Shrink File Tool From EM Took All The Empty Space Allocated To Data File
Jul 20, 2005
I've production sql server 7 sp3 on windows NT. I had a 8GB data file of
which 5GB were used and 3GB were unused. I wanted to take back the unused
3GB.
So I did the following with EM GUI:
1. I tried to "truncate fre space from end of the file". Didn't truncate
the file. I believe there was no empty space at the end of the file.
2. Next I chose the option to "shrink file to 5GB". And to my horror the
data file instead of taking just 5GB took the empty spaces also and the size
of the used data file went to 8GB.
Any idea what's going on?
TIA,
SP
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Oct 4, 2007
Hi all
My Transactional log size increased to 39GB, it is in full recovery mode,
To regain the space, i have done the following
BACKUP LOG DB_NAME WITH TRUNCATE_ONLY
DBCC SHRINK_FILE (LOG_FILE_NAME,500)
But not able to regain the space in the hard disk.
No Transactional backups to truncate the log file were setup.
Can you please tell me why the space was released and what should i do further to clean up the sapce
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Mar 9, 2007
This script can be used to shrink a database file in small increments until it reaches a target free space size.
It will loop to execute the DBCC SHRINKFILE command to shrink the database file by the desired increment until it reaches the target free space.
It is often better to shrink database files in small increments so that it can make continuous, incremental progress, instead of trying to shrink by a large amount in one command. This makes it easier to shrink a database that must be shrunk by a large amount, and makes it easier to interrupt without losing all progress.
-- Shrink_DB_File.sql
/*
This script is used to shrink a database file in
increments until it reaches a target free space limit.
Run this script in the database with the file to be shrunk.
1. Set @DBFileName to the name of database file to shrink.
2. Set @TargetFreeMB to the desired file free space in MB after shrink.
3. Set @ShrinkIncrementMB to the increment to shrink file by in MB
4. Run the script
*/
declare @DBFileName sysname
declare @TargetFreeMB int
declare @ShrinkIncrementMB int
-- Set Name of Database file to shrink
set @DBFileName = 'MyDatabaseFileName'
-- Set Desired file free space in MB after shrink
set @TargetFreeMB = 1000
-- Set Increment to shrink file by in MB
set @ShrinkIncrementMB = 50
-- Show Size, Space Used, Unused Space, and Name of all database files
select
[FileSizeMB]=
convert(numeric(10,2),round(a.size/128.,2)),
[UsedSpaceMB]=
convert(numeric(10,2),round(fileproperty( a.name,'SpaceUsed')/128.,2)) ,
[UnusedSpaceMB]=
convert(numeric(10,2),round((a.size-fileproperty( a.name,'SpaceUsed'))/128.,2)) ,
[DBFileName]= a.name
from
sysfiles a
declare @sql varchar(8000)
declare @SizeMB int
declare @UsedMB int
-- Get current file size in MB
select @SizeMB = size/128. from sysfiles where name = @DBFileName
-- Get current space used in MB
select @UsedMB = fileproperty( @DBFileName,'SpaceUsed')/128.
select [StartFileSize] = @SizeMB, [StartUsedSpace] = @UsedMB, [DBFileName] = @DBFileName
-- Loop until file at desired size
while @SizeMB > @UsedMB+@TargetFreeMB+@ShrinkIncrementMB
begin
set @sql =
'dbcc shrinkfile ( '+@DBFileName+', '+
convert(varchar(20),@SizeMB-@ShrinkIncrementMB)+' ) '
print 'Start ' + @sql
print 'at '+convert(varchar(30),getdate(),121)
exec ( @sql )
print 'Done ' + @sql
print 'at '+convert(varchar(30),getdate(),121)
-- Get current file size in MB
select @SizeMB = size/128. from sysfiles where name = @DBFileName
-- Get current space used in MB
select @UsedMB = fileproperty( @DBFileName,'SpaceUsed')/128.
