TempDB Tran Log Growing Slowly - Yet We Are In Simple Mode!
Jul 20, 2005
Something strange is happening to our SQL Server DB (2000). The
tempdb transaction log file continues to grow (quite slowly) for no
apparent reason. We have it in simple mode, and I have tried a manual
checkpoint command and manual shrink (of the log file only). There
are no unusual SQL's (large or small) going on. A "heavy hitter" would
make it grow fast, not 10 MB every 30 minutes or so. This server has
been in production for over a year with no similar issues to this.
Anyone encounter a similar situation? This started (as far as we can
tell) sometime yesterday. It is growing about 200 MB a day, and is up
to 600 MB now, with all but 8 MB "used". For now we added space, but
of course that is not a long term solution. The two "data" files
(each had a 200 MB initial allocation) have never gone much above 100
MB each used (they are each about 100 MB now and have been that way
for several days, but have shrank and grown). There are about 30
small to medium sized "regular" databases on this instance.
Any help would be appreciated, especially if there is a way we can fix
this without bouncing the engine (I know, wishful thinking...). The OS
is Win 2000, SP3. SQL Server is at 2000, SP 3a.
THANKS IN ADVANCE!
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Dec 3, 2007
hi,
we have a SQL Server 2000 database which we set to 'SIMPLE' recovery mode at 6pm (due to nightly large data loads). We revert back to 'FULL' recovery mode at 6am.
My understanding was that in 'SIMPLE' recovery mode, the transaction log would not grow because it would automatically be truncated after a checkpoint. However this is not the case. I thought perhaps it could be due to a long running uncomitted transaction, but when I ran 'dbcc opentran', the oldest running transactions doesn't last for more than a couple minutes. I manually run a 'checkpoint' command as well in the hope of forcing the transaction log truncation. I repeat this a couple of times to no avail. When I run 'dbcc sqlperf(logspace)' , I can still see the transaction log growing.
It is not until I run 'backup log db with truncate_only' that the transaction log gets truncated.
I do not understand, why the transaction log does not get automatically truncated in SIMPLE recovery mode?
Andrew
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May 16, 2006
I have a database of 22 gb in sql 2000, my database option is set to full recovery mode, the problem i'm having is the tran log is growing too fast, this morning it was 24 gb, more than the database size. Can anyone help how I can keep it in a managable size?
Thanks in advance!!
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Feb 2, 2000
In SQL Server 7.0 sp1 (NT 4.0 sp5) I have a server that
has a tempdb database that continues to grow. This server
contains the database for SMS. Over the weekend, the tempdb
had grown so much that it filled up the drive (37GB). I have
shrunk it down to a much more reasonable size and put a limit
on how large it can grow. I'm noticing today that it is
beginning to grow again. Is there a way I can look at the
information that is in tempdb right now? I have to think
that there are open transactions for some reason that can't
commit. I know that tempdb gets cleared out when SQL Server
is restarted, but I can't be restarting it this often.
On Microsoft's website, I did find an article about SMS Y2K
queries using large amounts of Tempdb and failing to complete.
The solution they have in this article Q234912 is to install
SMS sp1 which is already installed.
I haven't been able to find any other useful information yet
on this problem. I would appreciate any help you can offer.
Thanks!
Toni
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Apr 9, 2006
Hi there,
My tempdb is growing from its normal size of 800MB to 2GB.
I've been shrinking it using dbcc shinkfile/ dbcc shrinkdatabase.
Everytime I run the command, immediately it says that the execution is completed and successful. However, when I checked the disk space, it remained the same, as though no shrinking is done. Can anyone help?
Also, it was published that restarting the SQL server can re-create tempdb from scratch. I've tried it too, the tempdb just wont go back to its normal allocation. My constraint is limited disk space, would appreciate any good samaritan to give me some help here.
Thanks in advance!
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Sep 10, 2003
I notice this morning that my tempdb grows very fast. I have 26GB in my
hardrive and all the space occupied by tempdb and finaly the qeury got failed due to 0 space in hardrive and there is no space to grow tempdb.
The select query supposed to bring about 40000 rows.
