MOM Blocking Analysis
Oct 19, 2005
MOM contains its own Block Analysis script. It is a script written on
VB, that looks for the monitored servers, creates for each one
MomCreateObject("SQLDMO.SQLServer"), afterwards connects to each
database on each server and executes SELECT GETDATE() query. If MOM
doesn't receive answer for 6 minutes, it sends alert. Several times
since I started to monitor my servers I received the next alert:
The program "SQLDMO_789" has been blocked for 6 minutes on database
BurstingDataWarehouse in the SQL instance MSSQLSERVER. The defined
acceptable blocking threshold is 1 minute(s). "SQLDMO_789" is running
on SPID 134 as login NT AUTHORITYSYSTEM and is blocked by SPID 133.
The resource id is KEY: 10:2:1 (a2007950f190)
SQLDMO_789 - is the MOM itself (number varies from time to time). 10 -
is BurstingDataWarehouse database. As far as I can judge, MOM connects
to the server succesfully (otherwise, how can it know SPID?) The server
itself worked fine at that time - nothing unusual, all the jobs
finished succesfully including the heavy ones. What can block SELECT
GETDATE() query for 6 minutes???
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Feb 9, 2007
We have a report in Reporting Services that connects to a Cube. The report has 4 input parameters that are also derived from the same cube. If the report is running and another user tries to select the drop downs for the report or runs just the query portion in report designer, the query will not return until the report has finished. It looks like the report is creating some type of wait. Has anyone ran across something like this?
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Mar 5, 2015
I have, a SSAS 2012 tabular instance with SP2, there is a database on the instance with a read role with everyone assigned permissions. When configuring the Power BI analysis services connector, at the point where you enter Friendly Name, Description and Friendly error message, when you click next I receive the error "The remote server returned an error (403)." I've tested connecting to the database from Excel on a desktop and connect fine.I don't use a "onmicrosoft" account so don't have that problem to deal with.
We use Power BI Pro with our Office 365. As far as I can tell that part is working ok as I pass that stage of the configuration with a message saying connected to Power BI.The connector is installed on the same server as tabular services, its a Win2012 Standard server. The tabular instance is running a domain account that is the admin account for the instance (this is a dev environment) that account is what I've used in the connector configuration. It's also a local admin account. There is no gateway installed on the server.
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May 13, 2014
I have a cube that we are processing nightly via an Analysis Service Processing Task in SSIS. In order to increase the performance of the processing time, we elected to use a lot of rigid dimension attributes, and do a full process of everything in the SSIS task. The issue that I am having is that after that task completes, I need to go into Visual Studio to deploy the cube becuase we are unable to browse or use the cube. This issue seemed to start once we changed the SSIS Analysis Service Processing Task to do a full process on the dimensions, rather than an incremental.
I would expect that once development is done, and it is processed and deployed, that is it. My thinking is that the SSIS task should just update the already deployed cube,
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Jun 12, 2015
How to right choose key column in"Mining Structure" for Microsoft Analysis Services?
I have table:
"Incoming goods"
Create table Income (
ID int not null identity(1, 1)
[Date] datetime not null,
GoodID int not null,
PriceDeliver decimal(18, 2) not null,
PriceSalse decimal(18, 2) not null,
CONSTRAINT PK_ Income PRIMARY KEY CLUSTERED (ID),
CONSTRAINT FK_IncomeGood foreign key (GoodID) references dbo.Goods ( ID )
)
I'm trying to build a relationship(regression) between “Price Sale” from Good and “Price Deliver”.But I do not know what column better choose as “key column”: ID or GoodID ?
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Feb 18, 2013
It is possible to create Analysis Services project (*.dwproj) in Visual Studio 2012 Data Tools?
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Nov 24, 2015
I am using
SSAS: version 2008
Excel: version 2013
I am connecting to SSAS cube from Excel and I have date dimension with 4 fields (I have others but I don't use it for this case). I created 4 fields in order to test all possible scenarios that I could think of:
DateKey:
- Type: System.Integer
- Value: yyyyMMdd
Date:
- Type: System.DateTime
DateStr0:
- Type: System.String
- Value: dd/MM/yyyy (note: I am not using US culture)
- Example: 01/11/2015
DateStr1:
- Type: System.String
- Value: %d/%M/yyyy (note: I am not using US culture)
- Example: 1/11/2015
Filtering on date is working fine:
Initially, in excel, filtering on date was not working. But after changing dimensional type to time, and setting DataType to Date, as mentioned in [URL] filter is working fine as you can see in the picture.Grouping on date is not working:
I have hierarchy in my Date dimension and I can group based on hierarchy, no problem. But user is used to pre-build grouping function of excel, and he wants to use that. Pre-build functions of Excel, Group and ungroup seems to be available as you can see in following picture:
But when user clicks 'Group', excel groups it as if it is a string, and that is the problem. User wants to group using pre-build grouping function available in Pivot table. I also find out that Power Pivot Table does not support this excel grouping functionality. And if I understood well, this pre-build grouping functionality of excel, needs to do calculation at run time, and that is not viable solution if you have millions of rows. So Power pivot table does not support pre-build grouping functionality of excel and hence we need to use dimension hierarchy to do the grouping. But I am not using Power Pivot table, I am using simple Pivot Table. So I expect grouping functionality to be working fine. Then I tried to do simple test. I created a simple data source in excel itself. And use it as source of my Pivot table. Then grouping is working fine. The only difference that I can see is (When double click the Measure value in Excel),For date values of my simple test, excel consider them as 'Date'.
