I have a table that every 30 minutes needs to be repopulated from
another table that is recreated from scratch just before.
What I did was this:
CREATE PROCEDURE BatchUpdProducts AS
begin transaction
delete products
insert into products
select * from productsTemp
commit transaction
GO
This takes about 30 seconds to run. I tried it doing it with a cursor,
row by row, but it took like 30 minutes to run instead. The problem
is with the fast approach is, once in a while I get a deadlock error
in different areas trying to access the products table. Using SQL
Server 2000 by the way.
Any ideas?
Is there a way to send out an email woth deadlock information (victim query, winner query, process id's and resources on which the deadlock occurred) as soon as a deadlock occurs in a database or at instance level?I currently has trace flag 1222 turned on. And also created an alert that send me an email whenever a deadlock occurs. but it just says that a deadlock occurred and I log into sql server error log and review the information.
In a high traffic environment, deadlocks eventually occur as number of data processes increase. How can deadlocks be avoided, minimized and resolved. Please kindly provide scenario examples and samples of T-SQL code. Thanks much.
Iam trying to bcp a table(residing on my prod server to my local machine from command prompt) .Actually the table iam trying to bcp has heavy updates and selects, from users (70 users). The users complain that system becomes slow.Is it got anything to do with my trying to bcp the mentioned table(table has 170,000 records).Also whenever i try to bcp this table, only after being chosen as the deadlock victim by Sql server,for 3 or 4 times that iam able to bcp the table.
Any help regarding this will be very much appreciated TIA kinnu
I am unable to control the granularity of locks in our queries. We are running queries through MTS and are getting deadlocks.
The batch includes two inserts and one select query - all are hitting on only one table. This table has a unique clustered and a unique nonclustered index as well as a primary key.
Within the batch, I have given a table hint to set transaction isolation level to READCOMMITTED, ROWLOCK for the insert statements, like this
INSERT INTO ib_price with (READCOMMITTED,ROWLOCK)........
and the same for the Select statement.
SELECT retail_price, price_status_id FROM ib_price with (READCOMMITTED,ROWLOCK)
When I run sp_lock on the spid, I get output indicating that SS7 is placing a IX lock on the table. I'm pretty sure this is a big contributor to the deadlock.
I get the deadlock when I try to run more than one client with similar insert parameters.
How can I control the granularity to just rowlocks?
I am getting deadlock running a stored procedure from two machines. Looking at the error log (generated using trace flag 1204 and 3605), it seems the deadlock is on a key. But what I fail to understand is how come sql server granted exclusive lock on the key to both connections. The grant list shows that lock with Mode X is granted to both connection.
Can anyone help me resolve deadlock with following text
Parallel Query worker thread Involved in deadlock.
I am particularly interested in resolving details of above mentioned line,as I started getting dead lock more frequently now and when I look into query involved blocking and victim I see nothing that can cause deadlock they are update insert and select statement which were fine for long and all of sudden started giving problem.
Thanks in advance, for any knowledge share my mail id scraval@hotmail.com
Hi, When many users run some stored procedures I 've got some deadlocks. How to avoid that? We run large stored procedures code which are using sometime the same table. What is the best way for using the transaction isolation level, fillfactor indexes, procedure cache configuration ...etc to avoid that.
In addition, I am using MTS and sometimes the Tempdb is also locked, is it a Microsoft bug (again) ?
We had a dead lock every night 9:00pm. I found out Server/Current Activity --Object Locks : The error log showing error 17824, severity:10, state 0 DNCC TRACEON 208, SPID 28 DBCCTRACEOFF 208, SPID 28 In current activity --object locks and reapetedly showing "tempdb.dbo.sysobjects/sysindexes/syscolumns" 28:sa.master.dbo /INSERT /SQL_servername (MS SQLEW)
Sorry for bombading the forum with all these questions, but i am relatively new to sql 2000.
I am getting dead lock on the following procedure.
important background information 1. this is a multi user web-based call centre application 2. this procedure loads up a new contact based on priority
I see no reason how a dead lock could occur. does any one have any idea. could it be something else that is locking up resource used by this procedure?