I ran this same query in different server that is not growing even 1 mb.
I checked the tempdb option the Trunc log on checkpoint is true.
Why this problem happening ?.
I have just dbo permission to access all the database.
Do you have any advice regarding this?.
Thanks,
Ravi
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Mar 22, 2004
Hi all.
I have a db application that has been running fine for months. Volumes have been gradually increasing and one day the system locked up.
A stored proc that typically ran in 3 or 4 minutes never returned. The tempdb kept expanding to fill available disk space (100GB). This was the offending statement inside the stored proc:
INSERT INTO cpp (CPPDate,MerchantLink,ReportNumber,FromDate,ToDate ,TransThreshold,DayThreshold,CPPType)
SELECT S.CPPDate,S.MerchantLink,s.ReportNumber, s.FromDate,s.ToDate, S.OccurThresh,s.DaysThresh,'D'
FROM #stuff S, Trans T with (nolock), Supplier P with (nolock)
where T.MerchantNumber in (SELECT MerchantNumber FROM Merchant WHERE MerchantLink = s.MerchantLink)
AND T.TranDate >= S.FromDate
AND T.TranDate <= S.ToDate
AND T.LoadDate <= @ReportDate2
AND (T.SupplierNumber = P.SupplierNumber
AND T.IncludeInCpp = 'Y'
AND P.CountryNumber IN (SELECT CountryNumber FROM REPORTCOMBO WHERE ReportNumber = s.ReportNumber))
GROUP BY CPPDate,Merchantlink,ReportNumber, FromDate,ToDate, OccurThresh, DaysThresh
HAVING COUNT(DISTINCT T.AccountNumber) >= OccurThresh
I realize that a "group by" uses the tempdb, but can't figure out why it would go away rather than returning an error.
I have a workaround in place now. I split this big query into several steps using a cursor. (slower and clumsier, but it works) Statistics are updated daily, i have tried defragging, and reindexing with no success.
Any thoughts would be appreciated. If you need any more details, please let me know.
Thanks in advance.
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Jul 7, 2004
for the first time in my long SQL DBA live I see such a behaviours. My tempdb database is growing every damn second since a this morning. Now it reached 30Gb, the log file is empty (217 Mb).
We use SQL 2000 Ent on Win 2000 Advance Server. Running Siebel Call Center (7.5 ver) with about 300 users.
Some users time to time obtain and hold a huge amount Exclusive locks on the tempdb extents
Where do I look for a leak?
Any ideas?
thx
Dim
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Jun 17, 2008
How do I write a script that will alert me if the tempdb database grows up past 100 MG and stays there?
Jim
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Oct 16, 2007
Hi
We are having problems with our SQL server 2000.
The problem is that on a daily basis we run out of disk space and I always have to run shrinkdatabase on tempdb.
Today we started with 160GB of free space and by the end of the day it was gone!
Yes we do have many jobs running on our SQL server pulling data in from many sources. But I dont know how to find out which job is causing this problem. I have a suspicion that it could be a job that runs hourly that pulls data from Oracle (approximately 10000 rows each time), but that job has been active since the 28th August 2007. We only started running out of space in the past 5 days. Any suggestions would be appreciated as to what is causing this or how to diagnose the problem.
Thanks
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Aug 25, 2015
SQL Server 2008, Tempdb ("ReportServerTempDB")of the report server is growing enormously over 20gb in 3 days. All our reports drive from stored procedures which is a different server from Reportservertempdb. We have no report subscriptions.
We store no snapshots. All we do is run the reports.
I don't know where I start to investigate the issue.
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Jun 16, 2014
The TEMPDB transaction log file keeps growing.The database server is new and the transaction log was presized to 1 GB on installation. After installing a number of databases, the log file grew over a day to 38GB. Issuing a manual checkpoint was the only way to free some space to allow it to be shrunk back to a usable size. The usage of the file is still going up.
I am struggling to find what process is causing the log to be used so heavily. Looking at the log reuse wait desc for tempdb returns "Nothing" and tempdb itself isn't being used very much or growing in size.
