Sql Server Service Blocking
Dec 22, 2005
Hello All
I have w2k enterprise sql server with 2k3 windows enterprise. 180 users connects and runs video editing system. user connection value of Sql server:General Statistics is about 1400.
I upgraded my hardware from 4X xeon 2.2ghz. server to 8XAMD opteron dual core CPUs server system.
after this upgrade, in the day time (I mean work hours), sql server service is hanging or blocking randomly. there is no lock,no cpu load. during this blocking period, I can connect to server via remote desktop, whne I checked the disks, I can read data from disk. There is no error or warning in the events before the blocking time. In this period I can not login but if a user has already logged in he/she can run some queries in the begining of the period, but after 2-3 minutes nobody can run any query.
Do you have any idea about the reason or any suggestion to trace?
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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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Oct 19, 2005
Hey guys,
I've recently noticed some strange behaviour with sql server 2000 spid's blocking themselves. The spid will appear to be blocked for short periods of time, and then the block will disappear. I'm not sure how this could occur. It started appearing around the same time as I applied SP4.
If anyone could provide any insight into this, it would be greatly appreciated.
Cheers,
-Kilka
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Mar 25, 2015
Queries against DMVs like sys.dm_XXX causing blocking in user databases? I have never read that querying DMVs has caused blocking in user databases but that question recently came up in my environment.
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May 1, 2015
We have a SQL Server 2008R2 system that has heavy usage to one specific table. I have tuned basically all I can as far as making sure SQL Statements are using good indexes. From time to time a group of folks will log into Mgt Studio and run SQL Statements like this, leave the query open and once in a while it will cause blocking to other SQL running our online system
The query is like this: select ID,* from tablename with (nolock) where ID like 'MSPRYy%'
The results come back within less than 1 second. However, they leave this window open which is what causes this to be a HEAD BLOCKER and blocks other SQL Statements from running.
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Sep 21, 2015
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?
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Aug 27, 2015
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...
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Jun 19, 2015
I have trying to access a 2nd SQL Server instances running on my WHS 2011 server from my Windows 8.1 Pro client.
The first SQL Server instance I installed is SQL Server 2014 Developer. This has been in place for many months and access from my client pc is not a problem. The Developer instance was installed using standard settings so uses TCP port 1433 and I have verified this by checking the firewall rules. This instance name is <SERVERNAME>
As I want to host a personal website on my server I installed SQL Server 2014 Express as a 2nd instance on my WHS 2011 box for website database purposes. After this installation both instances are accessible via Management Console on the WHS 2011 box.
The second instance is named as <SERVERNAME>SQLEXPRESS.
However, I am unable to access the SQLEXPRESS instance using Management Console on my client pc. I know it is a firewall issue as when I turn off the firewall on the WHS 2011 box I can connect successfully. The errors reported have resulted in my trying many things to resolve the problem but none have worked, e.g.
Use the default SQLEXPRESS instance to listen on all TCP ports (default installation option). I checked the necessary firewall rules were set up correctly and they were, i.e. UDP ANY and TCP ANY for the SQLEXPRESS sqlservr.exe file.
Change the default SQLEXPRESS instance to list on a specific TCP port, e.g. 19344
Create an ALIAS for the SQLEXPRESS installation
The instance is definitely set up for Remote Access and is not Hidden.
Are there any other firewall rules I need to apply?
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Mar 4, 2015
I see some time email say blocking took place and but it get resolved itself. how to find the history of batch/query which blocked another SPID?
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Sep 23, 2015
I was trying to create stored proc
[code="create procedure dbo.sp_table1
@idint
as
begin
updatetable1
setisarchived = 1,
[Code] ....
But the query was continuously blocking the query below
updatetable1
setisarchived = 1,
modtime = getdate()
whereid = @id
andisarchived = 0
I was not sure, why the create procedure statement is blocking the update statement.
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Nov 6, 2015
We have a hosted server with a website and sql server 2008 on.
The windows firewall is turned on for all networks / profiles and says its blocking incoming traffic.
I see a lot of login attempts in the windows logs where hackers are trying to connect to it. I can also access it via SSMS from multiple external ips.
Everywhere I've googled says that incoming traffic should be blocked by default by the firewall.
There are no obvious rules that allow SSMS access.
If I do a blocking rule on inbound rules for a single ip that does work, blocking it from that ip, but any other ip's can still connect.
In the firewall log file I can see the allowed connections on port 1433 etc. other than the dropped one from the test blocking rule.
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Aug 7, 2006
Any ideas how I can I block telnet connections to SQL Server ports ?