CREATE PROCEDURE topcat.getNewContactInfo ( @contact_id int ) AS BEGIN begin transaction
declare @id int
set @id = (SELECT TOP 1 _id FROM class_contact WHERE (status IS NULL OR status='New Contact' OR status = 'No Connect' OR status='callback') AND (checked_in IS NULL OR checked_in <> 1) AND (callback_date >= (getdate() + 1) OR callback_date IS NULL ) ORDER BY priority DESC)
UPDATE class_contact SET checked_in = 1 WHERE _id = @id SELECT TOP 1 * FROM class_contact WHERE _id = @id
commit END GO
wat i dont' get is that, this procedure only has one update statement, this is the only statement that could possibly hold a lock on another resource (i think) , i can't see how a dead lock can happen in this case since this procedure doesn't hold up 2 resources at a time.
Using SQL Server 2000 SP3a, I run the following in 2 query analizerwindows on the Northwind database, the second one always gets thedeadlock Msg 1205:Window 1:declare @cnt intselect @cnt = 5while @cnt > 0beginbegin transactionselect * from orders (updlock) where employeeid = 1update orders set employeeid = 1 where employeeid = 1waitfor delay '00:00:03'commitselect @cnt = @cnt -1endWindow 2:declare @cnt intselect @cnt = 5while @cnt > 0beginbegin transactionselect * from orders (updlock) where employeeid = 1 and customerid ='ERNSH'waitfor delay '00:00:02'commitselect @cnt = @cnt -1endThe query in the first window gets 123 rows and places update locks onthem, then updates them and commits. The query in the second windowgets a subset (about 5) of the results that window 1 gets also tryingto place update locks on the same rows. Shouldn't the query in window 2just wait for the transaction in window 1 to finish? why would itdeadlock?you can also get rid of the delay in the second window and it willdeadlock faster.thanks in advance.Eugene
Hi.create table joe(c1 integer not null, c2 integer not null)Two sessions:Session 1:BEGIN TRANinsert into joe (c1,c2) values (1,2)Session 2:BEGIN TRANinsert into joe (c1,c2) values (3,4)Session 1:select * from joeSession 2:select * from joeOne of the sessions gets a deadlock victim message.thanks,Joe
Here is the exception I am getting, any idea why this might be happening:
Exception: ThisMethod is done: let this go: Exception: Transaction (Process ID 74) was deadlocked on lock | communication buffer resources with another process and has been chosen as the deadlock victim. Rerun the transaction. Stack Trace: at
Hi, I need to trace deadlock, one of article was mentioning “QL Server Profiler's Create Trace Wizard to run the "Identify The Cause of a Deadlock" for SQL Server 7.0, is there any way I can do this in Sql Server 2000?
Hi Guys. I just want to ask some insights on SQL Server Deadlock and what is the best way to handle deadlock in asp.net? Or something like a Try... Catch.. statement to handle the error? Please advice. Thanks in advance.
I have set up an alert to detect when Page Deadlocks rise above 0. Overnight I have DTS packages populating SQL Server and various other jobs (Cognos Cube Builds etc.). My alert detected a Deadlock during the night but all of my processes completed fine. My problem/misunderstanding is that my alert is still popping up every 5 mins saying there is a Deadlock yet there is nothing running or no-one accessing SQL server and I cannot see any trace of the Deadlock in the Current Activity. Is this normal or is it a bug?
Hi, Can I use the Create Trace Wizard to trace the cause for a deadlock....I have created a new Trace , so in the couse of today if I encounter a deadlock will I know....how is this indicated....Please do let me know as I am using this for the first time.....
I have (amongst many) an overnight SQL stored procedure that occasionally takes over an hour to run compared to its usual 2 minutes. It does the same each night, as does everything around it. (N.B. The job truncates and reinserts data into a table.)
I'm just wondering if a user request during the day that reads the table perhaps leave the PID open and thus a lock open with it. Then, perhaps my SQL job comes along and waits for the lock to release before it performs the truncate.
Couple of questions: 1. Could this happen? 2. If so, is there a log anywhere to suggest that a deadlock situation arose and PID x was the loser?
Hi guys; i use a transaction that takes a long time to execute.(Different updates on different tables) I want to use in my transaction a TABLOCKX after each update in order to Lock the table within the Transaction (Until the transaction will finish). This will normaly force another transaction using the same tables within the first transaction to wait until the lock will release.