For date values of my data coming from cube, excel consider them as 'General'
2.1. But value here is same as it was in simple test.
2.2. 'Date Filter' works just fine.
2.3. If I just select this cell and unselect it, then excel change type to 'Date' though for that cell.
2.4. I have created 4 different types of fields in my date dimension thinking that values of attribute of my dimension might be the problem, but excel consider 'General' for all of them.
2.5 This value (that can be seen when double clicking on measure) comes from 'Name Column' of the attribute. And the DataType defined is WChar. And I thought that might be the reason of issue. And I changed it to 'Date'. But SSAS does not allow it to change to 'Date' giving error : The 'Date' data type is not allowed for the 'NameColumn' property; 'WChar' should be used.
So, I don't know, what is the puzzle piece that I am missing.
1. Date filter works, group does not work
2. Excel consider it as 'General' string.
3. SSAS does not allow to change 'NameColumn' to Date.
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May 30, 2015
I would like to know the best practice for running analysis service in terms of port usage. Is it better to run on a specific port or have dynamic ports ? We have clustered servers that run default on 2383 but not sure with non clustered what's the best way to get performance.
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Aug 6, 2015
I want to find out if it is possible to create a role in a cube without an AD account, e.g. using a GMail email address.
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Aug 15, 2000
One sql transaction is in rollback state and optimization job is trying to restructure index on the same table that this transaction is using. As a result,
transaction is in 'blocking' state and optimization job is in 'blocked' state. 'Kill process' doesn't do anything. How can this situation be resolved?
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Nov 26, 2001
Is it possible that blocking can occur between a select and update statements running at the same time on the same object??thanks for the reply!
Sheila.
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Nov 1, 2007
Anyone out there having "self blocking" issues since upgrading to SP4 on SQL 2000? Enabing trace flag 9059 has not helped, is this a parallelism issue ?
thanks,
Paul
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Jan 6, 2004
Any ideas?
I execute a sproc from QA.
It interogates a folder:
Select @Command_String = 'Dir ' + @FilePath + '*.txt'
Insert Into XLAT_Folder exec master..xp_cmdshell @Command_String
[/code[
Which I then Parse and get the details...
Set up a CURSOR (Booo hiss....)
[code]
DECLARE XLAT_Folder CURSOR FOR
SELECT Create_Time
, File_Size
, [File_Name]
FROM XLAT_Folder_Parsed
ORDER BY [File_Name]
WHILE FETCH STATUS = 0
BEGIN
BEGIN TRAN
Then, based on the methodology that the file name must match the table and format file (I check to make sure everything is out there)
I then bcp the data in using my connection pooling id (I'm logged on as sa in qa)
SET @cmd = 'bcp ' + @db_name + '..' + SUBSTRING(@File_Name,1,CHARINDEX('.',@File_Name)-1) + ' in '
+ @FilePathAndName
+ ' -f' + 'd:DataTax' + SUBSTRING(@File_Name,1,CHARINDEX('.',@File_Name)-1) + '.fmt'
+ ' -S' + @@servername + ' -U -P'
SET @Command_string = 'EXEC master..xp_cmdshell ''' + @cmd + '''' + ', NO_OUTPUT'
INSERT INTO #XLAT_BCP_Results(Col1) Exec(@Command_String)
MOVE DATA FILE TO ARCHIVE
COMMIT TRAN
ANOTHER FETCH
A spid is launched to do the bcp...I have 4 files...on the last load The connection Pooling lauched spid gets blocked by the sa spid that launched the sproc...it doesn't happen all the time, just most of the time....
I've put a trace on in Profiler, but I don't see anything...I've picked the event class of deadlocks...but I never see it...
When I do sp_who, it shows the blocking...
I'm so confused....
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Aug 31, 2006
Hi just read an article on the internet that states
"A quick way to resolve a blocking problem is to disconnect the connection blocking the rest of the users. All you have to do is ask your database administrator to execute the KILL statement. Obviously, this is not a permanent solution, and won't really help anything except take care of an immediate need."
