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Exchange 2013 mailbox database whitespace RRS feed

  • Вопрос

  • Hello

    How can we reclaim huge whitespace in an exchange database

    All exchange 2013 servers are running with CU21

    There are many databases where there is huge whitespace and exchange 2013 is not reclaiming the whitespace.

    We moved the mailboxes of about 20GB and in 2 days the database shrunk by 18GB.

    However , the compaction is still not occuring beyond.

    Mailbox movement will be final solution but will modifying the online maintenance affect ?

    Please advise as there are many databases where the issue is observed

    Event 732 and 737 is noticed for the databases


    Regards, Ajit


    9 июля 2020 г. 13:55

Ответы

  • Hello

    How can we reclaim huge whitespace in an exchange database

    All exchange 2013 servers are running with CU21

    There are many databases where there is huge whitespace and exchange 2013 is not reclaiming the whitespace.

    We moved the mailboxes of about 20GB and in 2 days the database shrunk by 18GB.

    However , the compaction is still not occuring beyond.

    Mailbox movement will be final solution but will modifying the online maintenance affect ?

    Please advise as there are many databases where the issue is observed

    Event 732 and 737 is noticed for the databases


    Regards, Ajit


    Move all the mailboxes from the database, then simply remove it once its empty. No reason to defrag it, thats very 1990s.

    • Помечено в качестве ответа Andy DavidMVP 18 июля 2020 г. 12:08
    9 июля 2020 г. 14:09
  • Hello Ajit,

    Online movement is the best option. Create a new database and move mailboxes to the new database. The beauty is Online movement won't impact the user experience


    Regards From: Exchange Online | World of Cloud Computing

    • Помечено в качестве ответа Andy DavidMVP 18 июля 2020 г. 12:08
    9 июля 2020 г. 14:11
    1. White space once freed up via the retention policy will allow that space to be used by new transactions
    2. Online maintenance in short optimizes the data blocks to keep the DB healthy and performant
    3. However the PHYSICAL size of the DB will never decrease UNLESS you take one of the actions below
    4. Two ways to accomplish this are OPTION A: take DB offline and run ESEUTIL /D which will in essence rebuild the DB, however, that can take a substantial amount of time AND while offline users will not be able to access their mailboxes. OPTION B: (Recommended) use the move mailbox process to migrate all MAILBOXES to a new DB without impacting users ability to access their mailboxes and once done, after confirming there are no active users on the old DB, you can dial-tone the DB which you can read more about here, however you would not be restoring any historic data once dial-toned https://support.lucid8.com/support/solutions/articles/6000167684-dial-tone-recovery

    x


    Search, Recover, Export Mailboxes, Contacts, Calendars, Tasks from ALL versions of Exchange Offline EDB's, On-Premises Exchange Databases & Office 365. Export, Migrate/Recover into On-Premises Exchange Server, Office 365 with Lucid8's DigiScope


    • Изменено Troy Werelius 9 июля 2020 г. 14:12
    • Помечено в качестве ответа Andy DavidMVP 18 июля 2020 г. 12:08
    9 июля 2020 г. 14:11
  • Here is a brief summary about replies above. Hope more people with similar issues can get useful information from it.

    Request:

    How can we reclaim huge whitespace in an exchange database. All exchange 2013 servers are running with CU21.

    There are many databases where there is huge whitespace and exchange 2013 is not reclaiming the whitespace.

    We moved the mailboxes of about 20GB and in 2 days the database shrunk by 18GB. However , the compaction is still not occuring beyond.

    Mailbox movement will be final solution but will modifying the online maintenance affect ?

    Suggestions:

    Moving mailboxes to new databases, then deleting old databases is the best option to release whitespace.

    This Exchange Server 2013 - Administration, Monitoring, and Performance Forum will be migrating to a new home on Microsoft Q&A, please refer to this sticky post for more details.

    Regards,

    Lydia Zhou


    Microsoft Online: Migration and Coexistence forum will be migrating to a new home on Microsoft Q&A! We invite you to post new questions in the new forum.

    For more information, please refer to the sticky post.

    • Помечено в качестве ответа Ajit Chandrakant 23 июля 2020 г. 18:52
    17 июля 2020 г. 7:09

Все ответы

  • Hello

    How can we reclaim huge whitespace in an exchange database

    All exchange 2013 servers are running with CU21

    There are many databases where there is huge whitespace and exchange 2013 is not reclaiming the whitespace.