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Feb 1, 2008
On my current contract we have a SQL 2005 box with a user database and the tempdb database in 6.5 compatibility mode. I would like to remove the user database and change the tempdbs compatibility mode. When you try and use EM just about everything fails with errors about collation or syntax. From what I have found it could be related to the tempdb being in 6.5 compatibility mode but either way I would like to remove this old unused DB.
My question is after I remove the user DB and reset the tempdb compatibility mode what will or could break? I haven't been able to find much on what would change or what to look out for after the change is made. Has anyone else done this? If so what issues did you face.
Thanks
Doug
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May 22, 2007
I am relatively new to SQL Server so excuse my ignorance.
I have noticed in many of my SQL Server 2005 instances that the tempdb database is very often reporting the log mode as waiting active_transaction or waiting checkpoint.
Is this of concern, how can I determine the cause of these waits and how can they be reduced or eliminated ?
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Dec 19, 2007
I am running an Execute SQL task that does a Begin Tran, then the next task in the sequence is a data task which imports a XML file into two tables. If i doo a Rollback Tran only one of the two tables is rolled back.
Is it possible to have both tables rolled back from one Begin tran command or do i need to split the datatasl into two and treat each import as a seperate issue ?
The connection is set to retainsameconnection
thanks
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May 16, 2008
Can you implemenent Transactional Replication while keeping the Source and Destination DB's in Simple mode?
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Jun 5, 2007
Hi,
On SQL 2000, if I have a large transaction log for my database and I manage to fill it with a single large transaction but it is not set to autogrow, what happens?
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Jan 10, 2008
Which system table is this information held in, i restored over 100 databases and want all of them to be simple mode.
I manually set it each time after each restore, but i want to confirm but i cannot find the sys table to do a select on.
I looked at sys.sysdatabases
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Jul 20, 2005
We have a SQL Server 7.0 database running with trunc. log on chkpt andselect into/bulkcopy checked and need to develop a backup strategy.One of our DBAs insists that since the transaction log is beingtruncated, we can't do a hot backup (a FULL backup in multiuser mode)because if a transaction comes through during the backup it will leavethe backup in an inconsistent state. I'm skeptical, but I don't knowhow SQL Server 7 avoids this problem.If SQL 7 is not truncating the transaction log, it uses thetransaction log to roll forward changes that occurred during thebackup. Obviously if it's truncating the log it must have some way toapply these transactions anyway (such as not doing a checkpoint duringthe backup, backing up the log at each checkpoint, etc.).Can anyone confirm that a hot backup will be valid when trunc. log onchkpt is checked? Does anyone know how SQL 7 accomplishes this?Thanks!James
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Mar 12, 2007
I have several databases that perform daily backups. Ever since I installed SP2, the backup jobs are failing. The logs state that it's because the database recovery mode cannot be SIMPLE, but need to be either FULL or Bulk-Logged.
Can anyone tell me if this is true, and that I do have to change my recovery mode?
Here's the error:
NEW COMPONENT OUTPUT
Microsoft(R) Server Maintenance Utility (Unicode) Version 9.0.3042
Report was generated on "ICIS-SQL-SERVER".
Maintenance Plan: DB Backup
Duration: 00:08:05
Status: Warning: One or more tasks failed..
Details:
Back Up Database (Transaction Log) (ICIS-SQL-SERVER)
Backup Database on Target server connection
Databases that have a compatibility level of 70 (SQL Server version 7.0) will be skipped.
Databases: All user databases
Type: Transaction Log
Append existing
Task start: 2007-03-10T05:08:09.
Task end: 2007-03-10T05:08:09.
Failed:(-1073548784) Executing the query "BACKUP LOG [hl7 db_SamirTesting] TO DISK = N'D:\mssql\backup\hl7 db_SamirTesting\hl7 db_SamirTesting_backup_200703100508.trn' WITH NOFORMAT, NOINIT, NAME = N'hl7 db_SamirTesting_backup_20070310050809', SKIP, REWIND, NOUNLOAD, STATS = 10
" failed with the following error: "The statement BACKUP LOG is not allowed while the recovery model is SIMPLE. Use BACKUP DATABASE or change the recovery model using ALTER DATABASE.
