Hi everyone,

i want to know  what the white spice and I want to know when you need the database to defragment?

i ran the blow command in my server i got the below result i need to understand this result please:

[PS] C:\>Get-MailboxDatabase -Status | select name,AvailableNewMailboxSpace

Name                                                        AvailableNewMailboxSpace
----                                                        ------------------------
QAQCValidation                                              8.216 GB (8,821,997,568 bytes)
EMPLOYEE-DB                                              12.11 GB (12,999,852,032 bytes)
NewDatabase                                                 74.81 MB (78,446,592 bytes)
A2015DB                                                   3.324 GB (3,568,926,720 bytes)

thanks in advance

I suggest you create new mailboxdatabase and move all the mailboxes including system/arbitration mailboxes.

Please check these
http://blogs.technet.com/b/exchange/archive/2014/03/17/this-mailbox-database-contains-one-or-more-mailboxes.aspx

https://technet.microsoft.com/en-us/library/aa997931(v=exchg.150).aspx

FYI  AvailableNewMailboxSpace is the logical space within a store that is available for Exchange to reuse when messages are deleted and purged from the da

thanks for reply MAS,

i am using exchange 2010 standard 

maximum database must be created is 5  now i have 4 database 

Creation of a new database and the transfer of databases mailbox  from one of the databases to the new database and after moved all mailbox delete it ...and so on.

Is there any damage(harm) or effect if you leave the situation as it is...?

thanks again for reply.

If you have enough free space and running an Exchange known backup daily you can keep it as it is.

Exchange known backup will truncate the logs which will clear up the logs.

 I am take backup every 3 days now i have free space more than 90GB in first Disk

and in second one i have more than 70 GB free space 

thanks again

12GB of whitespace is not really worth saving considering you either need to do an offline defrag which can be many hours of downtime or more depending on the database size and so is not recommended or you need to move the mailboxes to a different database and delete this database which means you need enough free space for this. I would leave the databases as they are. As a side note, Exchange does its own maintenance which includes database compaction, defragmentation and checksumming - http://blogs.technet.com/b/exchange/archive/2011/12/14/database-maintenance-in-exchange-2010.aspx.

Later down the line when you start to run out of space on a drive then you can either extend the disk (if using a SAN volume or VM) or create a new disk with a new mailbox database and move some mailboxes. Another option could be to create a new mailbox server.

Let me know if this answers your question.

Thanks.

Hi,

Please use the below mentioned command to check the actual white space in the exchange database . http://blogs.technet.com/b/rmilne/archive/2013/08/20/how-to-check-database-white-space-in-exchange.aspx

If you have DAG , you can refer to the below blog to complete defragmenting:

http://blogs.technet.com/b/rmilne/archive/2013/08/23/offline-defrag-and-dag-databases_2c00_-oh-my_2100_.aspx

Regards,

David 

I hope above suggested references clarifies you concern.

White space is the database storage area that has become available for storing new data because of the deletion of existing data. To get in more details on database defragmentation and ways to find the white space in Exchange Database, please have a look on this informative blog post that might helps you: http://www.lepide.com/blog/the-puzzling-mathematics-of-white-space-in-exchange-database/

You may also take help from below given earlier discussed thread having suggested solution that might helps you to get this job done -

When to Defrag an Exchange database: https://community.spiceworks.com/topic/928049-when-to-defrag-an-exchange-database
Exchange 2010 white space: https://social.technet.microsoft.com/Forums/en-US/6b10d818-6391-45c7-924a-7140b302929a/exchange-2010-white-space?forum=exchange2010

Hope it helps you!

• Edited by J Philip 1 hour 5 minutes ago
• Proposed as answer by David Wang_Microsoft contingent staff, Moderator 23 minutes ago

thanks for all ,

Your suggestions satisfactory for me.

i think better option is create new mailbox database and move all mailbox user to this database because it safe option.
to avoid downtime or other circumstances.

thanks for your effort and time.

I hope above suggested references clarifies you concern.

White space is the database storage area that has become available for storing new data because of the deletion of existing data. To get in more details on database defragmentation and ways to find the white space in Exchange Database, please have a look on this informative blog post that might helps you: http://www.lepide.com/blog/the-puzzling-mathematics-of-white-space-in-exchange-database/

You may also take help from below given earlier discussed thread having suggested solution that might helps you to get this job done -

When to Defrag an Exchange database: https://community.spiceworks.com/topic/928049-when-to-defrag-an-exchange-database
Exchange 2010 white space: https://social.technet.microsoft.com/Forums/en-US/6b10d818-6391-45c7-924a-7140b302929a/exchange-2010-white-space?forum=exchange2010

Hope it helps you!

• Edited by J Philip Monday, September 14, 2015 6:17 AM
• Proposed as answer by David Wang_Microsoft contingent staff, Moderator Monday, September 14, 2015 6:59 AM