Exchange2003 SP2 data base size.....

Posted on 2006-05-02
Last Modified: 2010-04-18
Greetings, Exchanage 2003 with SP2 installed and the size limit was increased to the 18gb size..  after reading how to increase that I have edited the registry and included the the following

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchange\(servername)\Private-(GUID Key #)\

The following changes were added
Database Size Limit in GB   Value of 32 Decimal
Database Size Buffer Warning in Percentage Value 10 Decimal
Database Size Check Start Time in Hours from Midnight Value 6 Decimal

yet when I look at the online derfagmentation I still see it looking at the 18gb limit and reporting the free space available according to that size limit. Though when I reboot the server and veiw the logs I see that it has recorded a 32 gb database and we have the room to grow bigger. Without moving to the Enterprise ver., how can I be sure that when the database goes beyond the 18gb it is not going the shut down database unitl I get everyone to either empty the trash or archive their sent items and other emails?

Question by:Striggs
    LVL 104

    Expert Comment

    The value isn't changed until the server is rebooted.
    Once you have made the change, it will report the maximum database size and then you should be fine.

    There is more information in this article at


    Author Comment

    The question was never answered...  A reboot was done and the logs still reported the same info. only one entery was found stating that it was the 32gb size, yet the free space was not reflecting the full 32 gb. Though I did find that the it did add 1 gb chucks if the database size was getting small or close to the 18gb default size.

    The database "First Storage Group\Mailbox Store (server name)" has 1189 megabytes of free space after online defragmentation has terminated.

    an offline defrag was done and the server has been restated after the new DC was installed...

    sorry I did not get back to you in a timely manner. busy putting in a 2003 DC and BB and working on a WSUS server that and fixing printers.. oh joy.  

    LVL 104

    Accepted Solution

    You should have posted the free space event ID earlier.
    That error message trips up a lot of people. It doesn't mean free space as in the space available until the store hits its limit.

    For "freespace" you should read "white space". That means there is 1.189gb of white space in the database. The store will then use that space first, before expanding the physical size of the database.

    I covered more on event ID 1221 on my web site:


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