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Exchange - Net Admin - Outlook Microsoft Exchange Exchange and a Global Mailbox Folder Internal Email Address Options when a Staff Member Prerequisites for Exchange |
Microsoft Exchange Server Page Last Reviewed: 15/02/2009
A common posting on newsgroups and forums from new Exchange administrators is when they look the event logs on their Exchange server and find this:
They then post a message about their Exchange server running out of space, and how to increase it. What does this message mean? What it means is that Exchange has carried out some routine maintenance on the Exchange database. Any old data that is past the delete thresholds has been deleted from the database. What happens if the size is very large? It depends what you mean by large, and how large your Exchange database is. Can I reclaim that space? Exchange will use that space, so if your Exchange server is used heavily, then that space could be used up very quickly. The decision to do an offline defrag should be weighed up carefully.
Running eseutil.exe on the database should NOT be considered routine, or part of the maintenance of the server. Exchange looks after itself, and eseutil should only be used on those rare occasions where a large amount of data has been deleted and the space needs to be reclaimed. Does the message have anything to do with the size of the database? No, it doesn't. Why does it cause confusion? This event log ID should have been worded slightly differently - changing the word "free" to "white". This would have given a clearer indication of what has happened. The message would then read like this: "The database "First Storage Group\Mailbox Store (SERVER)" has 1 megabytes of white space after online defragmentation has terminated. " More Information There is more information on the way that Exchange uses the database and the true size of the database in this Microsoft article: http://www.microsoft.com/technet/prodtechnol/exchange/2003/insider/trueamountofspace.mspx | |||||||||||||||||||||||||||||||||
| Last Page Update: 15/02/2009 |
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