Reduce the size of Transaction Log FIle

Question

Reduce the size of Transaction Log FIle

Mathew M.Varghese

SSCommitted

Points: 1929
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January 4, 2006 at 9:55 pm

#188829

Hi All,

SQL Server Version : SQL Server 2000 8.0.194

My one production database Transaction Log size is more than 10GB. But data file size is only 1 GB.

I try to reduce the side of the logfile using shrink data file, again the size is not reducing.
How can I reduce the size of a log file .

Please advice

Mathew

Viewing 7 posts - 1 through 6 (of 6 total)

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Ian Yates SSCoach Points: 19738 More actions · Answer 1

Are you using simple or full recovery? If using full, backup the transaction log, or switch to simple recovery mode which will truncate the log at various intervals.

webtekkie SSCommitted Points: 1901 More actions · Answer 2

Hi Matthew,

Here is the command you need to run to carry out Ian's suggestion.

backup log <DB Name Here> with truncate_only

After this, you need to consider the backup solution you require for this db, then set the database recovery mode as Ian suggests.

Best regards,

Martin

Mathew M.Varghese SSCommitted Points: 1929 More actions · Answer 3

I did the following

1. Change the recovery model to simple

2. issue the commnad backup log <DB Name Here> with truncate_only. But this time file size not changed. FIle size is still 10 gb . But uses only 25 MB

3. When i try to reduce the log size using enterprise manager, sql showing message "error 21335, New DB File size must be larger than current size'

Pls explain me how can i reduce the physicial Transaction file size

Mathew

webtekkie SSCommitted Points: 1901 More actions · Answer 4

Matthew,

What you have effectively by running the backup log command is emptied the water out of a bucket. The contents of the bucket are gone, but the bucket still remains, if you catch my drift.

To shrink the file, you must now run the following...

dbcc shrinkfile (<virtual file name here> )

and it will then shrink back to it's original size. To find the virtual file name, run sp_helpfile from within the context of the target database.

Hope that helps,

Martin

J Wright SSC Veteran Points: 211 More actions · Answer 5

I've found this script to work best for us.

http://www.sqlservercentral.com/scripts/viewscript.asp?scriptid=26

Good Luck!

vambati SSCrazy Points: 2769 More actions · Answer 6

As said in BOL:

USE UserDBGODBCC SHRINKFILE (DataFil1, 7)GO

"Datafill" is the logical file name and u need to difine a size the file needs to be shrinked to. Try with 9000 (GB) to start with. Once the file has been reduced to 9 GB go for another GB less. Seems to be in SQL 2000 if u have less phisical disk space - basically less then the log file DBCC SHRINKFILE takes forever to shrink the log. By reducing it by chunks its more faster and efficient. I had the same issue 2 days ago and this solution took care of it. post a note if this works.

Good Luck.