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How to reduce SQL Server 2008 transaction log file

Posted on 2015-02-18
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Last Modified: 2015-02-23
Can someone please advise?

I have a small database running on SQL Server 2008 Std in a desktop. 4-5 users use the database everyday during the week. Now, the hard drive space is reducing rapidly on the desktop. After looking at C Drive, I found the Log file has become too large ( close to 200GB). Now, I do a full backup of the database every night to an external hard drive attached to the desktop computer. I need to get the space back on that computer. Can someone please advise what would be the best way to do that?

- if I can reduce the LOG file with/without taking down the database?
- since I have full backup, can I just start refresh the Log file?

Thanks in advance.
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Question by:Byas_Saha
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5 Comments
 
LVL 22

Accepted Solution

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Steve Wales earned 350 total points
ID: 40618188
Have a read of this article: http://www.experts-exchange.com/Database/MS-SQL-Server/A_11077-How-to-shrink-a-bloated-log-file.html

Your log file will grow until you take a log backup.

Alternatively:

Swap to Simple Recovery Mode
Shrink Log file
Switch back to Full Recovery Mode
Take immediate full backup
Start taking regular log backups

If you're not backing up the transaction log, then it will just keep on growing ....
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LVL 15

Expert Comment

by:Vikas Garg
ID: 40618267
Hello,

1) Convert the Recovery Model to Simple Recovery

2) Start Taking Transaction Log Backup


    Create Sample Database in FULL RECOVERY Model
    Take Full Backup (full backup is must for taking subsequent backup)
    Repeat Following Operation
        Take Log Backup
        Insert Some rows
        Check the size of Log File
    Clean Up
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LVL 49

Expert Comment

by:Vitor Montalvão
ID: 40618535
I do a full backup of the database every night to an external hard drive attached to the desktop computer
Full backup do not clean the transaction log file. You need to add to your backup plan a job that runs periodically (every hour or two) so it can truncate the transaction log.
Take in consideration that having a database in Simple Recovery model doesn't allows you to restore to a point in time. You can only do that with Full Recovery model.

NOTE: After the first transaction log backup you can shrink the file.
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LVL 21

Assisted Solution

by:Alpesh Patel
Alpesh Patel earned 150 total points
ID: 40620498
For shortest solution.

Detach your database.
Delete/rename log file
attach database (Remove missing Log file)
Attach process will create new log file for you.
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Author Closing Comment

by:Byas_Saha
ID: 40627339
Thanks to everyone who replied. I used Steve Wales's solution to solve my issue. Thanks again.
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