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How to reduce size of EDB & STM files

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How to reduce size of EDB & STM files - 10.Aug.2008 4:22:15 AM   
generalkw

 

Posts: 19
Joined: 7.Aug.2008
Status: offline
Hello everyone
we r using exchange 2003, i m facing one problem
if u increase the storage limit of any user, so when user start storing mails,
it also increase the size of EDB & STM database files
after that when u decrease the storage limit of that user, and user also delete the mails
thenafter the size of EDB & STM files remain same....
i search abt it i found something called white space
i just want to knw how to overcome this problem....bcoz i m not able to take backup
Thanks
Post #: 1
RE: How to reduce size of EDB & STM files - 10.Aug.2008 5:32:29 AM   
123raghu

 

Posts: 68
Joined: 18.Mar.2008
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Hiya,

You need to perform an offline defragmentation of the database files (EDB & STM)...check out the KB article for more infor....http://support.microsoft.com/kb/328804.....

_____________________________

It is not how much you do, but how much love you put in the doing......

Cheers,
Raghu
Raghuv@live.com

(in reply to generalkw)
Post #: 2
RE: How to reduce size of EDB & STM files - 11.Aug.2008 2:01:12 AM   
generalkw

 

Posts: 19
Joined: 7.Aug.2008
Status: offline
hey Raghu Thanx for the Reply
but i did it already then after its same......some person suggest me that
u need to create new mailbox store and transfer all ur mail box to that store....
is it the only way to solve this problem........????????

(in reply to generalkw)
Post #: 3
RE: How to reduce size of EDB & STM files - 11.Aug.2008 9:58:40 AM   
Sembee

 

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Joined: 17.Jan.2008
From: Somewhere near London, UK
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The Exchange database will never shrink in physical size.
If you remove content then after the deleted item retention period has expired the space will be marked as "white space". This white space is then used by Exchange first, before further increasing the physical size of the database.

You can see how much white space is in the store by looking for event ID 1221 overnight.

As Exchange uses the white space, doing an offline defrag or moving the mailboxes to a new store (only possible on Enterprise edition or Exchange 2007) is only worth it if there will be a significant gain in space AND you are not going to use that space again.

If you are unable to backup the store because of space available then you need to look at your backup solution and change it. If you need to store email then users will find ways of storing it - PST files for example.

Simon.

_____________________________

Simon Butler,
Exchange MVP
Blog: http://blog.sembee.co.uk/
Web: http://www.amset.info/
In the UK? Hire me: http://www.sembee.co.uk/
Exchange Resources: http://exbpa.com/

(in reply to generalkw)
Post #: 4
RE: How to reduce size of EDB & STM files - 12.Aug.2008 3:52:32 AM   
tagwar

 

Posts: 54
Joined: 13.Jan.2008
From: Egypt
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Dear Mr.
you always give very nice responce
i am following you answers and collect experiance.

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Post #: 5
RE: How to reduce size of EDB & STM files - 12.Aug.2008 4:54:37 AM   
generalkw

 

Posts: 19
Joined: 7.Aug.2008
Status: offline
Thanx Simon Butler
      i checked my event viewer with ID 1221 its showing tht 759 MB space for one mail box store, but physically it using more than 3 GB........so overall i understand the logic behind it, that how it works......so i ll make new mailbox store and transfer all my mailbox to that new store.....but wht abt the retention deleted items, it would be transfer with all mailboxes or it would be lost........?????
Thanx & Regards
A.K. Kothi
Kuwait

(in reply to tagwar)
Post #: 6
RE: How to reduce size of EDB & STM files - 12.Aug.2008 6:56:42 AM   
Sembee

 

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From: Somewhere near London, UK
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Move Mailbox does not preserve content in Deleted Item Retention. It will preserve contents in the Deleted Items folder though.

Simon.

_____________________________

Simon Butler,
Exchange MVP
Blog: http://blog.sembee.co.uk/
Web: http://www.amset.info/
In the UK? Hire me: http://www.sembee.co.uk/
Exchange Resources: http://exbpa.com/

(in reply to generalkw)
Post #: 7
RE: How to reduce size of EDB & STM files - 12.Aug.2008 5:34:47 PM   
ratishnair

 

Posts: 154
Joined: 29.Jul.2008
Status: offline
Give me the info:

1. Version of Exchange, STD or ENT
2. Size of edb and stm files.
3. Number of users

Added info: If you fail to take back up on a daily basis, if your exchange server goes down coz of "GOD KNOWS WHAT", you are gonna be in trouble.
If I am not wrong, you mentioned that your database is 3 GB, then probably you can spend less than 10 Dinars to get an external HDD and back up your exchange on a daily basis so that you dont have to Panic once you find your DB is in dirty Shutdown.

Also, you could use the eseutil /mh command to check if your database is in clean shutdown and if it does show the same, it will show you that LOGS REQUIRED =0x0 which means all the log files have been successfully committed to the databaseand you could probably delete all the log files, by which you can again save space.

Do run the ExBPA tool to diagonise issues on your exchange server.

RATISH



(in reply to generalkw)
Post #: 8
RE: How to reduce size of EDB & STM files - 13.Aug.2008 3:47:15 AM   
generalkw

 

Posts: 19
Joined: 7.Aug.2008
Status: offline
There is three SG
1. 14 GB
2. 28 GB
3. 6 GB

exchange is enterprise edition & no of users is 160
for time being we are taking backup on two tapes......
coz we have a tape of 72 GB its only taking backup of 36 GB....coz of some compressed ratio

(in reply to ratishnair)
Post #: 9
RE: How to reduce size of EDB & STM files - 13.Aug.2008 10:52:52 AM   
uemurad

 

Posts: 8232
Joined: 7.Jan.2004
From: California, USA
Status: offline
You should find a 1221 Event for each of the three mailbox stores.  That number can be used as an estimate to the amount of disk space you can expect to reclaim after running an offline defrag or by moving all the mailboxes to a new mailbox store.

Please note that offline defrags should never be considered a standard maintenance procedure.  In fact, Exchange has better performance if it has some whitespace to work with.

Also note that if you move the mailboxes to multiple stores, you could possibly affect Single Instance Storage.  As a simple example, let's say you have a store with four mailboxes and each of the four have exactly the same messages.  If each mailbox is 100MB, then you can expect the store to be around 100MB because it keeps one copy of each message.  Now say you move two mailboxes to one new store and two to another.  Each of those stores will be around 100MB.  If you further split the data and end up with four stores with one mailbox each, you'll end up with four 100MB stores.

Although my example is somewhat confusing, I offer it only as an explanation of why the numbers won't necessarily add up should you decide to reorganize the mailboxes.

_____________________________

Regards,

Dean T. Uemura
Microsoft MVP - Exchange (2007-2011)
exchangeguy.blogspot.com
uemurad@yahoo.com

(in reply to generalkw)
Post #: 10

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