%1 (%2) %3Database ‘%4’: Background clean-up skipped pages. The database may benefit from widening the online maintenance window during off-peak hours. If this message persists, offline defragmentation may be run to remove all skipped pages from the database.

Details
Product: Exchange
Event ID: 602
Source: ESE
Version: 8.0
Symbolic Name: MANY_LOST_COMPACTION_ID
Message: %1 (%2) %3Database ‘%4’: Background clean-up skipped pages. The database may benefit from widening the online maintenance window during off-peak hours. If this message persists, offline defragmentation may be run to remove all skipped pages from the database.
   
Explanation

This Warning event indicates that the background cleanup skipped pages. This message indicates that an offline defragmentation of the Exchange store database should be performed. Offline defragmentation should be performed on each database separately.

   
User Action

To resolve this Warning, perform offline defragmentation of the Exchange store database by using the Eseutil.exe utility with the /d switch to defragment the database file.

The disk space required is equal to twice the size of the database processed.

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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