SQL 2012 :: Reclaim The Unused Table Space?
Sep 15, 2014
currently stuck with an issue where I need to reclaim the unused table space in SQL server.
ISSUE: Due to database size issue we have moved all the images from database to filesystem and want to reclaim the unused space now....I have tried shrinking the database and rebuild the indexes but didn't see any difference in the table or database size.
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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Feb 25, 2015
I have a SQL Server 2012 DB in Full recovery mode that has never had a TLOG backup. the log is huge 200+GB.
I tried doing a transaction log backup but there is not enough space on the Disk.
How can I reclaim this log space in SQL Server 2012?
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Feb 11, 2015
I have a table 300+GB. it holds 10 years of Data. I need to delete 5 years of data and put it to another server so I can have more space.
If I delete 5 years of data, Transaction log gets so huge and size of the database even gets bigger because of the .ldf file which even gets bigger! I think I can shrink the log file and the data file. Is this the best way to do it?
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Mar 13, 2008
I'm trying to figure out how to reclaim unused space in a huge table (tbl) after setting one of the text columns to be the empty string. Other tables have foreign key columns associated with tbl.
After doing something like this,
update tbl set col = ''
the table doesn't automatically reclaim that space. If I do a direct insert into a new table like this,
insert into tbl2 (cola, colb, colc) select * from tbl
the new table is smaller as expected (about half the size in my case). Any ideas?
Rob
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Sep 22, 2005
Hey guys,
I have a table which has 6 text columns (tblA).. I no longer require 1 of those text columns and want to reclaim the space that it is currently taking up..
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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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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Mar 19, 2015
Is it possible to reclaim space after rebuilding indexes(shrinking is not an option).
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Aug 2, 2006
Hello,I tried to make what one reply advice to recover the disk space afterDROPed columns but it doesn't work. I did DBCC DBREINDEX to the tablebut nothing changes.Any other solution?Ignacio
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Jul 23, 2005
Hi,This is probably an easy question for someone so any help would beappreciated.I have changed the columns in a table that where nvarchar to the samesize of type varchar so halve the space needed for them.I have done this a) becuase this is never going to be an internationalapplication, b) we are running out of space and c) there are 100million rows.I have done this with the alter table statement which seems to work butthe space used in the database hasn't altered.I'm presuming that the way the records are structured within the tablethere is just now more space free inbetween each page???Is there a way or re-shrinking just an individual table and free upsome of the space in there or am i missing the point somewhere?Thanks in advance,Ian
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Jan 15, 2015
How to find if there is a query that can be written on DMV's which will be able to retrieve the indexes that are not being used in a table.
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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 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 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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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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Mar 3, 2014
How do you find stale stored procedures ?
In a scenario where a developer created a slight modification of a stored procedure because he was afraid of breaking something else and took the easy way out, and a few more later down the line, multiple versions of a stored proc. doing slightly different things are just laying around.
"Last used" would be useful piece of information to determine the most recent date a stored procedure was called, either by the application itself or by another stored procedure itself called by the application.
Any stored proc not used for more than say 6 months would then be identified as a candidate for clean-up.
So - short or creating - after the fact - a trigger to update the usage date upon each call - which means a lot of work and no result for the next six months, how can one go about this ?
And could this be done in SS2K8 ?