BACKUP LOG is terminating abnormally.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.
Command:BACKUP LOG [hl7 db_SamirTesting] TO DISK = N''D:mssqlackuphl7 db_SamirTestinghl7 db_SamirTesting_backup_200703100508.trn'' WITH NOFORMAT, NOINIT, NAME = N''hl7 db_SamirTesting_backup_20070310050809'', SKIP, REWIND, NOUNLOAD, STATS = 10
GO
BACKUP LOG [dg_efilm_153] TO DISK = N''D:mssqlackupdg_efilm_153dg_efilm_153_backup_200703100508.trn'' WITH NOFORMAT, NOINIT, NAME = N''dg_efilm_153_backup_20070310050809'', SKIP, REWIND, NOUNLOAD, STATS = 10
GO
BACKUP LOG [hl7 db] TO DISK = N''D:mssqlackuphl7 dbhl7 db_backup_200703100508.trn'' WITH NOFORMAT, NOINIT, NAME = N''hl7 db_backup_20070310050809'', SKIP, REWIND, NOUNLOAD, STATS = 10
Back Up Database (Transaction Log) (ICIS-SQL-SERVER)
Backup Database on Target server connection
Databases that have a compatibility level of 70 (SQL Server version 7.0) will be skipped.
Databases: All user databases
Type: Transaction Log
Append existing
Task start: 2007-03-10T05:08:09.
Task end: 2007-03-10T05:08:09.
Failed:(-1073548784) Executing the query "BACKUP LOG [dg_efilm_153] TO DISK = N'D:\mssql\backup\dg_efilm_153\dg_efilm_153_backup_200703100508.trn' WITH NOFORMAT, NOINIT, NAME = N'dg_efilm_153_backup_20070310050809', SKIP, REWIND, NOUNLOAD, STATS = 10
" failed with the following error: "The statement BACKUP LOG is not allowed while the recovery model is SIMPLE. Use BACKUP DATABASE or change the recovery model using ALTER DATABASE.
BACKUP LOG is terminating abnormally.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.
Command:BACKUP LOG [hl7 db_SamirTesting] TO DISK = N''D:mssqlackuphl7 db_SamirTestinghl7 db_SamirTesting_backup_200703100508.trn'' WITH NOFORMAT, NOINIT, NAME = N''hl7 db_SamirTesting_backup_20070310050809'', SKIP, REWIND, NOUNLOAD, STATS = 10
GO
BACKUP LOG [dg_efilm_153] TO DISK = N''D:mssqlackupdg_efilm_153dg_efilm_153_backup_200703100508.trn'' WITH NOFORMAT, NOINIT, NAME = N''dg_efilm_153_backup_20070310050809'', SKIP, REWIND, NOUNLOAD, STATS = 10
GO
BACKUP LOG [hl7 db] TO DISK = N''D:mssqlackuphl7 dbhl7 db_backup_200703100508.trn'' WITH NOFORMAT, NOINIT, NAME = N''hl7 db_backup_20070310050809'', SKIP, REWIND, NOUNLOAD, STATS = 10
Back Up Database (Transaction Log) (ICIS-SQL-SERVER)
Backup Database on Target server connection
Databases that have a compatibility level of 70 (SQL Server version 7.0) will be skipped.
Databases: All user databases
Type: Transaction Log
Append existing
Task start: 2007-03-10T05:08:09.
Task end: 2007-03-10T05:08:09.
Failed:(-1073548784) Executing the query "BACKUP LOG [hl7 db] TO DISK = N'D:\mssql\backup\hl7 db\hl7 db_backup_200703100508.trn' WITH NOFORMAT, NOINIT, NAME = N'hl7 db_backup_20070310050809', SKIP, REWIND, NOUNLOAD, STATS = 10
" failed with the following error: "The statement BACKUP LOG is not allowed while the recovery model is SIMPLE. Use BACKUP DATABASE or change the recovery model using ALTER DATABASE.
BACKUP LOG is terminating abnormally.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.
