Log File Alert And Negative Free Space!?
Sep 24, 2007
We've got an alert setup on our production database to warn us when the log file(s) exceeds 7 gigs. The Alert is triggering:
"The SQL Server performance counter 'Log File(s) Size (KB)' (instance 'Lexus') of object 'SQLServer:Databases' is now above the threshold of 7000000.00 (the current value is 7057656.00)."
However, according to the file system, the database properties screen files, and properties tabs, the log files combined are at under 5 gigs so this alert should not be going off.
The scary part is, when going to right-click on the database, choosing "tasks" and going to "Shrink > Files", the "Free Space" shows negative numbers for the first log file:
Log 1
Currently Allocated space: 118.69 MB
Available Free Space: -5323.24 MB (-4485%)
Log 2
Currently Allocated space: 4853.13 MB
Available Free Space: 411.20 MB (7%)
Has anybody ever run into this? Should I be worried that there is a bigger issue at hand?
Thanks!
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Apr 19, 2007
How to check the free space in a DB file using TSQL?
------------------------
I think, therefore I am - Rene Descartes
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May 23, 2000
Hi,
In sql 7.0 , i would like to create a database with the size of 10Gb, in my server couple of databases already exist.
How do i know how much free space is there in File group.
we are having only one file group i.e PRIMARY.
Could anyone pls tell me about this.
Thank u.
--kavira
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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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Jun 25, 2006
Any idea of a function or procudure the returns the free space of a data file so I can see when I need to reclaim free space.
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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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Oct 30, 2015
Today we received an issue on an application database on internal free space on the DB is 0% that was designed with as below
name fileid filename filegroup size maxsize growth usage
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
2 of the secondary data files had its autogrowth enabled to unrestricted with 200MB and 3 of the data files including primary had its Autogowth turned OFF. Application use is complaining that there is no internal freespace on the DB.
What fails to understand us is that when the Auto growth was already TURNED OFF on 3 data files ( 1 primary and 2 secondary ) still why was the application trying to increase the space on the .mdf and .ndf files; as well when the Autogrowth is TURNED ON on 2 of the secondary data files, why was the DB not able to expand these file groups when the autogrowth is already turned off on 3 of its other files.
What more data i need to ensure i submit an analysis to this.
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Feb 4, 2008
Hi all
Iam working in Prodcution ENV,Please help how make space
The log file for database 'Home_alone' is full. Back up the transaction log for the database to free up some log space.
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May 28, 2015
In my environment, there is maintenance plan configured on one of the server and while running DBCC checkdb on a database of size around 200GB, log file usage of tempdb is increasing and causing the maintenance job to fail.
What can I do to make the maintenance job run successfully, size of the tempdb database is only 50GB and recovery model is set to simple. It cannot be increased as the mount point on which it is residing is 50GB.
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Feb 27, 2008
Is there a way of creating an alert on free disk size?
I mean by using WMI event alert
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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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Mar 1, 2005
Hi All,
When i run sp_spaceused on one of my database, PROD, it gives the following output
database_name: PROD
database_size: 4268.00 MB
unallocated space: -789.82 MB
reserved: 4654920 KB
data: 2929008 KB
index_size: 327272 KB
unused: 1398640 KB
Why is that the unallocated space is negative ?
On the drive where the datafiles resides there is enough free space . Also, the datafile and transaction are set to auto grow with unlimited file growth
FYI - the OS is Windows 2000 and the DB is SQL Server 2000 with SP3
Appreciate your time and help on this.
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May 7, 2008
xp_fixeddrives gives the free space on the server drives. Is there a xp which gives the actual size of the drive?
I need to calculate the %space used!
------------------------
I think, therefore I am - Rene Descartes
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May 7, 2008
is there a tsql command that returns the amount of disk space available. I want to set up a job to run and email if it gets to a certain level.
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Jul 26, 2002
How do I find the available free space in the database, in the Database and the Log Segment
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Jun 2, 2003
Hi, I have linked to 50 servers and use dynamic query (exec @sqlString8000)...
to get info about 1000 databases.
Now I wand to use xp_cmdshell to check each server C: fress space, how could I return the last 2nd line value to a global ##temp table?
<<5 Dir(s) 2,169,880,576 bytes free>>
<<NULL>>
thanks
-D
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Dec 21, 2006
Hi All,
I was wondering if anybody has the script to view the free disc space. Currently I am using xp_fixeddrives stored procedure, but it is undocumented and might not be supported in SQL Server 2005.
Thanks.
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Apr 25, 2001
I would like to know how to determine how big log and data space is, and how much of this space is free. I would like to create a script to warn me when less than 20% free space is left in log as well as data.
Ruud
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Nov 5, 2004
I've gone through the forum and have seen several others with a similar situation. I recently noticed my .mdf file grew to 200GB yet the data in the file is only about 40GB. I run sp_spaceused and get the following: database_size = 176GB, unallocated space = 134GB, reserved = 43GB, data = 17GB, index_size = 19GB, unused = 6GB.
I've tried "dbcc shrinkdatabase (mydb, truncateonly)", tried restarting server, tried running a maintenance plan including a reindex of the database, and I don't know what to do next.
Does anyone know how to free up this space?
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Oct 10, 2005
Hi:
How can i get the Total and Free space of my filegroups, do you have some script for that?