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Jul 20, 2005
I have a large table that I recently purged a year of data from.However, the table size in sp_spaceused hasn't decreased as much as Iwould expect. (there are no text or large object columns on thistable, BTW) Running sp_spaceused on the table shows the following.rows reserved data index size unusedTABLE_NAME23470880 67790808 KB 18116312 KB 3211616 KB 46462880 KBI ran a dbcc indexdefrag on all indexes on the table last night,including the clustered index, and I'm still seeing pretty much thesame amount of space reported as unused.The one thing that I haven't done yet is to run the sp_spaceused onthis table with the @updateusage flag set to true as I need to do thisafterhours to reduce contention. I will attempt this tonight andreport on the results.Here's DBCC SHOWCONTIG OUTPUT for the table:DBCC SHOWCONTIG scanning 'TABLE_NAME' table...Table: 'TABLE_NAME' (917578307); index ID: 1, database ID: 7TABLE level scan performed.- Pages Scanned................................: 2264447- Extents Scanned..............................: 285484- Extent Switches..............................: 287092- Avg. Pages per Extent........................: 7.9- Scan Density [Best Count:Actual Count].......: 98.59%[283056:287093]- Logical Scan Fragmentation ..................: 0.04%- Extent Scan Fragmentation ...................: 3.19%- Avg. Bytes Free per Page.....................: 2418.9- Avg. Page Density (full).....................: 70.12%DBCC execution completed. If DBCC printed error messages, contact yoursystem administrator.Looking through the history of the group, the one thing that seems toremedy this problem consistantly is to bcp out all the data, trunc thetable and bcp all the data back in. This is not really a possibilityfor me due to the size of the table and the availability expectationsof my customers. Is there anything that I forgot to check? Do youthink that it's just a matter of incorrect statistics in sp_spaceused?Thanks in advance:Matt
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Jul 20, 2005
Hi,I guess SQL server does not release claimed memory even if it is notused. Is there anyway to free the unused memory?Thanks,John Jayaseelan*** Sent via Developersdex http://www.developersdex.com ***Don't just participate in USENET...get rewarded for it!
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Sep 8, 2015
How to find available database space?
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Jul 11, 2014
Having just archived quite a bit of data from the main Production DB, I now have around 15% free, reclaimable space sat in the data file.
I'm reluctant to run DBCC SHRINKFILE as that apparently causes a lot of Index fragmentation which will cause issues for performance - how else can the space be allocated back to the OS?
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Sep 11, 2014
One of our DB is in recovery state due to insufficient space in drive where the log files resides. Is there anyway we can come out of this situation?
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Jun 11, 2014
I am trying to count the characters in a sting before a space. Here is the example of what I am trying to accomplish.
"2073 9187463 2700' 4 7 4, the string character count is 4 before the space, 7 is the count before the next space and the last is the last in the string, if there was more characters within this string for example....'2073 9187463 2700 7023 6044567' it would return the number of characters in the string before the space and at the very end of it.
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Aug 13, 2014
I have a tempdb split into 4 files (5 if you include the log).
Autogrowth is disabled on the mdf/ndf files so that they can be used round robin (1 file per logical CPU).
Is there a way to be alerted when there is x% of free space left?
I know hwo to check the free space via t-sql but want to be able to be alerted. I could run a sql job that reports the free space and send a database mail message if under x% but wondered if there was a built in (or better) method?
I also have SQL Sentry.
SQL 2012 Standard
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Aug 13, 2014
Recently maintenance was done removing some tables from the original filegroup in one drive of our SQL Server 2012 Standard Edition 64bits to another created on a separate physical drive. I was expecting the full amount of data moved to the secondary filegroup to show up as unused on the primary filegroup but that doesn't seem to be the case. Do I have to do anything after the move to release that space, not to disk, but to the database as unused?
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Jun 4, 2015
We are using the cache transformation in our project , while doing the cache transformation our disk space goes to 0 MB free and SSIS package execution not completes even after 3 hr..Initially we have around 34 GB free space on C: drive .Our server configuration is 64 RAM. We are caching the data from table which contains around 21 million records.We changed the path in properties (“BLOPTempStoragePath”,”BufferTempStoragePath”) of Data Flow task of SSIS in which we are using Cache Transformation.
