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Log size for SharePoint database

Posted on 2014-02-10
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Last Modified: 2014-02-16
I find that there are several big log files on SharePoint,  can I use the normal SQL backup procedure to backup the log with truncate, and then shrink the transaction log file.

In a long run, can I change the recovery mode for these SQL database to Recovery ? Will there be any concern on this ?  

Tks

SharePoint_Config
SharePoint_AdminContent_xxxx
WSS_Content
SSISDB
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Question by:AXISHK
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Expert Comment

by:QPR
ID: 39849153
Yes, backup the logs (if not in simple mode) then backup with truncate.
The recovery mode you select depends on what data you can afford to lose in a disaster.
Full mode will give you the ability to restore from backup (DB backup) and then restore all transaction log backups taken since the DB backup.
Simple mode means you can only restore the DB backup as there are no log backups.

I would put the content databases in full and others in simple.
Have a nightly DB backup for all and an hourly log backup for the DBs in full recovery mode.

While in the area check that the autogrow value on the files are not too small. Larger values with cut down on (CPU intensive) auto growths and reduce VLFs (virtual log files) within the logs
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Author Comment

by:AXISHK
ID: 39849201
One more check,

Can I directly shrink the transaction log without doing the backup with truncate option, or just doing the backup without truncate option ? What's that option used for ?

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Expert Comment

by:QPR
ID: 39849238
Backup without truncate won't shrink, DBCC shrinkfile will, backup with truncate will
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Author Comment

by:AXISHK
ID: 39849290
Sorry,

Do u mean that I can issue DBCC shrinkfile on the transaction log and it will truncate the committed transaction and reduces the physical size of the log file ?
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Expert Comment

by:QPR
ID: 39849294
I would truncate follow by DBCC shrinkfile to be sure
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Author Comment

by:AXISHK
ID: 39849324
We can only truncate the transaction log through the backup, correct ?

The truncate and shrinkfile works on transaction log only, no need to carry out on the database, correct ?

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Expert Comment

by:QPR
ID: 39849345
Shrinkfile also works on the DB file too.
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Author Comment

by:AXISHK
ID: 39850415
HOW TO Shrink database?
Can i truncate trx. log directly or it can only be truncate through backup?
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Accepted Solution

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QPR earned 500 total points
ID: 39850997
DBCC shrinkfile
http://msdn.microsoft.com/en-us/library/ms189493.aspx

All you need to know about shrinking the DB, the log and truncating
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Author Closing Comment

by:AXISHK
ID: 39863672
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