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 has exceeded the size limit of %3 GB. If the logical size of this database is not reduced to less than the maximum size limit, this database will be dismounted the next time a database size check is performed.

Details
Product: Exchange
Event ID: 9689
Source: MSExchangeIS
Version: 8.0
Symbolic Name: msgidMaxDbSizeExceededDismountPending
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 has exceeded the size limit of %3 GB. If the logical size of this database is not reduced to less than the maximum size limit, this database will be dismounted the next time a database size check is performed.
   
Explanation

This Error event indicates that the Microsoft Exchange Information Store database has reached 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 a computer that is running Microsoft Exchange Server 2007 Standard Edition Service Pack 1 (SP1) whose Information Store database size is approaching the default limit of 250 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. The code for Exchange 2007 SP1 sets a default database size limit of 250 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.

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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 has exceeded the size limit of GB.If the logical size of this database is not reduced to less than the maximum size limit, this database will be dismounted the next time a database size check is performed.

Details
Product: Exchange
Event ID: 9689
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 has exceeded the size limit of <number> GB.If the logical size of this database is not reduced to less than the maximum size limit, this database will be dismounted the next time a database size check is performed.
   
Explanation

This event is logged if the first size check after a database is mounted identifies the logical size of the database to be greater than the limit that 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 a database equals the physical size of the .edb file and the .stm file minus the logical free space in each. By default, Exchange Server checks the size of each Exchange database at 5 hours after midnight (5:00 AM). The database specified in the event text has been dismounted.

Because this event indicates that you have reached the maximum database size, you should take immediate administrator action to avoid any disruption of e-mail service for your users. The database that has exceeded the database size limit will be dismounted the next time the size check determines that the size limit has been exceeded.

  • By default, the size limit of each database on a server running Exchange Server 2003 Standard Edition is 16 GB. After you install Exchange Server 2003 Service Pack 2 (SP2), the default size limit for each Exchange database is 18 GB. Additionally, you can configure database size limits of up to 75 GB per database on servers running Exchange Server 2003 SP2.
  • By default, the size limit of each database on a server running Exchange Server 2003 Enterprise Edition is 8,000 GB. This limit is generally a theoretical limit. The actual limit of an Exchange database is limited based on your server hardware and on the hardware of your storage subsystem. After you install Exchange Server 2003 SP2 or later, you can customize the database size limit to a value up to 8,000 GB.

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:

  • 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.

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