Now when i run sp_who ... i see that the spid that is blocking is the same as the spid itself....
Now the above article states that killing the one that is blocking the rest of the other spids is ok ...
But what if its the same SPID that is blocking ...what does it signify & whats the solution
Thanks
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Nov 13, 2007
Hi Gurus,
I am running a simple SELECT statement on my TempDB
SELECT * FROM TempDB..SysObjects
When I run this , it's getting blocked by some other Process which is not at all relevant to the above Qry. First it gets blocked by one Stored Proc say Proc1 ( The Proc1 is just a SELECT statement on a table which just has four rows ). So I just kill this PROC1 and again its gets blocked by some other stored Proc PROC2 which again is a simple stored Proc and it runs in not time.
Any Suggestions as to where to start.
Thx in Advance
Venu
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Jul 23, 2005
hi,I am using SQL SERVER 2000.Problem that i am facing is when ever I check locks in EnterpriseManager I findfollowing blocking - :1) sp_cursoropen;12) sp_cursorclose;13) sp_cursorfetch;1We dont have any control over application(source code).Whateverwe have to do, has to done from database side.can anyone guide me to solve this problem.Thanks
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Dec 13, 2007
I have one batch jobs running 4 time a day and web application.
We have hosted the site long time already but this month we are facing the store procedure blocked problem.
The problem is that when user submit the form when during the execution of batch job, two storeprocedure are blocked.
One store procedure that is using from batch job read the table "A" and another store procedure that is using from web app update the table "A".
Then deadlock is occure. but i don't understand it is hosted long time already. Please let me know if you know how to solve this issue.
Thanks,
Aung
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Jan 14, 2002
Hi ALL!
Can a sleeping process block another process sleeping/runnable?It's happening in our SQL server.Can someone expalin??
thanks.
Di.
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Apr 24, 2002
I have a powerbuilder application that is connecting to SQL Server. We get very frequent DeadLock situations. Is there a way that I can check to see as what SQL is causing the Lock?
Thanks in advance for any suggestions...
-Raj
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May 29, 2001
I have upgraded a MS SQL database from 6.5 to 7.0. The database functioned fine in 6.5, now I have a table that is locking due to a blocking process. If I kill the process all is fine, but am trying to determine what is causing the process to hang. Has anyone experience any similar situations.
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Jul 10, 2001
Hello,
In the morning at 9:32 one of the spid was blocked and got time out msg for select statement. the statement was sp_execute wht is sp_execute?
can anyone guide me?
Thanks
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Jul 13, 2001
Hello,
I've a problems with blocking
simple select * from table1
is blocked
how to know which statement is blocking
select * from table1 is spid 30 blocked by spid 26
and in current activity spid 26 has no select or any statement
how could i know the spid 26 statement ?
And can just select statement be blocked?
wht should we do to monitor locks?
Thanks
Binoy
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Nov 15, 2000
I know that spid 22 is blocking 2 other users. How do I tell who that user is? Is this just matching the same spid# in the process info in EM and if it doesn't give me an NT name it's probably because they're coming through the application and I can't figure it out?
Thanks
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Feb 4, 2001
Hi there,
I've a encountering a problem with "Blocking" and would highly appreciatd, if anyone out there please advice how to get to the bottom of this. the problem in as follows:
Every now and then, my SQL Server Freezes and when i look at the process info, i see some user connections in blocked mode and some in blocking. i dont know, where to start looking for. my first question would be, what should I do here? Should i kill the blocked user or blocking user? Also, Whats the difference between this two modes (blocked and blocking) and why does this happening? can i trace the user id which is causing this problem?
Experts please advice, what to do in the near future to aviod this.
I search at microsoft support site and came up nothing good about this problem.
Appreciated, If anyone out there advice on this.
Many thanks in advance.
Sindi
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Apr 19, 2000
When an SA attempts to change permission on any object they are shown as blocked as expected. However as new users access the object the SA's process is continuely blocked until the object is free. Can anyone explain this??
Thanks
David
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Dec 7, 1999
Hello...
Is it normal in SQL Server 6.5 the user who only running the query blocking the other user who try to update/add the records?
note: The query is a complex SQL.
Many Thanks!
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Jun 2, 2005
found many blocking on SQL2000 enterprise by insert statement, the same insert statement failed in the sql/w with violation on the primary key.
however, the appl insert also got the same error from log, but still in 'blocking' instead of to be 'killed' by the pk violation.
what would be the options to deal with this issue?
thanks
-D
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Nov 17, 2005
Please advice.
I have a sql2K SP3 active/passive failover cluster running on W2K SP4. I epxerienced a blocking scenario. The blocking process was killed only to find another process cause blocking. Killing the blocking process didn't resolve the blocking issue.
Eventually I had to fail over the SQL Server instance to another node and that brought resove the blocking issue.