Thnaks :eek:
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Sep 19, 2005
Hi,
While I am importing few data to my SQL Server (2000) database, the free space is gettig increased in GBs. The database's File Growth is 1 MB (same for both Data Files and Transaction Files). The same database I restored on another PC and did the same process, it is working fine as there is no enormous growth in Free Space.
Any idea why this is
Regards,
Eldho
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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 3, 2015
My disk drive was full. So I deleted some records. Then I tried to shrink and it indicated available free space of around 5GB as indicated in the below image.
Once I ran the shrink for data file, though it completed successfully I didn't get the 5GB space as indicated. For log file shrink it shows available space of 200MB and when I run a log file shrink it does free up 200MB as indicated. So why is it not working with data file shrink? What am I doing wrong?
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Mar 5, 2002
Hi,
I have some space available in the database, I tried dbcc shrink database and srrink file. I am not getting the disk space. But the amount of free space on the database sometime get increased.
Any help please
Thanks
John Jayaseelan
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Apr 11, 2002
Hi friends ,
I have a database with around 2 GB space for the data and 5.8 GB for the
transaction log .
Now the problem is i do not have any more space on the system and data files requires more space than 2 G.B to execute some stored procedures .
Is it possible to decrease some space of the transaction log , say from 5.8 GB to 2 GB and allocate it to the data files .
My data and log files are on different drives . I did not find anything related to this topic in the BOL .
Can somebody help me with this problem ? Anthing related to this issue will be of great help to me since i have no expertise in this field .
Thanks and Regards
Christine S.
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Jun 15, 2003
Hi,
I have to rebuild a clustered index.I want to know how to find out the free space in a database ?
I know that DBCC SQLPERF ( LOGSPACE )
will give free space in a log space.
Thanks,
copernicus.
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Apr 6, 2005
hi,
I'm trying to calculate how much unused space i have on one datafile. My main goal is to determine the max space i can save by doing a dbcc shrink.
Any help is greatly appreciated.
ThanKs in advance.
Al
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Jul 12, 2012
I inherited a SQL server (2005) that sits on a Windows 2003 box (upgrading to 2008 R2 and Win2008, ASAP) and on our SQL Data Drive (260GB - 22GB free) we have 16 databases (that are associated with our primary application). One database in particular is causing me quite a bit of pain - on Tuesdays. This table will consume all available free space (save 700kb) and place it within it's 'reserved' space. It's not being used and I can reclaim it by shrinking. I have done this for 3 consecutive weeks now and I have always thought that shrinking is not really a best practice.
Based on a job I scheduled to spit out various database stats I discovered the following:
Somewhere after 11pm on Monday (and on or before 11:30pm) the reserved space goes from 9GB down to 23 then 37MB on this particular database.
After 1:30am on Tuesday (and on or before 2:00am) the database consumes nearly all available disk space and thus expands its reserved space to 28GB
I believe it has something to do with the Indexes being rebuilt - per the Maintenance Plan the Index Rebuild is supposed to occur every Monday @ 11pm. On 6/18 it ran from 11pm - 11:44pm with no problems. Starting on 6/26 (and subsequently 7/2 and 7/9) they have started at 11 and ended anywhere between 2 - to 3 hours later. And with the following error:
Failed-1073548784) Executing the query "ALTER INDEX [PK_activityLog] ON [dbo].[activityLog] REBUILD WITH ( PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, SORT_IN_TEMPDB = OFF, ONLINE = OFF ) " failed with the following error: "Could not allocate a new page for database 'FA_PROD_SDDS' because of insufficient disk space in filegroup 'PRIMARY'.
Create the necessary space by dropping objects in the filegroup, adding additional files to the filegroup, or setting autogrowth on for existing files in the filegroup. The statement has been terminated.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.
The database 'FA_PROD_SDSS' is the one that I am having issues with.
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Jun 30, 2015
what is the best way to make free space in tempdb?
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Apr 26, 2001
hello everyone,
I have a question about the under what circumstances will a large database with mostly free space not shrink?
thanks
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Nov 29, 2000
does anyone know if tempdb can be physically moved to a different partition on a disk drive on SQL Server 7.0? Since it can't be backed up I'm hesitant to use the sp_detach/sp_attach procedure because I don't want to crash it. If nothing else is available, I can attempt moving it this way at the end of the day and then just reboot to get tempdb back up again if the server fails, but I'd really appreciate a suggestion from someone who has more know-how than I do about system table operations. Thanks again
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May 6, 2004
I've faced with this problem in my DB:
There are some tables that suffer inserts and deletes daily. These tables have 3 nonclustered indexes including the pk.
I perceived that the space used for these tables are growing day after day even ocurring daily deletes.
These inserts and deletes follow the keys of the pk in ascent order.
I ran DBCC SHOWCONTIG on the tables and got results like this:
- Avg. Bytes Free per Page.....................: 7996.3
When I transform the pk to clustered this problem doesn't happen.
You realized the consequence of this: the users complains because the DB is without space, but it's not true!
Anybody could help me to understand why the extents are not being deallocated?
Thank's for help!
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Jul 14, 2004
Hi all,
I have to find free disc space in a drive from SQL Query and i am using MSSQL200. Does any body know the command for the same.
Also if i want to find hard disk space of a different machine on network, it is possible to get the data??
Also can i get the CPU/Memory usage data of our machine by some SQL/C++ commands??
Please let me know if u know any of the answer...
thanks
Alok
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