We are running a Windows NT Terminal server 4.0 with SQL 7. The application we are using has two main connections to the database that may at times update the same table simultaneously. On two seperate occasions we have run into a lock that causes these processes to hang. They appear to still be running in the Task Manager, but have no CPU time. When we review the current activity on the SQL server under Object/locks one of the items listed is "tempdb.dbo.##lockinfo13(the spid)". The last TSQL command batch is "dbcc inputbuffer(13). We have tried to research what this dbcc inputbuffer does, and why there is a conflic here... but have come up empty. Can you help with any information on this dbcc?
if the inputbuffer contains more than 256 chars, it only reports out the first 256 characters of the buffer. that's because EventInfo is defined as a nvarchar(256) field.
is there any way to get the full inputbuffer...even if it's more than 256 chars? i'm trying to run this:
Does anyone know if there is an equivalent way to get to the information that DBCC Inputbuffer returns using 2005s dynamic management objects? sys.dm_exec_requests only returns information that is currently executing...as DBCC inptubuffer returns the last statement executed for a session.
Does anyone know if there is a simple way to get the results of a DBCCINPUTBUFFER() request into a table? I have a process for monitoringactivity that will give me the results of sp_who2 into a temp table,and want to scroll through the active connections and get the inputbuffers into another table for review:Insert into #TmpWhoexec sp_who2 'active'Something like that with the dbcc command.I am using SQL 2000 SP4.Thanks,Tom
Guys, I need to send a group of people a list of specific processes running on the server, one of the requirements is to send them what's actually being ran on the machine. I have the information I was on the sysprocess tabke and the results of the DBCC Inputbuffer. Is there a way to link both result sets?
This is the criteria of the processes that neeed to be sent out to my users:
SELECT * FROM master.dbo.sysprocesses p WHERE last_batch < DATEADD(mi, -5, GETDATE()) AND dbo.fncGetNumLocks(p.spid, DB_ID('EngDataMart')) > 1 GROUP BY p.spid, p.loginame, p.hostname, dbo.fncGetNumLocks(p.spid, db_id('DBName')) ORDER BY p.spid
Error: The Script returned a failure result. Task SCR REIL Data failed
OnError - Task SQL Insert Error Msg Error: A deadlock was detected while trying to lock variable "System::ErrorCode, System::ErrorDescription, System::ExecutionInstanceGUID, System::StartTime, User::FEED_ID, User::t_ProcessedFiles" for read access. A lock could not be acquired after 16 attempts and timed out. Error: The expression ""EXEC [dbo].[us_sp_Insert_STG_FEED_EVENT_LOG] @FEED_ID= " + (DT_WSTR,10) @[User::FEED_ID] + ", @FEED_EVENT_LOG_TYPE_ID = 3, @STARTED_ON = '"+(DT_WSTR,30)@[System::StartTime] +"', @ENDED_ON = NULL, @message = 'Package failed. ErrorCode: "+(DT_WSTR,10)@[System::ErrorCode]+" ErrorMsg: "+@[System::ErrorDescription]+"', @FILES_PROCESSED = '" + @[User::t_ProcessedFiles] + "', @PKG_EXECUTION_ID = '" + @[System::ExecutionInstanceGUID] + "'"" on property "SqlStatementSource" cannot be evaluated. Modify the expression to be valid.
Warning: The Execution method succeeded, but the number of errors raised (4) reached the maximum allowed (1); resulting in failure. This occurs when the number of errors reaches the number specified in MaximumErrorCount. Change the MaximumErrorCount or fix the errors.
And how did I get 4 errors? - I only set my script task result to failure
Here's a quick script that will return the inputbuffer of processes that are holding more than a certain threshold of locks (by default, 10, but it's easy to modify). Handy for tracking down what query is holding those 1400 locks.
Yes, it uses a cursor. I'd welcome amendment by anyone who has the insight on converting it to pure set-based.