What direction should I look for investigation and solution.
URGENT PLEASE.
Help appreciated
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Aug 24, 2001
I have a vendor supplied database which seems to have a simple blocking problem. The blocking will occur when a user tries to delete from a table where another user might be inserting or selecting from. The table has only 3 columns and the delete statement looks fine. (they are not deleting the same record) This is on SQL 2000 sp1. has anyone seen this or have any ideas. The db is on a fast server (quad 2 gig of ram). I did have the thought on a problem I ran into with an older db on SQL 7 where the write-ahead RAID controller was actually causing a simlar problem. Any help appreciated
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Dec 8, 2006
Hi All,
I have a hypothetical scenario. I have few developers who all know the sa password. I want to block one developer from accessing the SQL server eventhough he knows the sa password.
Do we have any mechanism in SQL Server 2000 to block client based on the IP address of the client?
SQl Server is installed on Windows 2000 server. It uses SQL Server & Windows authentication.
Regards,
Anand
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Sep 4, 2007
I don't understand why a CREATE PROC from 3.5 hours ago is the head blocker. The SP wasn't changed since in months so this must be a compile/recompile? It's not a COMPILE lock though but a PAGE lock. It's certainly not the initial creation. What else can be done to debug this? It's happening and usually resolving itself in 4-6 hours or if I kill the head blocker myself. It doesn't happen every day but almost every day.
I've retrieved this info about the blocking from DMVStats and found similar info using my regular blocking info script also pulling info from DMV's.
I'm running SQL 2005 SP2 Enterprise.
statement started 6:35AM
waiting statement (PAGE lock):
insert into grades (blah,blah)
select blah blah from homework join blah blah
statement started at 3:01AM
blocking statement: =============================================
-- Author: <Author,,Name>
-- Create date: <Create Date,,>
-- Description: <Description,,>
-- =============================================
CREATE PROCEDURE [dbo].[ResultsHomeworkDelete]
@homeworkResultId int,
@NumDeleted int output
AS
delete homeworksessions where homeworkresult_id = @homeworkresultId
set @NumDeleted=@@ROWCOUNT
delete homeworkresults where homeworkresult_id=@homeworkresultId
set @NumDeleted=@NumDeleted + @@ROWCOUNT
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Sep 23, 2005
I'm wondering if I'm doing this right. Wondering about the transactionsand error handling. (Do I even need to put BEGIN TRANSACTION ANDCOMMIT TRANSACTION in there?)I think that this sproc is causing occasional blocking:Alter Procedure sprocINSERTSTUFF@Col1Data int = Null,@Col2Data nvarchar(255) = Null,@Col3Data ntext = Null,@UniqueID int OUTPUTASset nocount onset xact_abort onDECLARE @err intDECLARE @ServerDate DateTimeSELECT @ServerDate = GETUTCDATE()BEGIN TRANSACTIONINSERT INTOtblStuff (Col1, Col2, Col3, DateCreated, etc.)VALUES(@Col1Data, @Col2Data, @Col3Data, @ServerDate, etc.)SELECT @err = @@error IF @err <> 0 BEGIN ROLLBACK TRANSACTION RETURN@err ENDSELECT @UniqueID = SCOPE_IDENTITY()COMMIT TRANSACTIONBEGIN TRANSACTIONINSERT INTOtblMoreStuff (UniqueID, DateCreated, Col1, Col2, Col3)Values(@UniqueID, @ServerDate, @Col1Data, @Col2Data, 'Text Label: ' +isnull(Cast(@Col3Data AS nvarchar(4000)),'<none>')SELECT @err = @@error IF @err <> 0 BEGIN ROLLBACK TRANSACTION RETURN@err ENDCOMMIT TRANSACTIONSELECT @err = @@error IF @err <> 0 RETURN @err
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Jul 20, 2005
We have a situation that occurs every so often with blocking ofvarious databases on one server (Win200 SQL7). It appears to happen atrandom, so I'm assuming it originates from something a user does andnot a regularily run process.We've examined the data available to us and used the very helpfulblocking code on http://www.algonet.se/~sommar/sqlutil/aba_lockinfo.html(Thanks Erland).Were getting closer to finding the problem, but need some advice onwhat to look for.This is a bit of guesswork, but we suspect that we get into asituation where blocking takes places, and this then cascades to otherprocesses which then block others in turn. The original culprit thenfinishes, but the blocks continue as the newer processes are holdingsomething else up. A bit like dominoes. It seems to take a while tofree this up.The problem we have is determining the start of this process. Once weare made aware of blocking issues, we can find out who is doing what,but almost always get a different answer/user and think we're gettingto it a little late.Ideally, I want to log the blocking somewhere so I can examine thefiles when this occurs and can therefore establish a pattern etc...Any ideas or suggestions would be welcome.
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