Shrinking Unreasonably Large Transaction Log File.

Oct 12, 2002

Gurus,

I have inherited a SQL 2000 database ( (I am new to SQL DBA) and I found this when I was checking the db properites . The transaction log has grown bigger than the actual data file, I thought transaction log backups would truncate the inactive portion of the log file and shrink the transaction log, but it was not the case it seems, may be it was truncating the inactive portion of the log, but not shrinking it. This site does not have a job for truncating the data/log files periodically. What is the best method to deal this situation, how can I shrink the Transaction log quickly?,

All your suggestions are welcome.

TIA,
-Jay

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SQL Server 2008 :: Making Use Of A Large Transaction File To Delete Records?

Jun 5, 2015

Currently we has a database of size about 300G. Because our backup system failed some time past we were left with a transaction log file which grew to about 160G. However our backups are working again and everything is working fine. My understanding is that now the transaction log file is practically empty but the capacity remains at 160G.

When you delete records the deleted transactions are going to get logged to the transaction file. My understanding is when a backup is done these transactions get discarded out of the transaction file.

could I make use of this relatively large transaction file and start deleting transactions without out actually adding to the transaction file size.

The plan is to delete records from logging tables that are not referenced to by any other table without this increasing the transaction log file.For example over a period of a few weeks we can delete a chunk of records from a table. Then after it has completed a backup we can delete another chunk of records out of this table until we have got the table down to the records that we now need.Will this work?

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Feb 1, 2005

I have a webhost where it seems my control of my database is fairly restricted. I cannot backup the database because I don't have the necessary permissions. I cannot perform a DBCC SHRINKFILE (permissions) - and many other DBCC commands. I ran into a problem where my log file filled up during the middle of the day and impacted my operations - data was lost.

I found some TSQL for shrinking the log file, but the statement:
SET @TruncLog = 'BACKUP LOG [' + db_name() + '] WITH TRUNCATE_ONLY'; EXEC (@TruncLog)

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Is there anything else I can do, or am I to far up the creek (w/o my paddle)??

Thanx
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May 3, 2001

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------ ------ ----------- ----------- ----------- --------------
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(1 row(s) affected)

DBCC execution completed. If DBCC printed error messages, contact your system administrator.

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Aug 28, 2001

I'm having a problem shrinking my transaction log. I have a 1GB database with a 500MB transaction log. The transaction logs are backed up every 10 minutes but it has grown to 2.2GB. I've tried backing the transaction log with TRUNCATE_ONLY and then tried doing a DBCC SHRINKFILE but it doesn't seem to work. I've checked if there were any old, long running queries but there is none. What else can I do to reduce the transaction log size?

I've had a thought to create a secondary log file and then delete the primary but that isn't allowed. Is there anyway I can make the secondary log file the primary and vice-versa? This way I should be able to delete the secondary log file to reclaim space.

Any assistance is appreciated...

Many thanks,
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Jun 12, 2008

Gurus
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Hi All,My SQL server transaction log is getting bigger every day and my HDD ifrunning out of space.So i follow the MS KB about how to Shrinking the Transaction Log.After doing so the log is much much smaller as i can see the size of itunder enterprise manager.The problem is that the HDD still shows the same size.If i shrink the DB why the and reduce its size why the HDD does notshows it?Is there a way to clear the size from the HDD?Thanks All

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Jul 23, 2005

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Oct 2, 2006

Hello all,

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I'm trying to shrink the log file. I have used the suggestions that I have seen posted previously. This is the script I've been using.

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Dec 13, 2007



I have a relatively high usage 2005 database whose transaction log grows every day.

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GO
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There is nothing in the SQL logs .. but in the event log I get

Event Type: Error
Event Source: SQLISPackage
Event Category: None
Event ID: 12291
Date: 13/12/2007
Time: 00:50:10
User: NT AUTHORITYSYSTEM
Computer: ALGSQL1
Description:
Package "MyDB_FULL_BACKUP" failed.
For more information, see Help and Support Center

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