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Sep 11, 2007
The following question applies to SQL Server 8.0.2187 (2000 + SP4+916287/914384/898709/915065/915340):
We have now twice had an incident where the same SQL Server has stopped responding. The only workaround is to restart the SQL Service. After this occurs, the log is filled with the following messages:
2007-09-10 16:42:14.29 spid3 Process ID 197:320 owns resources that are blocking processes on Scheduler 1.
2007-09-10 16:42:14.31 spid3 Process ID 74:324 owns resources that are blocking processes on Scheduler 5.
We haven't been able to pinpoint a cause or reporduce the problem on a dev server. I've seen several posts about this issue online but not many answers. Does anyone have any advice on how to troubleshoot this issue?
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Oct 12, 2015
We are getting frequently blocking in Report server database.
Is it ok to change isolation level to RCSI for report server database?
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Feb 11, 2015
I have a sql snippet from a 3rd party application that will not complete its transaction. The SELECT statement executes but does not finish. Instead the statement just sits in AWAITING COMMAND for 1000 seconds then dies, thus killing the UPDATE statement that is supposed to follow.
The CROSS JOIN and CROSS APPLY seem suspect.
(
@p0 DATETIME,
@p1 INT,
@p2 INT,
@p3 NVARCHAR(4000),
@p4 INT,
[code]....
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Jul 12, 2007
I have an almost virgin install of SQLExpres running on a WIN2K Pro system.
Have been able to create and connect db to Access 2000 without problem.
Now I wish to extend to remote connections. Using Surface Area Configuration tool, I changed Remote Connections to Local and Remote.
Whenever this setting contains TCP/IP and I try to restart the service I receive the following errors:
System Log:
The SQL Server (SQLEXPRESS) service terminated with service-specific error 10013.
Application Log:
Server TCP provider failed to listen on [ 'any' <ipv4> 0]. Tcp port is already in use.
TDSSNIClient initialization failed with error 0x271d, status code 0xa.
TDSSNIClient initialization failed with error 0x271d, status code 0x1.
Could not start the network library because of an internal error in the network library. To determine the cause, review the errors immediately preceding this one in the error log.
SQL Server could not spawn FRunCM thread. Check the SQL Server error log and the Windows event logs for information about possible related problems.
If I change back to Local Connections Only or Local and Remote using named pipes only, the service starts up again without a problem.
After five days of investigating, researching, reinstalling and waiting I have to ask for help.
Any suggestions or leads?
Thank You in advance.
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May 18, 2007
Hello! I have the following problem. I developed CLR Stored Procedure "StartNotification" and deploy it on db. This sp calls external web service. Furthermore, this sp is called according with SQL Server Agent Job's schedule. On my PC SQL Server works under Local System account and this web service is called correctly (Executed as user: NT AUTHORITYSYSTEM). But on ther other server the following exception is raised during job running:
Date 17.04.2007 16:42:10
Log Job History (FailureNotificationJob)
Step ID 1
Server MSK-CDBPO-01
Job Name FailureNotificationJob
Step Name MainStep
Duration 00:00:00
Sql Severity 16
Sql Message ID 6522
Operator Emailed
Operator Net sent
Operator Paged
Retries Attempted 0
Message
Executed as user: CORPmssqlserver.
A .NET Framework error occurred during execution
of user defined routine or aggregate 'StartNotification':
System.Security.SecurityException: Request for the permission of type
'System.Net.WebPermission, System, Version=2.0.0.0, Culture=neutral,
PublicKeyToken=b77a5c561934e089' failed. System.Security.SecurityException:
at System.Security.CodeAccessSecurityEngine.Check(Object demand,
StackCrawlMark& stackMark, Boolean isPermSet)
at System.Security.CodeAccessPermission.Demand()
at System.Net. The step failed.
What is the reason of this behaviour? Unfortunately I do not have direct access to this server.
I have the following guesses:
1) CORPmssqlserver may have not enough permissions to call web service
2) Something wrong with SQL Server account's permissions
2) Something wrong with SQL Server Agent account's permissions
I will take the will for the deed. Thanks.
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Jul 30, 2007
Hi all,
I do understand that it is highly recomended to have aserprate user (perfered a domain user account) for each of the SQL Server service and SQL Agent service.
What is the reason behind that? (Someone told me to not run the service with an account that has a powerul privilegs! - I don't undrstanmd this point can you explain it please?)
What is the diffrent between: 1- Local System account 2 -Network Service account
Thanks in advanced!
CS4Ever
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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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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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