    We moved the mailboxes of about 20GB and in 2 days the database shrunk by 18GB.

    However , the compaction is still not occuring beyond.

    Mailbox movement will be final solution but will modifying the online maintenance affect ?

    Please advise as there are many databases where the issue is observed

    Event 732 and 737 is noticed for the databases


    Regards, Ajit


    Move all the mailboxes from the database, then simply remove it once its empty. No reason to defrag it, thats very 1990s.

    • Помечено в качестве ответа Andy DavidMVP 18 июля 2020 г. 12:08
    9 июля 2020 г. 14:09
  • Hello Ajit,

    Online movement is the best option. Create a new database and move mailboxes to the new database. The beauty is Online movement won't impact the user experience


    Regards From: Exchange Online | World of Cloud Computing

    • Помечено в качестве ответа Andy DavidMVP 18 июля 2020 г. 12:08
    9 июля 2020 г. 14:11
    1. White space once freed up via the retention policy will allow that space to be used by new transactions
    2. Online maintenance in short optimizes the data blocks to keep the DB healthy and performant
    3. However the PHYSICAL size of the DB will never decrease UNLESS you take one of the actions below
    4. Two ways to accomplish this are OPTION A: take DB offline and run ESEUTIL /D which will in essence rebuild the DB, however, that can take a substantial amount of time AND while offline users will not be able to access their mailboxes. OPTION B: (Recommended) use the move mailbox process to migrate all MAILBOXES to a new DB without impacting users ability to access their mailboxes and once done, after confirming there are no active users on the old DB, you can dial-tone the DB which you can read more about here, however you would not be restoring any historic data once dial-toned https://support.lucid8.com/support/solutions/articles/6000167684-dial-tone-recovery

    x


    Search, Recover, Export Mailboxes, Contacts, Calendars, Tasks from ALL versions of Exchange Offline EDB's, On-Premises Exchange Databases & Office 365. Export, Migrate/Recover into On-Premises Exchange Server, Office 365 with Lucid8's DigiScope


    • Изменено Troy Werelius 9 июля 2020 г. 14:12
    • Помечено в качестве ответа Andy DavidMVP 18 июля 2020 г. 12:08
    9 июля 2020 г. 14:11
  • Hello,

    Thank you. I will have to perform this task on 40+ databases .


    Will check more and watch this space for any more updates.

    Thank you all for your valuable time


    Regards, Ajit

    9 июля 2020 г. 20:08
  • Hi,

    Agree with above replies. Moving mailboxes to new databases, then deleting old databases is the best option to release whitespace. Hope everything works well on your side.

    Regards, 

    Lydia Zhou


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

    10 июля 2020 г. 1:30
  • Any updates so far? If you have solved your problem, could you share with us? Maybe it will help more people with similar problems. 

    This Exchange Server 2013 - Administration, Monitoring, and Performance Forum will be migrating to a new home on Microsoft Q&A, please refer to this sticky post for more details.

    Regards,

    Lydia Zhou


    Microsoft Online: Migration and Coexistence forum will be migrating to a new home on Microsoft Q&A! We invite you to post new questions in the new forum.

    For more information, please refer to the sticky post.

    15 июля 2020 г. 9:06
  • Here is a brief summary about replies above. Hope more people with similar issues can get useful information from it.

    Request:

    How can we reclaim huge whitespace in an exchange database. All exchange 2013 servers are running with CU21.

    There are many databases where there is huge whitespace and exchange 2013 is not reclaiming the whitespace.

    We moved the mailboxes of about 20GB and in 2 days the database shrunk by 18GB. However , the compaction is still not occuring beyond.

    Mailbox movement will be final solution but will modifying the online maintenance affect ?

    Suggestions:

    Moving mailboxes to new databases, then deleting old databases is the best option to release whitespace.

    This Exchange Server 2013 - Administration, Monitoring, and Performance Forum will be migrating to a new home on Microsoft Q&A, please refer to this sticky post for more details.

    Regards,

    Lydia Zhou


    Microsoft Online: Migration and Coexistence forum will be migrating to a new home on Microsoft Q&A! We invite you to post new questions in the new forum.

    For more information, please refer to the sticky post.

    • Помечено в качестве ответа Ajit Chandrakant 23 июля 2020 г. 18:52
    17 июля 2020 г. 7:09