Cheers -b
CREATE PROCEDURE sp_lock4 AS set nocount on
DECLARE @tSpids table(spid int PRIMARY KEY CLUSTERED,count int) DECLARE @iSpid int,@iCount int
insert into @tSpids (spid,count) select convert (smallint, req_spid) As spid, count(*) as count
from master.dbo.syslockinfo, master.dbo.spt_values v, master.dbo.spt_values x, master.dbo.spt_values u
where master.dbo.syslockinfo.rsc_type = v.number and v.type = 'LR' and master.dbo.syslockinfo.req_status = x.number and x.type = 'LS' and master.dbo.syslockinfo.req_mode + 1 = u.number and u.type = 'L' group by converT(smallint,req_spid),'dbcc inputbuffer(' + cast(req_spid as varchar(4)) + ')' having count(*)>10 order by count(*) desc
DECLARE cLoop cursor for select spid,count from @tSpids
OPEN cLoop
FETCH NEXT FROM cLoop INTO @iSpid,@iCount WHILE @@FETCH_STATUS=0 BEGIN select 'spid ' + cast(@iSpid as varchar(4)) + ' has ' + cast(@iCount as varchar(5)) + ' locks.' exec ("dbcc inputbuffer (" + @ispid + ")") FETCH NEXT FROM cLoop INTO @iSpid,@iCount END
Hi We are facing an acute situation in our web-application. Technology is ASP.NEt/VB.NET, SQL Server 2000.
Consider a scenario in which User 1 is clicking on a button which calls a SQL stored procedure. This procedure selects Group A of records of Database Page1.
At the same time if User 2 also clicks the same button which calls same SQL stored procedure. This procedure selects Group B of records of Database Page1.
So, its the same Page1 but different sets of records. At this moment, both the calls have shared locked on the Page1 inside the procedure.
Now, in call 1, inside the procedure after selecting Group A of records, the next statement is and update to those records. As soon as update statement executes, SQL Server throws a deadlock exception as follows :
Transaction (Process ID 78) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction
We are able to understand why its happening. Its because, Group A and Group B of records are on the same Page1. But both the users have shared lock on the Page1. So, no one gets the exclusive lock in records for update, even though, the records are different.
How can I resolve this issue? How can I get lock on wanted rows instead of entire page?
I am playing with DBCC command to check the contsrainst on a perticular table (DBCC CHECKCONSTRAINTS ('myTable') WITH ALL_CONSTRAINTS), it always gives the following result:
DBCC execution completed. If DBCC printed error messages, contact your system administrator.
Hi, I have set of 2 DTS packages, one of which calls the other by forming a command-line (dtexec) using a Execute Process task.
From the parent package-> Execute Process Task-> dtsexec /F etc... /<pkg variable> = "servername"
Each of the parent and the called package have a variable: "User::DWServerSQLInstance" which is mapped to the SQL server connection manager server name property using an expression. The outer package has the above variable and so does the inner called package (which gets assigned through the command line from the outerpackage call to inner)
I "sometimes" get the following error:
OnError,I4,TESTDOMAdministrator,ACDWAggregation,{A1F8E43F-15F1-4685-8C18-6866AB31E62B},{77B2F3C7-6756-46EB-8C01-D880598FB4B3},5/22/2006 5:10:28 PM,5/22/2006 5:10:28 PM,-1073659822,0x,The variable "User::DWServerSQLInstance" is already on the read list. A variable may only be added once to either the read lock list or the write lock list.
Help would be appreciated!
I have seen other posts on this but, not able to relate the solution to my scenario.
I followed the advice of Paul Randal, but Im stumped as I am not able to determin what the corruption issues are. This is SQL 2000 and the database is a Solomon database that was recently upgraded to 6.5. the error I get when running the DBCC checkdb is as follows:
Server: Msg 8966, Level 16, State 1, Line 1 Could not read and latch page (1:18645) with latch type SH. sysindexes failed. DBCC execution completed. If DBCC printed error messages, contact your system administrator.
DBCC execution completed. If DBCC printed error messages, contact your system administrator. DBCC execution completed. If DBCC printed error messages, contact your system administrator.
