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.This database will be dismounted immediately.

Details
Product: Exchange
Event ID: 9690
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.This database will be dismounted immediately.
   
Explanation

This event is logged if the size check identifies that the logical size of the database is greater than the limit 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, Exchange Server checks the size of each Exchange database at 5 hours after midnight (5:00 AM).

When this event is logged, the database specified in the event description is dismounted. You must take immediate administator action to minimize the disruption in e-mail service for your users.

    Note   Event ID 9689 is logged the first time that the logical size of the database is greater than the limit you have configured.

  • 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, 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 restore e-mail service for your users, restart the database specified in the event description.

    Note  Although you can temporarily restart the database to allow your users to access e-mail and public folder data, the database will be dismounted on each daily check that determines that the logical size limit for the database has been exceeded.

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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