Here with i have attached the execution plan, In that i have tempdb spill over in sort operation. i have created index to sort even it needs temp db spill over. [URL]....
View 9 RepliesI've been trying to make the following query more performant by breaking it up into smaller pieces.
SELECT MT.A3+MT.A4 AS A34,MT.A3
-- ,M.*
FROM
Master_TAB M
JOIN (SELECT M.A1,t3.A3,t3.A4,M.A6,M.A2,ROW_NUMBER() OVER (PARTITION BY A1,A6,A3,A4 ORDER BY A5 DESC) AS rownum
[Code] ....
I know that the Spill is caused by the Sort but I can't remove the sort (sort can't be done in front end). My master table had 1.7 million rows and almost 200 columns (bad design? I know but can't be changed as there's too much that would be affected) every row is little over 1KB
Here's my attempt...
-- MASTER_TAB has 1.7 million rows and 50 columns
CREATE TABLE [dbo].[tmp_ABC](
[A1] [varchar](13) NOT NULL,
[A2] [varchar](5) NOT NULL,
[A3] [varchar](4) NOT NULL,
[A4] [varchar](4) NOT NULL,
[A5] [int] NULL
) ON [PRIMARY]
[Code] ...
This is the Query that is causing the Spill (in reality I'm supposed to bring back all 200 columns fro the master table but for debug purposes I limited the columns)
Select c.A3+c.A4 as A34, c.A3, c.A1
-- M.*
from tmp_DEF c
join MASTER_TAB M on M.A1 = c.A1 and M.A2 = c.A2
order by c.A3, C.A4
if I just run the following I get no spill:
Select c.A3+c.A4 as A34, c.A3, c.A1
from tmp_DEF c
order by c.A3, C.A4
as soon as I add the Master table as a Join I get the Spill...
I read many articles, tried many suggested things (creating indexes... clustered, non-clustered) without success. Maybe I'm totally in Left Field and should enhance the performance going another route?
As far as i know sql server iterators spill to tempdb when estimation number of rows less than actual number of rows ? for my example estimation > actual,but sort iterator still spill to temdb.
View 6 Replies View RelatedMessage: Executed as user: NT AUTHORITYSYSTEM. The transaction log for database 'tempdb' is full. To find out why space in the log cannot be reused, see the log_reuse_wait_desc column in sys.databases [SQLSTATE 42000] (Error 9002). The step failed in my sql server agent job i have the above error, this type of errors i got some of multiple jobs.
View 9 Replies View RelatedIs there a formula for calculating how expensive a transaction will be in terms of disk space used before its run. I dont want it accurate to the MB, but rough enough so I can determine how much additional space to assign to a transaction log or SAN volume.
Currently we're reindexing ~25billion rows, nothing too wide, say 12 columns consisting of 1 varchar(50) and the rest ints, bits and money.Roughly speaking if I reindex the clustered index on an int indetity, (with sort_in_tempdb) how would I calculate the the disk space used?
I have a server with 2 processors, 12 cores each making it a 24 core logical system.
My tempdb has 4 datafiles and 4 logfiles created.
I know creating more number of log files in tempdb may not make sense, but how many tempdb data files are supposed to be created?
Should it be 24?
I have question about tempdb needs to be configured 100GB 64kb block size.its fresh installation.
how to allocate the file sizes.still im not sure how many log files needs to be created with 100GB equals to 64KB block size.
what is 64KB block size and how to divide the logfiles 64KB into the 100gb or 50GB?
what is 64 KB cluster has 128 sectors?
tempdb drives should be formatted with a 64K allocation? how many files needs to created for good performance with 50GB or 100GB? ot 1TB
I proposed on a new server that we separate Data Files, Log Files, tempDB, Backups, etc. onto separate LUNS on a SAN with High Speed Solid State Drives.I was told that with the new technology with solid state SAN's that it would decrease performance and that it did not work the same way as it did when you had RAID 5's etc.I thought that if things were cared out correctly by a SAN Administrator they would know how to configure for optimal performance.
View 2 Replies View RelatedHi.
I really need to call an external application with GUI but xp_cmdshell does not allow it. Is there any way to do this?