Now, the bad news. I am a bit of a novice and have picked this up from someone who left my company. It appears the latch error has been around for some time and only reared up when I instituted a new back up system that runs a dbcc check befor backing up. I don't think I have any clean backups.
Package works fine when run from BIDS, DTExec, dtexecui. When I schedule it, It get these random errors. (See below)
The main culprit is a variable called "RecordsetFileDIR" which is set using an expression. (@[User::_ROOT] + "RecordSets\")
A number of other variables use this as part of their expression and as they all fail, pretty much everything dies.
I have installed SP1 (Not Beta) on server. Package uses config files to set the value of _ROOT.
The error does not always seem to be with this particular variable though. Always a variable that uses an expression but errors are random. Also, It will run 3 out of 10 times without a problem. I am the only person on the server at the time.
Any ideas?
Cheers,
Crispin
Error log:
OnError,,,POSBasketImport,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1073659822,0x,The variable "User::RecordsetFileDIR" is already on the read list. A variable may only be added once to either the read lock list or the write lock list.
OnError,,,POSBasketImport,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1073639420,0x,The expression for variable "rsHeaderFile" failed evaluation. There was an error in the expression.
OnError,,,DF_Header_Header,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1071636247,0x,Accessing variable "User::rsHeaderFile" failed with error code 0xC00470EA.
OnError,,,Move All Data,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1071636247,0x,Accessing variable "User::rsHeaderFile" failed with error code 0xC00470EA.
OnError,,,Load Open Batches and Process Files,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1071636247,0x,Accessing variable "User::rsHeaderFile" failed with error code 0xC00470EA.
OnError,,,POSBasketImport,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1071636247,0x,Accessing variable "User::rsHeaderFile" failed with error code 0xC00470EA.
OnError,,,DF_Header_Header,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1071636390,0x,The file name is not properly specified. Supply the path and name to the raw file either directly in the FileName property or by specifying a variable in the FileNameVariable property.
OnError,,,Move All Data,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1071636390,0x,The file name is not properly specified. Supply the path and name to the raw file either directly in the FileName property or by specifying a variable in the FileNameVariable property.
OnError,,,Load Open Batches and Process Files,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1071636390,0x,The file name is not properly specified. Supply the path and name to the raw file either directly in the FileName property or by specifying a variable in the FileNameVariable property.
OnError,,,POSBasketImport,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1071636390,0x,The file name is not properly specified. Supply the path and name to the raw file either directly in the FileName property or by specifying a variable in the FileNameVariable property.
OnError,,,DF_Header_Header,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1073450901,0x,"component "rsHeader" (365)" failed validation and returned validation status "VS_ISBROKEN".
OnError,,,Move All Data,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1073450901,0x,"component "rsHeader" (365)" failed validation and returned validation status "VS_ISBROKEN".
OnError,,,Load Open Batches and Process Files,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1073450901,0x,"component "rsHeader" (365)" failed validation and returned validation status "VS_ISBROKEN".
OnError,,,POSBasketImport,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1073450901,0x,"component "rsHeader" (365)" failed validation and returned validation status "VS_ISBROKEN".
I want to lock a table so others cannot lock it but able to read it inside transactions.
The coding I need is something like this: set implicit_transactions on begin transaction select * from table1 with (tablock, holdlock) update table2 set field1 = 'test' commit transaction commit transaction
I have tried the coding above, it won't prevent others from locking table1.
So, I changed the tablock to tablockx to prevent others from locking table1. But this will also prevent others from reading table1. So, how can I lock table1 so others cannot lock it but still able to read it?
Hello everyone,I have a web project where users access a aspx page to view information stored in an SQL database.My client want that one user can access a row of information and see it, all other users shouldn't be able to view or update the same row?it means whenever a row of data is displayed by some user, this row should be locked even for beeing viewed by all other users, when this user close this page, this row will be available. ?I should do this in code behind or something in sql...How can I do that???
