Shrinking Log File

Aug 29, 2007


I have a problem with shrinking a log file on SQL 2000. The log file has grown to 25gb (the db is 30gb) . The DB was in simple recover mode but I have changed it to full so that the log file can be backed up. I have run the dbcc shrinkfile on the log file several times (plus log file backups) and it has increased the logfile size. Each time I have run shrinkfile I get €˜Cannot shrink log file 2 (db_Log) because all logical log files are in use€™ message. I have used the dbcc loginfo command and this shows that all the virtual log files are in use. The db also publishes 4 snapshot replications. Any suggestion for how I can easily shrink the log file?


thanks

Simon

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Apr 25, 2002

I have a 13 Gig Log File with only 121 Mgs of space used. I have run the DBCCSHRINKFILE command and it has shrunk it by about 100 Mgs. Why can't I get it to shrink to a reasonable size.

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Sep 18, 2001

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Nov 29, 2000

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.

DECLARE @DB VARCHAR(40)

SELECT @DB = 'PBDSSTEST'

CHECKPOINT

EXEC('DBCC SHRINKFILE ('+@DB+'_log, 1, NOTRUNCATE)')

EXEC('DBCC SHRINKFILE ('+@DB+'_log, 1, TRUNCATEONLY)')

CREATE TABLE t2 (char1 char(4000))

DECLARE @i int SELECT @i = 0 WHILE (@i < 300) begin INSERT t2 values ('a') SELECT @i = @i +1 END DROP TABLE t2

BACKUP LOG PBDSSTEST TO PBDSSTESTLOGBACKUP

Before I ran this the used portion of the log was 1795.12 MB, the free was 1570.50 MB for a total of 3365.62 MB.

After completing this the used portion was 25.62 MB, the free space was 3263.50 for a total of 3289.12 MB. It only srhunk about 26 MB. Why won't it shrink it anymore. There was plenty of data in the used at the time of the shrinkfile command so I would have thought it would have shrunk it a lot more.
Please help. I don't understand why it won't shrink it anymore than it did.

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what should I do to successfully shrink the log file.
Thanks.

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In the maintenance schedule that runs every night

1 Do a full backup to disk
2. Do a transaction log backup to disk
3. run the following TSQL

USE [MyDB];
GO
ALTER DATABASE MyDB
SET RECOVERY SIMPLE;
GO
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GO
ALTER DATABASE MyDB
SET RECOVERY FULL;
GO

4. Backup disk files to tape.

however it doesn't work !! the TLOG file does not shrink, even though its the same as the manual job that I run?

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

any ideas ?

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Tnx

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then

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code:
====
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