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  • Where has all the space gone!

    We have an exchange database on SBS 2003 which is regualary exceeding the 75GB limit and is shutting down regularly as a result.

    Now... I know all the mailboxes don't add up to 75GB. I've run an offline defrag using eseutil and it hardly made a dent. So where is all the sace being taken up?

    I've attached some screen shots to illustrate the problem. The .old files are copies of the Exchange db before the offline defrag.

    What else can I do?
    Attached Files

  • #2
    Re: Where has all the space gone!

    your streaming file is 25gb, your store is 50gb or so..
    almost suggets things aren't being commited ?
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    • #3
      Re: Where has all the space gone!

      Adding up the mailboxes will never equal the size of the store. That is because ESM doesn't show you the true size of the databases.

      "When you view the space that a mailbox uses in Exchange System Manager, the amount only includes the space that is used by the Priv.edb file. The amount does not include the space that the Priv.stm file uses. " Source : http://support.microsoft.com/kb/828070/

      Furthermore, an offline defrag on Exchange 2003 SP2 was a waste of time, because the information store size already takes in to account the amount of white space in the database. That is reported also by event ID 1221.

      What is your deleted item retention set to? If it is set very high then it could be that you are holding a lot of deleted content in the database that hasn't been flushed out.

      Simon.
      --
      Simon Butler
      Exchange MVP

      Blog: http://blog.sembee.co.uk/
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      Sembee is a registered trademark, used here with permission.

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      • #4
        Re: Where has all the space gone!

        Ok here is what i did to get it to defrag properly and reduce the space down from 75GB to 17GB. Not sure which one helped though:

        - Ran an NTBACKUP of the exhange (http://www.petri.com/backup_exchange...h_ntbackup.htm)

        - set the 'Keep deleted Items for (days)' period to 0

        - set the 'Keep deleted mailboxes (days)' period to 0
        http://exchangepedia.com/blog/2008/0...retention.html

        - ran a defrag with eseutil with the (/t option for speed) temporary file option. http://support.microsoft.com/kb/192185

        - all done and nicely compacted

        note: I also had to update eseutil to the latest version.
        Attached Files
        Last edited by tonsai; 23rd June 2009, 13:08. Reason: tidied up

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        • #5
          Re: Where has all the space gone!

          Well done.

          Just for future reference the /t option has no bearing on the speed of the defrag. The /t option is for setting the path for the temporary defrag file. Without the /t option set the temporary defrag file is the current location (wherever eseutil is running from).

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          • #6
            Re: Where has all the space gone!

            Originally posted by joeqwerty View Post
            Well done.

            Just for future reference the /t option has no bearing on the speed of the defrag. The /t option is for setting the path for the temporary defrag file. Without the /t option set the temporary defrag file is the current location (wherever eseutil is running from).
            apologies correct. Attached is the actual command I used:

            I think I read somewhere that is is best to defrag to the same location for speed, if you have enough space!
            Attached Files
            Last edited by tonsai; 23rd June 2009, 13:46. Reason: typo

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            • #7
              Re: Where has all the space gone!

              I guess it all depends on your underlying disk configuration (Raid, channels, etc.). Thanks for posting back.

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              • #8
                Re: Where has all the space gone!

                Originally posted by tonsai View Post
                - set the 'Keep deleted Items for (days)' period to 0
                - set the 'Keep deleted mailboxes (days)' period to 0
                I'd wager that's what dropped the file size. I sincerely hope you have the mailboxes archived to DVD for retention, as well as notified the users of the deleted items being set to 0. Too many end users use that as storage for some stupid reason.
                ** Remember to give credit where credit is due and leave reputation points where appropriate **

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