1- Because there is no time out set . Does the second transaction wait until the first transaction be commited even if it takes more long time.
I serveral triggers in a table that is accessed by mutilple users in the application I am writing. I have come across a deadlock issue and have tried to resolve the issue by breaking down the triggers into many much smaller trans with no success. In general terms, can some one suggest some technique I am missing that I can try to avoid this issue .
I have a small database and a smalll table ( Table ID=565577053,with two indexes on this table). when more than one user connected, I got the deadlock on the index KEY and PAGE lock. I setup index with "DisallowRowLock" and "DisallowPageLock" , seems kill the index KEY and PAGE lock problem, but I got this TAB lock situation instead as following:
How can I get rid of this deadlock without changing the application code(without using set the isolation level or NOLOCK hint). When I load more data, will this problem goes away? Any kind of help will be appreciate.
I've been diagnosing deadlocks for a last couple weeks at a client site and I understand the KEY: and TAB: locks issues. However, the client recently experienced a series of multi-branch deadlocks for which I can find no information. Attached is the deadlock text from the ERRORLOG. Any help would be much appreciated.
After executing an ODBC trace, I found something interesting...
This app uses SQL Server Authentication. Let's say the SQL Login is "USER1" and USER1 only belongs to PUBLIC.
All of the tables in the database are owned by USER1.
While logged into the database as USER1:
The user attempts an INSERT into TABLE_A without fully qualifying the object name.
The INSERT fails due to the fact that it would violate a unique index on TABLE_A.
SQL SERVER 2000 - Not fully qualified The error that is returned in SQL Server 2000 is: Server: Msg 2601, Level 14, State 3, Line 1 Cannot insert duplicate key row in object 'TABLE_A' with unique index 'TABLE_A_U1'. The statement has been terminated.
The connection used for the INSERT statement is then dropped and a subsequent UPDATE statement is allowed to execute.
SQL SERVER 2005 - Not fully qualified When the same insert, using the same credentials is attempted in SQL 2005, the error returned is:
Msg 2601, Level 14, State 1, Line 1 Cannot insert duplicate key row in object 'dbo.table_a' with unique index 'TABLE_A_U1'. The statement has been terminated.
The connection used for the INSERT statement is NOT dropped and a subsequent UPDATE statement is NOT allowed to execute because the previous connection does not release the lock.
Note that the returned error shows the object qualified with DBO as the owner of the object instead of USER1.
SQLSERVER 2005 - Fully Qualified If I run the same insert statement with the object qualified as USER1.TABLE_A the error returned is:
Msg 2601, Level 14, State 1, Line 1 Cannot insert duplicate key row in object 'user1.table_a' with unique index 'TABLE_A_U1'. The statement has been terminated.
Note that this time, the error message correctly qualified the name with USER1 as the table owner.
QUESTIONS Is this not a bug in SQL 2005?
Is it possible that the ODBC driver fails to drop the connection it was using for the INSERT, because it is trying to drop a connection to DBO.TABLE_A while the actual connection is to USER1.TABLE_A?
I've been running my simulations against our SQL Server 2005 database all day today and have been noticing a lot of deadlocking. Almost every transaction was deadlocking and retrying.
About an hour ago I started SQL Profiler and enabled trace flags using DBCC TRACEON(3605, 1204). However, even though Performance Monitor was indicating high Deadlocks/sec ratio I could not find any evidence of them in SQL Profiler or in SQL Server error log. I restarted my simulations several times, but nothing changed.
So, then a miracle happened and the last time I started my simulations all deadlocks disappeared. I did not change any queries and I am puzzled as to what could have happened. The only things I did were starting SQL Profiler and executing DBCC TRACEON commands.
Since queries and transactions did not change, could it be that they started executing (and hence releasing locks) faster because of lower network traffic at the end of the day or because the transaction log was written to disk? Could it be anything that SQL Server 2005 does to optimize its own performance? What else could have caused such a drastic change?
I received the following error message when run the query,
Server: Msg 1205, Level 13, State 61, Line 1 Transaction (Process ID 61) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction.