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Jul 20, 2005
I have a database that has grown larger than I had expected. I thinkthere is one table that is at the root of the problem. The table isdefined as follows:CREATE TABLE [dbo].[UserAudit] ([UserAudit_id] [int] IDENTITY (1, 1) NOT NULL ,[UserAuditAction_id] [int] NOT NULL ,[Dataset_id] [int] NOT NULL ,[UserName] [char] (64) NOT NULL ,[TableName] [char] (64) NOT NULL ,[Detail] [varchar] (4000) NOT NULL ,[DateRecorded] [smalldatetime] NOT NULL ,[Dsc] [char] (256) NULL)There are 14919 records in this table. When I do the calculations iapproximate that space used by this table should be in the region of10mb (4+4+4+64+64+290(average length of Detail column)+4+256) * 14919.When I execute "sp_spaceused 'UserAudit'" i see that 119MB are beingused by this table.name rows reserved data index_size unusedUserAudit 14919 119808 KB 119352 KB 400 KB 56 KBEven if I use 4000 for the Detail column in my calculations I stillcome up with about only 64mb.Any ideas on whats going on here?Thanks in advance.
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Nov 16, 2007
I currently have 8,000 rows in the orders table and it is estimated that it will have in average 50 orders daily. The orders need to be kept for 6 months, before it is archived and deleted from the database. I calculated the amount of space that needs to be reserved for the table but unsure if I am on the right track in calculating the table size.
would there be anything wrong in my calcultation that i missed?
int
datetime
tinyint
nvarchar(15)
int
int
int
int
money
money
money
money
datetime
4
4
2
15
4
4
4
4
4
4
4
4
4
4
= 65 bytes
+ rowoverhead = 7
total = 72
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Jul 23, 2005
I have a table name in SQL Server 2000 that has a space in itex: aim internationalI had trouble just in the query analyzer with this..I had to place thename in brackets [] for it to work. But now I'm in Visual Studio .Net2003 and it gives me another problem. I get the table name from a dropdown list selection and send it to a query string. But is gives me thiserror:***************Line 1: Incorrect syntax near 'AIM international'.Exception Details: System.Data.SqlClient.SqlException: Line 1:Incorrect syntax near 'AIM international'.******************Here is the string:****************Dim sqlStr As String = "SELECT DISTINCT Last_Name FROM '" & PubName &"' WHERE PostalCode ='" & postalcode & "' And Title='" & title & "'ORDER BY Last_Name "**********************And the variable PubName is the string AIM international .I tried placing it in brackets like in the query analyzer :****************Dim sqlStr As String = "SELECT DISTINCT Last_Name FROM ['" & PubName &"'] WHERE PostalCode ='" & postalcode & "' And Title='" & title & "'ORDER BY Last_Name "*******************and I get this:*******************Invalid object name ''AIIM international''.Exception Details: System.Data.SqlClient.SqlException: Invalid objectname ''AIIM international''.*******************Any idea what I have to do for it to work ??? Can I use table nameswith spaces or it's just not a good idea???Thanks for the help guys!!JMT
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Jul 8, 2002
I'm trying to determine how much space some tables use (SQL2000), and I found 2 suggestions posted earlier, but can't get them to work for me.
The first was
"Right click on the DB in Enterprise Manager, select view then taskpad."
When I try that, I get some of the tables displayed with the info I want, but I can't see them all and can't scroll down beyond the first 22 tables in the database.
The second suggestion:
exec sp_msforeachtable @command1="print '?'",@command2="sp_spaceused '?'"
It says "command copleted successfully, but where does the output to this go ?? Is there something other than "print" I should use ?
The grid pane is empty.
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Jul 1, 2004
Hey all, first time poster here.
Cheers!
Enterprise Edition SQL2k sp3a on Win2k3 Enterprise Edition server.
Using BCP to load ~4 million records.
Largest record width is ~350 bytes.
When finished i have over 6 million pages reserved and only about 800 thousand actually used.
Which puts me 'round about 3 rows per page and WAY too much empty space.
YIKES!
Any thoughts as to why this is happening?
Or insight into how BCP handles page allocations that may be different than the typical extent based page allocations for table data?
Thanks!
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