Thanks in advance for replays.
Has anyone seen the SQL Server error:
"tempdb is skipped. You cannot run a query that requires tempdb"?
We're running a .Net web application with a SQL Server 2000 backend, and we get the error intermittently. Restarting the SQL Server service seems to fix it, as it causes tempdb to be rebuilt, but this isn't a long term solution. Any direction or hints would be greatly appreciated. Thanks!
- Mike
Hi,
I am installing the SQL server 7.0 as a production server and as soon as the server is started, within a week the date will be around 10 millinon rows, so I want to know how much space should I allocate for the tempdb and what should be the incremental percentage of the the tempdb(New server).
thanks in advance,
Madhu.
Hi,
I believe our problem is related to tempDB on the specific server but I would like to know if anybody has come across a similar issue.
We have an SQL statement similar to the following.
BEGIN TRANSACTION
CREATE #tableA
INSERT #tableA SELECT (expression A)
INSERT #tableA SELECT (expression B) WHERE (condition)
COMMIT TRANSACTION
First, let me briefly expand on the second INSERT as this may help when reading the points below.
INSERT #tableA
SELECT ...
FROM ... INNER JOIN tableB
WHERE NOT EXISTS (SELECT ... FROM #tableA WHERE #tableA.columnA = tableB.columnB)
This script works fine on all of our servers except one, which is why I believe tempDB may be involved. After an analysis of the problem, we have the following results,
- If we remove the Transaction, the script succeeds.
- If we leave the Transaction and remove either the first or second INSERT, the script succeeds.
- If we leave the Transaction and both Insert statements and remove the WHERE (condition) from the second Insert, the script succeeds.
- If we reduce the row counts from all source tables concerned by 90%, the script still does not succeed.
- The script had succeeded the week before on the server in question.
Finally, if we replace #tableA with tableA, the script succeeds.
Any help on this would be greatly appreciated.
Thanks.
Can someone please explain what the tempdb database is responsible for in SQL Server 2000. The database and log file has grown extremely large and I cannot backup this table for some reason. Thanks.
View 1 Replies View RelatedI try to find some feedback regarding setting the TempDB files on a RAM disk.Specifically I am looking for "production results" that could show the difference/benefit of such an usage.The tests on physical server and VM I already made have shown a boost in overall SQL Server 2012 performance on SQL Server instances housing data for SharePoint 2013 and Dynamics AX 2012 R2.Graphic below show differences between 5 different configuration on the same physical server:
- Physical HD: Server with local HD
- Physical SANEX1PRD: Server with TempDB files stored on a low-end SAN
- Physical SAN1: Server with TempDB files stored on a high-end SAN (around 100000 IOps)
- Physical SAN1 Jumbo: same setup with Jumbo Frame activated on NIC and DB engine
- Physical RAMdrive: with TempDB files stored on a 16 GB soft RAM drive within OS memory
Results were really impressive for the DB engine housing Dynamics AX data. My colleagues from the SharePoint team told me it also boosted a bit overall SharePoint performances but they did not have any baseline comparison to show.If you have some feedback, results, links, whatever I am interested.Indeed before setting this to all our SQL Server 2012 instances I y rather collect some *real world* feedback.
It's been a long time since I've tried this, but I have a SQL Server that needs to be restored (including master) to a server whose drives and corresponding folders match the source server, with the exception of tempdb. When SQL Server initially starts I believe it will fail since it cannot find tempdb. I just don't recall if it fails to startup or if it starts up reporting errors and recreates tempdb in the same location as master. Does anyone recall the steps needed to point SQL Server to the new location of tempdb?
Dave
My prod server (only default instance) is configured TempDB 1024 MB data and Log 200MB. when I run 'sqlperf logspace' it shows most of time around 45% 'log space used'. There nothing going on the instance when I ran 'whoisactive' and select * from sys.sysprocesses where dbid = 2!!!
So my questions are is this normal to see log space around 45%, how to find what what CAUSED the tempdb log space to grow 45%? Is there something to do about it?
