maximum allowed size, you may want to increase the size limit for the database specified in the event description. See the Explanation section of this article for the maximum configurable size limits depending on the version of Exchange Server that you are running. However, backup and restore operations will take longer if you increase the size of the database.

For more information about configuring Exchange Server 2003 databases and storage groups, see the following Microsoft Knowledge Base articles:

Related: