Very Confused - Unused Space
Mar 29, 2001
Hello,
I have a table which resides on a diff.filegroup.
The space allocated is 7700MB.
Now ehen I use sp_spaceused 'table_name' to see how much space is left it's giving me data as
rows reserved data index Unused
at 1000hrs 629879 6777904 5068344 8 1709552
After an hour 637537 6780336 5070800 8 1709528
After 2hours 643883 6782560 5072904 0 1709656
After 2.5hrs 646887 6783584 5073920 0 KB 1709664 kb
after 3hrs 647239 6783712 5074056 0 KB 1709656 K
If you note rows are increasing,so is the reserved place and data but unused is also increasing.I think it should come down.
What behavior is this?How can I find out how much space is left in this table residing on diff.file group?
TIA
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Mar 1, 2006
How can I determine how much unused space to remove from database files? I am setting up a maintenance plan and I am trying figure that out.
Also, is there a rule on how far to shrink TL?
Please help. Thanks.
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Mar 12, 2004
I wrote simple script to check space used by tables:
CREATE TABLE #SpaceUsed(
TableName NVARCHAR(128),
NoOfRows INT,
Reserved NVARCHAR(18),
Data NVARCHAR(18),
Index_Size NVARCHAR(18),
Unused NVARCHAR(18)
)
GO
sp_msforeachtable "INSERT INTO #SpaceUsed EXEC sp_spaceused '?'"
SELECT * FROM #SpaceUsed
SELECT
CAST(Sum(CAST(Replace(Reserved,' KB','') AS INT)) AS NVARCHAR) + ' KB' AS TotalReserved,
CAST(Sum(CAST(Replace(Data,' KB','') AS INT)) AS NVARCHAR) + ' KB' AS TotalData,
CAST(Sum(CAST(Replace(Index_Size,' KB','') AS INT)) AS NVARCHAR) + ' KB' AS TotalIndex_Size,
CAST(Sum(CAST(Replace(Unused,' KB','') AS INT)) AS NVARCHAR) + ' KB' AS TotalUnused
FROM #SpaceUsed
DROP TABLE #SpaceUsed
and one of results looks strange to me:
TableName NoOfRows Reserved Data Index_Size Unused
-------------------------------------------------------------------------------------------------------------------------------- ----------- ------------------ ------------------ ------------------ ------------------
T_TableXX 50081 38024 KB 37432 KB 640 KB -48 KB
Anyone know reason of such result (negative value of unused space)?
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Oct 17, 2005
I was just reading a doc on SQL , that said that to free up the unused space from the DB , you should use the shrinkdatabase DBCC commnad. ....
I want to knw how to determine how much free unused space is there in a DB
Thanks,
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Jul 20, 2005
On a production database, there is a 2GB database, when I runsp_spaceused it indicates a very high quanity of unused space. Thedatabase has been shrunk & free space sent to the OS. Why is thisvalue so high, what can I do to reclaim the space?database_name database_size unallocated space------------------------------------------------------------------------------DB_00001 2004.13 MB 49.64 MBreserved data index_size unused------------------ ------------------ --------------------------------1531248 KB 412720 KB 165168 KB 953360 KB
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Feb 7, 2002
I am working with a large database that has its tables stored on a secondary filegroup. I'm trying to shrink the size of the files but I can't seem to get the system to free up the unused space. I've tried shrinkdatabase and shrinkfile both with and without the truncateonly option. Has anyone else had this problem? Is there a workaround? Any help would be greatly appreciated.
Thank you.
Cathy
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Mar 13, 2008
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Sep 22, 2005
Hey guys,
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Is the only way to BCP out all the data (except the 1 column i no longer require) drop the column and BCP the data back into the table?
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currently stuck with an issue where I need to reclaim the unused table space in SQL server.
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Similarly I have identified many Non clustered indexes on big transactional tables(~ 4 million records) that where not used since GO live 1 year back, so I wanted to drop these indexes to cut down the performance and maintenance overhead , so my question is will dropping these indexes reduces the database size?
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Dec 30, 2014
best method to my issue regarding unused space. SQL SERVER 2014 BI EDITTION..I have a table that showed 62% Data, 7% unallocated, and 29% unused space.I ran the ALTER TABLE <table name> REBUILD, which changed it to 32% data and 67% unused.What I do with this table monthly and what I believe is causing this unused space issue is this:Every 1st of the month I get a csv file that holds around 3.2 million rows/15 columns of data. About 3 gbs every time.It's 13 months of data. I remove the last 12 months from the current table and import the new 13 month data.I do this twice a month and have no choice because the data is constantly updated and why we get it twice a month.So I am deleting around 6 gbs of data a month as well as adding around 6 gbs of data a month.
I believe this is why I end up with so much unused space, but just found the REBUILD command, which worked but now a small hit on performance and have too much space in the current table. I have read several times that shrinking the file is no good, but what other way to get rid of the extra space in this table? Also, the table doesn't have any indexes or primary key because of duplicates.
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May 26, 2015
OS: Windows Server 2008 R2 Standard
SQL Server: 2008 SP1 Standard
We have a database with about 500 GB of free disk space on data file and the database is being set to read only mode for the fore-see-able future. We would like to release this unused disk space. We know that we could shrink the data file and then work on re-indexing to remove fragmentation.we wanted to check if some other method like backup and restore of the database could free up unused disk space in the data file. if someone was able to release unused disk space on data file by implementing a backup and restore.
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Feb 23, 2012
how to claim unused free space at table level. The database size is of 4.6TB, recently I deleted some data which is of almost 1.5TB but my unused space has grown upto 2.5TB leaving me short of space on my drives. How do I claim this usused on to OS Disk space?
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Nov 14, 2007
Hi,
I am trying to do this:
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What would be the syntax.
Any help appreciated.
Thanks
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Feb 23, 2007
I am generating a Report from Sql Data Source in Sql Server 2005 and viewing the Report in Report viewer control of Visual Studio 2005.
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I tried following solutions
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2) Inserting <pre> tag before the string and </pre> tag after the string (Also tried <Pre> instead of <pre>)
But in all the cases result is same. The Report Viewer control is showing €œ €? instead of space and €œ<Pre>€? tag instead of preserving spaces.
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I am using the below script to get space alerts  and now i am interested in sending alerts  if for any drive space available is Less than 10% or 15%.. how to convert beelow code to find in %Â
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DECLARE @Spaces Varchar(50)
DECLARE @availableSpace FLOAT
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[Code] ....
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Mar 2, 2005
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Method 2: I used the shrink database option in Enterprises manager to shrink it (file chosen=log , use default option)
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Jul 20, 2005
This is driving me bananas. Can't find any info on this anywhere....SQL 2000 seems to replace double space with a single space when I seta varchar field to " " (2spaces), it only stores " " (1space). Whyon earth would microsoft do this? If I save 2 spaces - I WANT TO SEE2 SPACES!!!!Can anyone help? Is this a database setting? Is this due to usingvarchar?Any help appreciated.Colin Hale
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Aug 23, 2007
Dear Experts,
I'm working for an ERP company, for our product, there are around 2000 tables. in each table, we are using 10 extra columns for our future use. all these are using nvarchar(50) datatype.
almost 95% of the columns in these are not in use almost. those are having null value and in some columns, the values are like 0,1...
is this affects the performance?
please spare your valuble time
thank you very much
Vinod
Even you learn 1%, Learn it with 100% confidence.
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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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Nov 14, 2006
How do we suppress multiple spaces to a single space in T-SQL
E.G.
Field: FullName
e.g.
WOMENS HEALTH RIVER VALLEY
JOHN FAMILY MED GROUP
HERSH STWEART P.
PARK HEIGHTS MEDICAL CENTER
KOPP WHITEFIELD E
The o/p wanted is
HERSH STWEART P.
Thank you.
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HI all,
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Log: 50MB
How can I free the unused space in the transaction log because
the database is getting too big.
Thank you for your suggestion.
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Jul 20, 2005
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Sep 7, 2007
Hi,
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Jan 4, 2007
Hi,
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The reason is that I will have to give the following script to someone to execute on his instance and I don t want it to fail.
The script creates a database mosaikDB737, create a table called FileListInput in that database and populates a second table called DBlistOutput with the list of names of all databases in the instance.
Please let me know if there are any (BAD) chances for the following script to fail.
create database mosaikDB737
go
use mosaikDB737
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[FileListInput]') AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[FileListInput](
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If you see spelling errors in the queries please ignore, that is not the full queries, it is just a cut down version to explain what I need to be able to do.
Query1
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Query2
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Hi,
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Sondra
Protected Sub submit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles submit.Click
Dim myReader As Data.SqlClient.SqlDataReader
Dim mySqlConnection As Data.SqlClient.SqlConnection
Dim mySqlCommand As Data.SqlClient.SqlCommand
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mySqlCommand = New Data.SqlClient.SqlCommand(sql, mySqlConnection)
Try
mySqlConnection.Open()
myReader = mySqlCommand.ExecuteReader()
If (myReader.HasRows) Then
'Read in the first row to initialize the DataReader; we will on read the first row.
myReader.Read()
Dim content As ContentPlaceHolder
content = Page.Master.FindControl("main")
Dim lbl As New Label()
lbl.Text = "The Last Name you choose, " & Me.dlLastName.Text & ", has a first name of " & myReader("FirstName")
content.Controls.Add(lbl)
End If
Catch ex As Exception
Console.WriteLine(ex.ToString())
Finally
If Not (myReader Is Nothing) Then
myReader.Close()
End If
If (mySqlConnection.State = Data.ConnectionState.Open) Then
mySqlConnection.Close()
End If
End Try
End Sub
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Nov 7, 2007
I have an old DATABASE that is not more in use , so I want to drop that database.
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