I am seeing select * from sys.sysprocess where blocked<>0 is always the report server
ReportServer.dbo.GetSessionData;1 is blocked by ReportServer.dbo.WriteLockSession;1
We have different reporting servers using same database.
Is it require to rebuild indexes on report server and report server temp db on daily basis?
Hi There
In Sql Server 2005 sys.dm_db_task_space_usage is great for tracking down temdb space issues.
I have tempdb space issues in sql server 2000, how do i get the same info in SS2000 ? IE: What spid is using the most tempdb space ?
Thanx
I have an ASP.Net (C# 2.0) application that has been using SQL Server 2005 Standard Edition with Service Pack 1 to hold the session state in a testing environment. Currently, the session state is being stored in TempDB, rather than the ASPState database. This has worked very well for us until yesterday. We installed SQL Server 2005 Service Pack 2, as well as the Critical Update for Service Pack 2 (KB933508). Once the SQL server was rebooted, I got the following error message when I tried to access the web application.
The SELECT permission was denied on the object 'ASPStateTempApplications', database 'tempdb', schema 'dbo'.The SELECT permission was denied on the object 'ASPStateTempApplications', database 'tempdb', schema 'dbo'.The INSERT permission was denied on the object 'ASPStateTempApplications', database 'tempdb', schema 'dbo'.
In the web.config file for the application, I have a SQL username and password defined that can access the ASPState database. To correct this issue, I had to give this user db_datareader and db_datawriter access to tempDB.
Has anyone else run across this problem, and is it related to SQL Server 2005 Service Pack 2?
Whenever SQL Server get restarted, tempdb gets recreated with its last configuration.
let me know where SQL Server store tempdb configurations? How does it know how many Tempdb files it needs to create on restart?
How to solve the below blocking issue
One of our production server is configured with Always on with sql cluster.
We are getting frequently blocking
Waiting Resource Key Type: Key
WaitType: LCK_M_S
WaitResourceDatabaseName : ReportServerTempDB
WaitingSessionProgramName: Report Server
BlockingSessionProgramName: Report Server
WaitCommandType: Select
WaitingCommandText: Create Procedure dbo.checksessionLoak @sessionID...
I am supporting a system that needs to allow users to have access to TempDB.
I set these users up using the GUI, but whenever the server is restarted, these users permissions are wiped out and the db_owner permission is lost and I have to manually go in and apply the permissons for the database to work again, it happens on most reboots but not all.
Is there anyway to keep these users permissions when the server is rebooted?
Your help is most appriciated.
P.S Could I create a stored procedure that when ever the Server is rebooted the procedure would recreate these permissions?
If I need to do this how would I go about doing this?
Please forgive my ignorance, I am by no means a SQL Expert, but have encountered a strange issue.
I have 6 SQL Servers, Primarily SQL 2005 (one older SQL 2000) all loaded on Windows Server 2003 SP1.
We use the servers for a proprietary database that we created which is the backend to a software package we sell.
The issue I have is: We have added a Security account to the servers, and in one case we have granted rights for this account to the TempDB system database. However, whenever we restart this server SQL drops this user account, thus severing connectivity for the app that is relying on that account.
I have set the account as DB-Owner etc, but nothing sems to keep it on re-start.
Any input would be greatly appreciated.
We have a problem with the creation a tempdb on SQL Server 2005 startup
We lost the Q: drive in which tempdb had a datafile
We can't attach a Q: drive because we are using a cluster
When we boot up, here what we get:
tempdb..sysfiles:
fid filename
1 I:Microsoft SQL ServerMSSQL.3MSSQLDATA empdb.mdf
2 I:Microsoft SQL ServerMSSQL.3MSSQLDATA emplog.ldf
master..sysaltfiles
fid filename
1 I:Microsoft SQL ServerMSSQL.3MSSQLDATA empdb.mdf
2 I:Microsoft SQL ServerMSSQL.3MSSQLDATA emplog.ldf
3 P:MSSQLData empdb1.ndf
4 R:MSSQLData empdb2.ndf
5 S:MSSQLData empdb3.ndf
6 T:MSSQLData empdb4.ndf
7 P:MSSQLData empdb_1.ndf
8 P:MSSQLData empdb_11.ndf
9 P:MSSQLData mp1.ndf
10 R:MSSQLData mp2.ndf
11 P:MSSQLData emp1.ndf
12 Q:MSSQLData emp2.ndf
13 R:MSSQLData emp3.ndf
14 S:MSSQLData emp4.ndf
15 S:MSSQLData mp3.ndf
16 T:MSSQLData mp4.ndf
17 P:MSSQLData mp_1.ndf
18 R:MSSQLData mp_2.ndf
19 S:MSSQLData mp_3.ndf
20 T:MSSQLData mp_4.ndf
We've tried to use the 'allow update' option but it won't work. I can't remove lines from sysaltfiles.
