Blocking

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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Blocking

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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Blocking

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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Self Blocking SP4

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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Blocking When Doing Bcp

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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Blocking

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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Blocking

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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Sql Blocking Problem

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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Blocking URGENT!!

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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SQL Server 7 Blocking

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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Blocking Processes

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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Blocking (Urgent)

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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Blocking (Urgent)

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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Spid - Blocking

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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Blocking Problem.

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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Blocking Problem

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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Blocked/Blocking

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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Insert Blocking...

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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Blocking Issue

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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Blocking Problem

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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Blocking Sa User

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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Odd Blocking Issue

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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Blocking And Transactions OK?

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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MOM Blocking Analysis

Oct 19, 2005

MOM contains its own Block Analysis script. It is a script written onVB, that looks for the monitored servers, creates for each oneMomCreateObject("SQLDMO.SQLServer"), afterwards connects to eachdatabase on each server and executes SELECT GETDATE() query. If MOMdoesn't receive answer for 6 minutes, it sends alert. Several timessince I started to monitor my servers I received the next alert:The program "SQLDMO_789" has been blocked for 6 minutes on databaseBurstingDataWarehouse in the SQL instance MSSQLSERVER. The definedacceptable blocking threshold is 1 minute(s). "SQLDMO_789" is runningon 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 connectsto the server succesfully (otherwise, how can it know SPID?) The serveritself worked fine at that time - nothing unusual, all the jobsfinished succesfully including the heavy ones. What can block SELECTGETDATE() query for 6 minutes???

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Cascading Blocking ?

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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Blocking Problem

Jul 20, 2005

SQL2K, sp3Active Server Pages front-endI am having a blocking problem with a spid executing a storedprocedure that does no updates. When I look at the locks the blockingspid has, some of them have lock mode "IS". Looking in BOL, I see "S"is shared, but I don't see "IS". Can anyone tell me what lock mode"IS" is?And how could a stored procedure that does no updates be guilty ofblocking?There are no cursors in it.Thanks!

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Blocking Transaction

Mar 29, 2006

I have a 3 simple packages get called from master package. First package populates time dimension (stored proc), second one populates transaction type dimension(stored proc) and the final one populates date dimension.

I set the TransactionOption = Required in the Master package, every thing else (package & component) set TransactionOption = Supported.

I have been testing transactions, basically I made time and transaction type dimension to fail and the package did roll back. I am stuck in the date dimension.

Within Date dimension I got a stored procedure which populates calendar date attributes into Wrk_Date table. Then I have a data flow task which reads from thats working table, but it cant access it. I tried running SP_WHO2 command, and the status is SUSPENDED, being blocked by id -2.

I saw someone had similar problem and I did read Ash's comments. I did try to change the isolation level, didnt help.
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=74372&SiteID=1

Any thoughts please?

Thanks

Sutha

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Multiuser & Record Blocking

Jul 14, 2000

How to block record which is accessed by one user ? I mean how to make this record unavailable to other users ? Please help !

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Blocking Problems. URGENT!!

Nov 27, 2001

A select query in one of the stored procedures is always blocking another update query.Both run more than 100 times a day.Any idea on how to get rid of blocking problems involving these two.
Thanks!
Sheila

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Revisiting Deadlocks And Blocking

Jul 12, 2004

ok, about a few months ago I brought up the issues we were having with deadlocks. My company is running a .net data entry application hitting against a sql 2000 box. Forget hardware since we have more then enough hardware to handle the load.

The issue we are seeing is we get a process that blocks a table, and the bulding up of block process that cause timeouts/deadlocks etc. A couple of things we see when this happens is that .net on the web server seems to open up more and more connections(it seems to double or triple the connections as the blocking begins), we start to see deadlocks and we see alot of timeouts in the app due to the blocking.

The blocking aways happen on an insert of an order or a customer. One thing I keep wondering about is how we handle the unique id for our tables. Our DBA had us put in the following:

Begin Trans
select max(id) + 1
insert....
commit trans

I've heard from a few here and in other forums this is the wrong way to go. I'm still get a gut feeling that this could start causing issues like what we are seeing. My problem is I'm not knowledgable enough to make a strong enough case with it.

What I need help is getting enough information to either point to how we manage ID's or at the very least rule them out. I've done searchs in google and some other search engines but there doesnt seem to be any good articles on how best to handle unique ids and show a good case for it. I do know I can use sql identity, or even guid with the newid() function but I need solid proof before my boss will move to one of these methods. Any links you guys can give or even your own write up will really help my case and hopefully help my headache.

Thanks Ahead of time

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Jun 15, 2007

I'm trying to run DBCC Showcontig on a table and when I run this It ends up blocking itself all the time. What would cause this and what fixes it?

thanks.

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Alert To Find Blocking

Jul 17, 2002

I need to set up an alert to for when blocking happens. What condition do I use. I can't find the one that correlates to blocking.

Please help.

Much appraciated,
K

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Blocking Repicated Deletes

Oct 19, 2004

Hi

I keep data in four seperate locations, each with different data retention.
the problem is, i keep the publisher "thin" - only 24 hrs of data) the data in the relevant tables is about 250000 a day) and these deletes are blocked at the subscribers by commenting out the body of the repl proc.
this does however cause a burst in bandwith & locks the subscribers, even though no actual delete takes place.
does anyone know if you can actuaklly NOT REPLICATE delete commands for specified tables at all - so that the message of the delete wont even be SENT to the subscriber?

Des

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