select [FileSize] = @SizeMB, [UsedSpace] = @UsedMB, [DBFileName] = @DBFileName
end
select [EndFileSize] = @SizeMB, [EndUsedSpace] = @UsedMB, [DBFileName] = @DBFileName
-- Show Size, Space Used, Unused Space, and Name of all database files
select
[FileSizeMB]=
convert(numeric(10,2),round(a.size/128.,2)),
[UsedSpaceMB]=
convert(numeric(10,2),round(fileproperty( a.name,'SpaceUsed')/128.,2)) ,
[UnusedSpaceMB]=
convert(numeric(10,2),round((a.size-fileproperty( a.name,'SpaceUsed'))/128.,2)) ,
[DBFileName]= a.name
from
sysfiles a
CODO ERGO SUM
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Sep 20, 2007
Hello, I attempt to export a CSV formatted file from SSRS and if the field is not containing data, a space is added to the field.
output:
4, ,1, , , ,
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Apr 29, 2014
Why shrinkfile empty file does not redistribute data evenly in the primary file group with multiple files:
Please run the script attached to see what the end result is.
This is what I set up last night on my test machine.
1) Create database [FGTest] size 200MB
2) Create table called TEST on primary
3) Insert 40MB of data into test
4) Create another file group called temp in primary size 200MB
5) Shrinkfile('FGTest',emptyfile) so that all data is transfered from FGTest into temp file group.
6) Add another 2 files called DATA2 and DATA3. Both are 200MB.
7) We now have 3 empty files that I want data distributed evenly on. FGTest, DATA2 & DATA3
8) Shrinkfile('temp',emptyfile) to move all the data from temp over the 3 file groups evenly
I would expect at this stage to have the following:
FGTest = 13MB,
DATA2 = 13MB,
DATA3 = 13MB
(40MB of data over 3 files should be about 13 MBish in each file)
What I actually end up with is this:
FGTest = 20MB
DATA1 = 10MB
DATA2 = 10MB
It looks as though SQL Server is allocating 50% of all data to the original file and then 50% evenly over
the remaining files in PRIMARY.
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Mar 16, 2015
one of my database data file is 100 GB and the log file is 500 GB.DB is in full recovery model and the transaction logs happen once in 6 hours.Even then, the Database log file isn't reducing in size.
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May 2, 2005
We have a database that doesn't seem to be growing on its own correctly (or seems like it isn't). This database has been running really slow for the last week and we think this may be whu
Current size is listed at 963mb while allocated size is 959mb. Trans log size is set to auto-grow and is allocated 4mb
Can we change that number on the fly, and also change the the growth settings without affecting the system?
Being a live system we obviously do not want any downtime, but believe this will help with our slowdown.
Any other ideas would also be appreciated
Thanks!
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Jan 7, 2008
First off, I'm normally not one to shrink the hell out of data files (for obvious reasons), but this is a special case. We are setting up a mini test environment in preparation for migrating one of our systems to SQL Server 2005 (among other things).
The problem I have is that the test SQL Server I have to use has only about 50GB of disk space that I can allocate to databases, when the databases that I need to fit in there sit at around 130GB total. I've got 13 total databases that I have to fit in there. There are several logging tables in each, and lots of binary data that's really not needed for our testing. The first thing I did on my testing copies was to change the recovery model to simple, which chopped the log file.
So I've been truncating the logging tables and have been stripping out the unneeded data. I then have been running a script that I wrote to reindex, then shrink the individual files, then the database as a whole. Probably overkill, but it has worked on all of the DBs with the exception of one.
This particular DB is approx 21GB in total size (it's already come down from about 55GB), but when you look at the free space, it's showing 75% free inside the mdf file. I don't really care much about performance at this point, I just need to get the file size down and can't figure out how.
Any ideas?