We need tempdb to use 4 other devices for performance but it won't remember it's definition because it failed each time. Here the log entry:
CREATE FILE encountered operating system error 21(The device is not ready.) while attempting to open or create the physical file 'Q:MSSQLData emp2.ndf'.
Now I found information on how to resolve this on 2000:
http://groups.google.ca/group/microsoft.public.sqlserver.server/browse_thread/thread/eb365f82650d78d1/7c30472ae0a11448%237c30472ae0a11448
By using a trace flag but I don't see how I can use this on 2005 ! Can someone help me ?
We have installed SQL Server 2008 R2 SP1 instance and it's having Share Point 2010 databases.
We have 2 dedicated drives for Tempdb on SAN with 50 GB space. Both tempdb data & log files are created with default size. I would like to presize them.
What are the best values to start with?
U ->Tempdbdata having tempdb.mdf file
V->Tempdblog having templog.ldf file
how to know the limitation of number of objects(Maximum no.of objects allow tempdb database) in a tempdb database?
View 2 Replies View RelatedI have an instance with 4 datafiles for tempdb each set at initial size of 4G and growth rate of 100MB. After some time the initial file sizes seem to have changed automatically. They now read 3962,100,3688 and 2847 respectively. Is this something done by SQL Server itself? I cannot imagine that it was done manually.
I don't think there was a restart after the initial sizes of 4G were set, could this be related to the problem?
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.
I am asking about a virtual IP for SQL Server, is there a way we can assign a different IP to SQL Server other than the server's(host) IP address? like the same what we do in a clustered env.
View 3 Replies View RelatedI've recently started working with a public sector organisation who have 4 clustered sql instances that has 80% of it's db mirrored.
Looking at the transaction log - it seems that a transaction log backup is a good idea as the log is 4x larger than the data file.But I'm not allowed access to the physical server to check onto which drive I can create the trn. No RDP, no vmware - let's be honest I'm not even allowed to launch cmd line Also the Server Manager informs me "We will need to carefully look at database backups if you guys want to start doing these backups on box, as that will break our off box backup routine (it will screw the transaction chain)."
I don't understand how backing up the transaction log could break the "transaction chain"?
We are trying to create some alerts in our SQL Server 2014 BI edition.Issue is that, after I chose "Type" as "SQL Server performance condition alert" nothing is listed in the "Object" list box.SQL Server event alerts are working. Issue is only with "SQL Server performance condition alert".
View 3 Replies View RelatedI Run All checks for Validation cluster.I get Error On Disk Lists And Validation failed.With This error : Failed to prepare storage for testing on node "server name" The security account manager (SAM) or local security authority (LSA) server was in the wrong state to perform the security operation.
View 2 Replies View RelatedWe recently had a problem with DB Mail. SQL jobs that sends an email succeeded but the email in the job fail to sent. There was a problem with the email server. The error is included. We fixed the problem with the email server. How can I get an alert when a DB Mail email fails send?
Date4/23/2015 10:01:06 AM
LogDatabase Mail (Database Mail Log)
Log ID5907
Process ID13204
Mail Item ID5702
Last Modified4/23/2015 10:01:06 AM
Last Modified Bysa
Message
The mail could not be sent to the recipients because of the mail server failure. (Sending Mail using Account 1 (2015-04-23T10:01:06). Exception Message: Cannot send mails to mail server. (Insufficient system storage. The server response was: 4.3.1 Unable to accept message because the server is out of disk space.).
)