Command:BACKUP LOG [hl7 db_SamirTesting] TO DISK = N''D:mssqlackuphl7 db_SamirTestinghl7 db_SamirTesting_backup_200703100508.trn'' WITH NOFORMAT, NOINIT, NAME = N''hl7 db_SamirTesting_backup_20070310050809'', SKIP, REWIND, NOUNLOAD, STATS = 10
GO
BACKUP LOG [dg_efilm_153] TO DISK = N''D:mssqlackupdg_efilm_153dg_efilm_153_backup_200703100508.trn'' WITH NOFORMAT, NOINIT, NAME = N''dg_efilm_153_backup_20070310050809'', SKIP, REWIND, NOUNLOAD, STATS = 10
GO
BACKUP LOG [hl7 db] TO DISK = N''D:mssqlackuphl7 dbhl7 db_backup_200703100508.trn'' WITH NOFORMAT, NOINIT, NAME = N''hl7 db_backup_20070310050809'', SKIP, REWIND, NOUNLOAD, STATS = 10
Back Up Database (Transaction Log) (ICIS-SQL-SERVER)
Backup Database on Target server connection
Databases that have a compatibility level of 70 (SQL Server version 7.0) will be skipped.
Databases: All user databases
Type: Transaction Log
Append existing
Task start: 2007-03-10T05:08:08.
Task end: 2007-03-10T05:08:09.
Failed:(0) Database 'hl7 db_SamirTesting' will not be backed up because it does not have its recovery model set to Full or BulkLogged.
Back Up Database (Transaction Log) (ICIS-SQL-SERVER)
Backup Database on Target server connection
Databases that have a compatibility level of 70 (SQL Server version 7.0) will be skipped.
Databases: All user databases
Type: Transaction Log
Append existing
Task start: 2007-03-10T05:08:08.
Task end: 2007-03-10T05:08:09.
Failed:(0) Database 'dg_efilm_153' will not be backed up because it does not have its recovery model set to Full or BulkLogged.
Back Up Database (Transaction Log) (ICIS-SQL-SERVER)
Backup Database on Target server connection
Databases that have a compatibility level of 70 (SQL Server version 7.0) will be skipped.
Databases: All user databases
Type: Transaction Log
Append existing
Task start: 2007-03-10T05:08:08.
Task end: 2007-03-10T05:08:09.
Failed:(0) Database 'hl7 db' will not be backed up because it does not have its recovery model set to Full or BulkLogged.
Back Up Database (Full) (ICIS-SQL-SERVER)
Backup Database on Target server connection
Databases that have a compatibility level of 70 (SQL Server version 7.0) will be skipped.
Databases: All databases
Type: Full
Append existing
Task start: 2007-03-10T05:00:06.
Task end: 2007-03-10T05:08:08.
Success
Command:EXECUTE master.dbo.xp_create_subdir N''D:mssqlackupmaster''
GO
EXECUTE master.dbo.xp_create_subdir N''D:mssqlackupmodel''
GO
EXECUTE master.dbo.xp_create_subdir N''D:mssqlackupmsdb''
GO
EXECUTE master.dbo.xp_create_subdir N''D:mssqlackuphl7 db_SamirTesting''
GO
EXECUTE master.dbo.xp_create_subdir N''D:mssqlackupdg_efilm_153''
GO
EXECUTE master.dbo.xp_create_subdir N''D:mssqlackuphl7 db''
GO
BACKUP DATABASE [master] TO DISK = N''D:mssqlackupmastermaster_backup_200703100500.bak'' WITH NOFORMAT, NOINIT, NAME = N''master_backup_20070310050006'', SKIP, REWIND, NOUNLOAD, STATS = 10
GO
BACKUP DATABASE [model] TO DISK = N''D:mssqlackupmodelmodel_backup_200703100500.bak'' WITH NOFORMAT, NOINIT, NAME = N''model_backup_20070310050006'', SKIP, REWIND, NOUNLOAD, STATS = 10
GO
BACKUP DATABASE [msdb] TO DISK = N''D:mssqlackupmsdbmsdb_backup_200703100500.bak'' WITH NOFORMAT, NOINIT, NAME = N''msdb_backup_20070310050006'', SKIP, REWIND, NOUNLOAD, STATS = 10
GO
BACKUP DATABASE [hl7 db_SamirTesting] TO DISK = N''D:mssqlackuphl7 db_SamirTestinghl7 db_SamirTesting_backup_200703100500.bak'' WITH NOFORMAT, NOINIT, NAME = N''hl7 db_SamirTesting_backup_20070310050006'', SKIP, REWIND, NOUNLOAD, STATS = 10
GO
BACKUP DATABASE [dg_efilm_153] TO DISK = N''D:mssqlackupdg_efilm_153dg_efilm_153_backup_200703100500.bak'' WITH NOFORMAT, NOINIT, NAME = N''dg_efilm_153_backup_20070310050006'', SKIP, REWIND, NOUNLOAD, STATS = 10
GO
BACKUP DATABASE [hl7 db] TO DISK = N''D:mssqlackuphl7 dbhl7 db_backup_200703100500.bak'' WITH NOFORMAT, NOINIT, NAME = N''hl7 db_backup_20070310050006'', SKIP, REWIND, NOUNLOAD, STATS = 10
Please help,
-tim
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Jun 26, 2002
Hi,
What is the impact of changing the recovery mode of a database from Full to simple? The client I am at has set their database to full recovery mode, set their log files to grow automatically. But I don't think they have ever done a backup of their transaction log (it has grown to over 19Gig, where the data portion of the database is only around 400M).
What is the impact of truncating the transaction log now? After truncating it, i would like to shrink the file to a managable number and change the recovery mode to simple (they don't need transaction log backups)
Any info on this would be appreciated.
Thanks in advance
Jim
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Oct 8, 2007
Hi,
I want to rollback my t-sql if it encounters an error. I wrote this code:
begin tran mytrans;
insert into table1 values (1, 'test');
insert into table1 values (1, 'jsaureouwrolsjflseorwurw'); -- it will encounter error here since max value to be inputted is 10
commit tran mytrans;
I forced my insert to have an error by putting a value that exceeds the data size. However, I didn't do any rollback. Anything i missed out?
cherriesh
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Oct 10, 2005
Hi ,I have set up my database to be using "Simple" mode. This will not log anytxns ?I have got the err message saying the log file is full and i need to do atxn log backupi do not understand why , could anyone kindly advise ?tks & rdgs--Message posted via SQLMonster.comhttp://www.sqlmonster.com/Uwe/Forum...eneral/200510/1
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Jan 25, 2008
I have a database that is set to Full recovery model, I would like to switch to simple. I must perform some procedure before doing so?
The size of the transaction log is very high in this database, I would like to decrease it before moving to simple, have a problem doing that?
Thank You,
Ralph Haddad
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Feb 14, 2007
When we do a full database backup manually, we are seeing the trn file reflect the current date/time, but we are not seeing the mdf reflect the new date/time. And we are not seeing the transaction log file decrease in size. the recovery mode is set to full, do we need to change to simple to see both the mdf being backup'ed?
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Oct 6, 2006
Following update runs 20 hours till TEMPDB grows up to 400GB and runs out of space with error message:
Msg 1105, Level 17, State 2, Line 8
Could not allocate space for object 'dbo.Large Object Storage System object: 440701391536128' in database 'tempdb' because the 'PRIMARY' filegroup is full. Create disk space by deleting unneeded files, dropping objects in the filegroup, adding additional files to the filegroup, or setting autogrowth on for existing files in the filegroup.
T_PERF_LOC has 30,000,000 rows and T_MASTER_LOC has 2,000,000 rows
There is and index on V_KEY in both tables. CHANNEL_KEY is of Integer datatype and not indexed.
F_MAP function performs simple lookup on very small table (10 rows)
UPDATE A
SET CHANNEL_KEY = OTHERDB.DBO.F_MAP(b.ID)
FROM T_PERF A
JOIN dbo.T_MASTER b
on a.V_KEY = b.V_KEY
Any ideas why?
Thanks
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Jun 2, 2015
Is this Possible, If database is in Simple recovery Mode and the ldf size gets increased?? .
mdf size : 159 GB (171,383,717,888 bytes)
ldf size : 6.46 GB (6,945,505,280 bytes).
My question is if the recovery model is in Simple Mode then why the log gets generated high.
dbcc sqlperf(logspace) --output
DATABASE Logsize(MB) Log space used(%) status
mam 6623.742
0.4305579
0
Is there any issue or it is Normal.
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Jul 30, 2015
My understanding is that the log file is not supposed to grow if the database is under simple recovery mode.I am in a situation where the log grows if do any inserts that involve millions of rows.How do i make sure that it does not grow?
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Dec 21, 2007
I am amazed to see this morning that log file consuming whole disk space even though the database is in simple recovery mode.
What could be the reasons to fill in the space even in simple recovery mode??
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Jun 30, 2015
I have a small, ~10GB SQL 2008 R2 database, that was setup with simple recovery. We do full backup each night at midnight when no one is using the database. Is there any problems with doing differential backups during the day when users may be writing to the database? Could I even do hourly differential backups while users are using the database? I'm conflicted about switching over to full recovery mode and using transaction logs to have the ability restore data between backups. If I can do a couple daily differential backups while users are using the database during the day, in addition to our nightly full backups, than I live with simple recovery mode.
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Jun 15, 2015
Wondering whether I can have following included in a script file:
1. set the current single user db from Full to Simple recovery mode.
2. Checkpoint and shrink the transaction log file (release all unused space)
3. set the current single user db from Simple recovery to Full recover mode.
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Dec 8, 2007
Hi there - can anyone advise on the following issue. We have recently performed some server side tracing on a particular SQL instance over 24hr period. We are now attempting to load these into a database for analysis. Here lies the problem.
When we are loading the profiler trace files (one at a time) into the database the transaction log is growing at an excessive rate. Even though the database is in SIMPLE mode.
We are loading the traces using the command:
INSERT INTO sqlTableToLoad
SELECT * FROM ::fn_trace_gettable('MytraceFileName', DEFAULT)
Can anyone advise how we could possibly get round this issue as we're running out of space due to the transaction log.
Thanks
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Jul 27, 2015
I have a database that I am trying to recover space from, it consists mostly of unallocated space, but I can’t seem to get that unused space released.
Database size: 40,245.13 MB
DatafileMB: 38,063.63, DataAvailableMB: 37,085.15
LogfileMB: 2181.51
Sysfiles shows:
fileidgroupidsizemaxsizegrowthstatusperfname
114872144-112820SomeDB
202792332684354561010486420SomeDB_log
The DB is in simple recovery mode. There are no open transactions (used dbcc opentran).
The server is running SQL Server 2014 and the DB is in compatibility mode SQL Server 2008 (100). It was upgraded to 2014 a month or two ago.
I have tried to re-size the log to 100mb, but any way I have tried (none gave errors), the log file remains the same size. I have tied to shrink the log file (through the UI and via DBCC commands) without success; no errors, but also no change in file size.
I have checked Log Reuse Waits, just in case, and as expected it showed “NOTHING” (select log_reuse_wait_desc, name from sys.databases)
I tried running a checkpoint, but that did not allow any resize or shrink to work.
I have tied creating large transactions to move the used point in the log file, in case this was the issue. I did this by creating tables that I drop after large inserts. While it shows me that the log space % used increased, the log file still does not allow the space to be reduced.
The following is what I was using for the transactions to get the log used.
BEGIN TRAN
select a.* into testtable from sysobjects a, sysobjects b, sysobjects c
ROLLBACK TRAN
Each insert creates 93,576,664 rows.
Running dbcc SQLPerf(logspace) :
DBLogSize(MB)LogSpaceUsed(%)Status
SomeDB2181.534.204890
Running dbcc loginfo:
RecoveryUnitIdFileIdFileSizeStartOffsetFSeqNoStatusParityCreateLSN
0211437342728192602640
02114373427211437424645701280
Do I just need to continue running large transactions until the log space used gets high enough to get the “end point” in the log to really move? Is there an easier way to accomplish this (I have several DBs that have the almost identical problem), what I am using moves the Log Space Percent Used about a percent on each execution.
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