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Srink Log File in SQL 2005

Posted on 2015-01-08
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Last Modified: 2015-01-14
One of our log file grew to 200 gigs due to a failed backup, I backed up this file and reduced the file size using the task menu in SQL Server Manager using the options in the attached image,  the action successfully completed, but when I check the size, the log file has not been reduced in size
SQL2005SrinkFile.jpg
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Expert Comment

by:Vitor Montalvão
ID: 40537890
Did you perform a transaction log backup or a full backup?
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Expert Comment

by:Lee Savidge
ID: 40537936
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by:Stephen Weber - MCSE, CCNA
ID: 40538017
I performed a log backup and then full backup the night before, and a log backup after shrinking the file, but have not done a full backup since attempting the shrink.
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Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

 
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by:Vitor Montalvão
ID: 40538085
The log backup should be BEFORE the shrink.
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Expert Comment

by:Lee Savidge
ID: 40538092
Back up database
Backup log
Shrink log if you need to
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Scott Pletcher earned 500 total points
ID: 40538267
Database backups and log backups are independent of each other.  Thus, a missed database backup should not directly affect the log backup size, assuming log backups are running normally.

You need to see if anything is preventing SQL from marking existing log space for reuse, aka "truncating the log":

SELECT name, log_reuse_wait_desc
FROM sys.databases
WHERE name = '<your_db_name>'

If the wait_desc is not "NOTHING", then we need to resolve that first.  If SQL can't "truncate" the log, you won't be able to shrink it.

Btw, I'd strongly urge you to use the command:
DBCC SHRINKFILE
to shrink files rather than the GUI.  The GUI is still on occasion flaky, and that is not an area where you want any flakiness at all.
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