BTW - this is the script that I wrote:
declare @tablename varchar(255)
declare @logfilename nvarchar(200)
declare @datafilename nvarchar(200)
declare @dbname nvarchar(200)
declare @sql nvarchar(1000)
set @dbname = ltrim(rtrim(db_name()))
set @logfilename = ltrim(rtrim((select name from sysfiles where lower(filename) like '%.ldf%')))
set @datafilename = ltrim(rtrim((select name from sysfiles where lower(filename) like '%.mdf%')))
/* Reindex Tables */
declare tablecursor cursor for
select '[' + table_schema + '].[' + table_name + ']' from information_schema.tables
where table_type = 'base table'
open tablecursor
fetch next from tablecursor into @tablename
while @@fetch_status = 0
begin
print 'Reindexing ' + @tablename
dbcc dbreindex(@tablename,' ',90)
fetch next from tablecursor into @tablename
end
close tablecursor
deallocate tablecursor
/*Shrink the crap out of the DB*/
set @sql = 'BACKUP LOG [' + @dbname + '] WITH TRUNCATE_ONLY'
print @sql
exec sp_executesql @sql
set @sql = 'DBCC SHRINKFILE([' + @logfilename + '], 1)'
print @sql
exec sp_executesql @sql
set @sql = 'DBCC SHRINKFILE([' + @datafilename + '], 1)'
print @sql
exec sp_executesql @sql
set @sql = 'DBCC SHRINKDATABASE([' + @dbname + '], 1)'
print @sql
exec sp_executesql @sql
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Sep 26, 2015
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I've already deleted much of the historyThe MSDB database is in "Simple" recovery modeI've done a full backup (in case the log was "waiting" for a backup)
I hesitate to do things (such as as Detach / Attach) with MSDB that I might do with a user database.
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Mar 2, 2005
Hi.. I was doing a good maintenance on my DB and my trans log LDF keep growing until 30GB but my DB data file MDF is only 2GB. I found the two following method to reduce my log size.
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After doing that, I found my LDF log file is still about the same size=27GB but when I see clearly, from the shrink database windows, the log spaced used reduced to only 100MB, the allocation log space is still 27GB. Why? How to make the LDF smaller to be the around the same size as the space used 100MB?
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Dec 5, 2001
Hello,
Somebody know how to reduce the space allocated for the transaction log space for my SQL_DB ?
3700 MB allocated but only 100 MB used and 3600 MB are free !
Transaction log properties :
Automatically grow file are filled
file growth by percent = 5%
maximum file size - restrict filegrowth = 3700 MB (we can't reduce it !)
Thank you for your precious help !
Khaix from Brussel.
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Oct 30, 2015
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XX 1 I:DataMSSQL.1MSSQLDataNew XX.mdf PRIMARY 68140032 KB Unlimited 0 KB data only
XX_log 2 I:DataMSSQL.1MSSQLDataNew XX_log.LDF NULL 1050112 KB 2147483648 KB 102400 KB log only
XX_2 3 I:DataMSSQL.1MSSQLDataNew XX_2.ndf PRIMARY 15458304 KB Unlimited 0 KB data only
XX_3 4 I:DataMSSQL.1MSSQLDataNew XX_3.ndf PRIMARY 13186048 KB Unlimited 0 KB data only
XX_4 5 I:DataMSSQL.1MSSQLDataNew XX_4.ndf PRIMARY 19570688 KB Unlimited 204800 KB data only
XX_5 6 I:DataMSSQL.1MSSQLDataNew XX_5.ndf PRIMARY 19591168 KB Unlimited 204800 KB data only
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Mar 26, 2001
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Oct 20, 1999
On a database with a log file that has an unrestricted file growth, the file size exceeds 1 GB. Since this excessive was caused by a badly written update statement, I want to reduce the size to about 200MB.
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Aug 27, 1999
Hi,
I have created a new database in SQL Server 7 with the auto grow options set to on. I then added a whole load of new data to the table which made the transaction log file grow to 20Mb.
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Yours well and truly stuck,
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Oct 25, 2004
I have Disk Xtender 2000 which was made by OTG Software , Legato and now EMC. I have an NT 4.0 PC with Microsoft SQL 2000. I have a drive space problem and need to shrink a 38 gig .ldf file called OTG03.ldf I also have a 2 gig .mdf file called OTG03.mdf How can I shrink this .ldf file. I'm not a DBA so being specific is greatly appreciated.
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Dec 13, 2012
My DB's recover model is SIMPLE. Is it OK to schedule a SHRINK FILE only on the log files regularly? Any GOOD vs BAD about my plan? I want to do this because the log files keeps on increasing. Right now, the log file s on ENABLE AUTOGROWTH, FILE GROWTH = 10%, RESTICTED FILE GROWTH = 2,097,152.
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Apr 7, 2008
I am geting growth alerts and need to shrink a log file that is 99% full, but it won't let me. Here is the message I get.
The transaction log for database 'SOM_System' is full. To find out why space in the log cannot be reused, see the log_reuse_wait_desc column in sys.databases
What can I do in order to shrink this log file??
Thanks
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