An application we are designing is behaving rather strangely. Basically, we have a trigger on SQL 2000 on W2K Server watching for a record update. When that happens a stored procedure gets executed which in turn spawns a VB that extracts that record, applies some rules to it, and writes a text file to disk. 9 out of 10 times, this program will cause a CPU spin, and it can't be killed from the Task Manager.
I did not write the VB app, I am writing the front end for the application in ColdFusion, but I need some ideas on what might be causing such behavior and how can the problem can be diagnosed. Thanks for any help!
Is it good practice to use WITH (NO LOCK) on SELECT statements, ie SELECT * FROM MyTable WITH(NO LOCK) Or does the SQL Server optimiser automatically use WITH (NO LOCK) ?
Hi, i have a big problem , i work with sql 2000 on windows 2000. When user do a select against my database sqlserver lock all the table and nonoe can work. Haw can i change the isolation level for a ropw and for all the db. Thanks.
Wondering if anyone might have a guess about this.
I have a small 4 table DB. it's got several stored proc's and it's accessed through .NET to fill it in and get data from it.
It's been working just fine. But this morning, while it was doing its thing, I experimented with it by adding then deleting a View (through the View Wizard.)
Then later I started noticing that my .Net calls had slowed to a crawl (I hadn't made any code changes)and even making direct queries through Query Analyzer had slowed too.
My question is: being that there were no network issues, could the View create/delete have caused the DB to come to a halt or perhaps a table lock-up?
While I'm at it, is there anything that I can put in stored proc's or other places to prevent locking issues (if that's what happened here.)
I already use Begin/Commit Tran pairs.
And sorry if this post doesn't read like a SQL beginner, but believe me, I am.
I'm working with SQL Server Express, and I want to configure a named instance so that only the 'sa' user and a specified SQL Server user with a specified password have access. In particular, I'm trying to lock out BUILTINAdministrators. Furthermore, I need to be able to do this from a command-line, since I want to configure it in a script. Nothing I do seems to work.
I've attempted to use sqlcmd and the T-SQL call ALTER LOGIN [BUILTINAdministrators] DISABLE, but that returns the error "Cannot alter the login 'BUILTINAdministrators' because it does not exist or you do not have permission."
What I can (apparently) successfully do is run DENY CONTROL TO [BUILTINAdministrators]. This runs without reporting an error. However, after running it against the 'master' database and the specific database in my named instance I care about, I can still run the following:
sqlcmd -S (local)MyInstance -d MyDB -Q "select * from my_table"
and see the contents of my_table.
What do I need to do to restrict access exclusively to 'sa' and other SQL users I designate?
Hello. I need to insert some records to an accounting table and calculate the balance after that. Thus, other users can be trying to do the same. How to lock the db and make the other users wait until the right moment? I'm using SqlDataSource to do that. Thanks.
hi all iam working on a ticketing application i want to avoid two users to book the same ticket the requirement is as follows 1. the system should show all the available tickets which is not yet booked 2.when two users book the ticket at the same time time it should not allow the two persons to update at the same tme the main aim is to avoid data concurency how can i get this done
Hi,all: This problem almost drives me crazy, hope I can get some hints from you guyz!!! Ok, here is the situation: I wanna only one users 2 modify the data(update) from my page each time, and if at the same time, there are some other users connecting my database through .aspx page, they can only browse the data until the first users finish updating. It seems I need to implement locking the database, but I am not sure how I am gonna do that using asp.net!!! Thanx in advance!
hi, i have an application that updates some records in sql tables, and i want to do a web application that updates records in the some database-table(sql) so, my question is how can i lock the row or table so i dont have concurrency problems.tnx in advance.
I have a process that is running on a windows service that feeds a web applications database. While the windows service is processing the data the web application can't get to the data, this causes a minute or two delay, no so bad if it didn't happen every two minutes. What I am wondering is if I can set something on the ado.net transaction object that might get me around this problem. I don't know if i want a dirty read, because that would cause the web app to have exceptions. Any tips around this would be great. Thanks in advance
