Please start any new threads on our new site at http://forums.sqlteam.com. We've got lots of great SQL Server experts to answer whatever question you can come up with.

Our new SQL Server Forums are live! Come on over! We've restricted the ability to create new threads on these forums.

SQL Server Forums
Profile | Active Topics | Members | Search | Forum FAQ
 
Register Now and get your question answered!
Username:
Password:
Save Password
Forgot your Password?

 All Forums
 SQL Server 2008 Forums
 SQL Server Administration (2008)
 Profiler Deadlock Graph - What to do?
 Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

ferrethouse
Constraint Violating Yak Guru

352 Posts

Posted - 09/20/2012 :  16:45:09  Show Profile  Reply with Quote
I seem to be doing a fairly simple insert into one of our tables. In my load tests (10 concurrent users) I'm getting 75% deadlocks on what appears to be an index on the table. I don't know how to improve the code and the insert seems very simple. There is a trigger on the table but when I disable the trigger the deadlocks still happen. Not sure how to proceed...


Deadlock graph					<deadlock-list>
 <deadlock victim="process1b2d9f288">
  <process-list>
   <process id="process1b2d9f288" taskpriority="0" logused="4960" waitresource="KEY: 9:72057594795655168 (ffffffffffff)" waittime="804" ownerId="23117561" transactionguid="0xae1197df815c1e46b746994eb51787f0" transactionname="user_transaction" lasttranstarted="2012-09-20T14:35:59.433" XDES="0x803f5950" lockMode="RangeI-N" schedulerid="1" kpid="3624" status="suspended" spid="92" sbid="2" ecid="0" priority="0" trancount="2" lastbatchstarted="2012-09-20T14:35:59.850" lastbatchcompleted="2012-09-20T14:35:59.850" clientapp=".Net SqlClient Data Provider" hostname="WEB01" hostpid="6220" loginname="Blatant" isolationlevel="serializable (4)" xactid="23117561" currentdb="9" lockTimeout="4294967295" clientoption1="671088672" clientoption2="128056">
    <executionStack>
     <frame procname="adhoc" line="1" stmtstart="204" stmtend="664" sqlhandle="0x020000008d05c4060864c7b109b4f20dcab717dad8db4558">
INSERT INTO [dbo].[LearningPathSubscription]([StudentsID], [LearningPathID], [Status], [Progress], [AutomaticAssignment], [DateAdded], [Completed], [ReferenceNum], [BulkID])
VALUES (@p0, @p1, @p2, @p3, @p4, @p5, @p6, @p7, @p8)     </frame>
     <frame procname="unknown" line="1" sqlhandle="0x000000000000000000000000000000000000000000000000">
unknown     </frame>
    </executionStack>
    <inputbuf>
(@p0 int,@p1 int,@p2 int,@p3 decimal(7,4),@p4 int,@p5 datetime,@p6 datetime,@p7 varchar(8000),@p8 int)INSERT INTO [dbo].[LearningPathSubscription]([StudentsID], [LearningPathID], [Status], [Progress], [AutomaticAssignment], [DateAdded], [Completed], [ReferenceNum], [BulkID])
VALUES (@p0, @p1, @p2, @p3, @p4, @p5, @p6, @p7, @p8)

SELECT CONVERT(Int,SCOPE_IDENTITY()) AS [value]    </inputbuf>
   </process>
   <process id="process1b423f708" taskpriority="0" logused="5612" waitresource="KEY: 9:72057594795655168 (ffffffffffff)" waittime="803" ownerId="23117603" transactionguid="0x4efdd569afad41409939296f63662005" transactionname="user_transaction" lasttranstarted="2012-09-20T14:35:59.543" XDES="0x196d12e80" lockMode="RangeI-N" schedulerid="2" kpid="2052" status="suspended" spid="79" sbid="2" ecid="0" priority="0" trancount="2" lastbatchstarted="2012-09-20T14:35:59.850" lastbatchcompleted="2012-09-20T14:35:59.850" clientapp=".Net SqlClient Data Provider" hostname="WEB01" hostpid="6220" loginname="Blatant" isolationlevel="serializable (4)" xactid="23117603" currentdb="9" lockTimeout="4294967295" clientoption1="671088672" clientoption2="128056">
    <executionStack>
     <frame procname="adhoc" line="1" stmtstart="204" stmtend="664" sqlhandle="0x020000008d05c4060864c7b109b4f20dcab717dad8db4558">
INSERT INTO [dbo].[LearningPathSubscription]([StudentsID], [LearningPathID], [Status], [Progress], [AutomaticAssignment], [DateAdded], [Completed], [ReferenceNum], [BulkID])
VALUES (@p0, @p1, @p2, @p3, @p4, @p5, @p6, @p7, @p8)     </frame>
     <frame procname="unknown" line="1" sqlhandle="0x000000000000000000000000000000000000000000000000">
unknown     </frame>
    </executionStack>
    <inputbuf>
(@p0 int,@p1 int,@p2 int,@p3 decimal(7,4),@p4 int,@p5 datetime,@p6 datetime,@p7 varchar(8000),@p8 int)INSERT INTO [dbo].[LearningPathSubscription]([StudentsID], [LearningPathID], [Status], [Progress], [AutomaticAssignment], [DateAdded], [Completed], [ReferenceNum], [BulkID])
VALUES (@p0, @p1, @p2, @p3, @p4, @p5, @p6, @p7, @p8)

SELECT CONVERT(Int,SCOPE_IDENTITY()) AS [value]    </inputbuf>
   </process>
  </process-list>
  <resource-list>
   <keylock hobtid="72057594795655168" dbid="9" objectname="absorb.dbo.LearningPathSubscription" indexname="_dta_index_LearningPathSubscription_5_861962147__K2_K1_K3" id="lockfd836f80" mode="RangeS-S" associatedObjectId="72057594795655168">
    <owner-list>
     <owner id="process1b423f708" mode="RangeS-S"/>
    </owner-list>
    <waiter-list>
     <waiter id="process1b2d9f288" mode="RangeI-N" requestType="convert"/>
    </waiter-list>
   </keylock>
   <keylock hobtid="72057594795655168" dbid="9" objectname="absorb.dbo.LearningPathSubscription" indexname="_dta_index_LearningPathSubscription_5_861962147__K2_K1_K3" id="lockfd836f80" mode="RangeS-S" associatedObjectId="72057594795655168">
    <owner-list>
     <owner id="process1b2d9f288" mode="RangeS-S"/>
    </owner-list>
    <waiter-list>
     <waiter id="process1b423f708" mode="RangeI-N" requestType="convert"/>
    </waiter-list>
   </keylock>
  </resource-list>
 </deadlock>
</deadlock-list>
					sa			31	2012-09-20 14:36:00.653				

chadmat
The Chadinator

USA
1974 Posts

Posted - 09/21/2012 :  12:38:00  Show Profile  Visit chadmat's Homepage  Reply with Quote
What is the table definition, and what indexes exist?

-Chad
Go to Top of Page

ferrethouse
Constraint Violating Yak Guru

352 Posts

Posted - 09/25/2012 :  16:35:40  Show Profile  Reply with Quote
It turns out the was a transaction running associated with a LINQ query that wasn't obvious.
Go to Top of Page
  Previous Topic Topic Next Topic  
 Reply to Topic
 Printer Friendly
Jump To:
SQL Server Forums © 2000-2009 SQLTeam Publishing, LLC Go To Top Of Page
This page was generated in 0.09 seconds. Powered By: Snitz Forums 2000