?
Solved

Dead Locks in SQL Server

Posted on 2013-01-02
5
Medium Priority
?
414 Views
Last Modified: 2013-01-11
Hi,
Please help me to resolve this issue.

We are using SQLSentry tool to monitor our DB server. We got below alert.

Environment: SQL Server 2005 Std With SP2 on Windows Server 2003 Ent

Please help why we are getting below deadlock

[Connection]:  abc.xyz.com
[Message]:  SQL Server Deadlock Detected
[Event Time]:  12/22/2012 3:52:10 PM
----------------------------------------------------------------------
[Timestamp (Local)]:  12/22/2012 3:52:10 PM
[Timestamp (UTC)]:  12/22/2012 11:52:10 PM
[Generated By]:  SQL Sentry 7.2 Server [SQLQADB02]
[Version]:  7.2.54.0
[Monitor Type]:  SqlServerProfiler
[Condition]:  SQL Server: Deadlock
[Response Ruleset]:  Notify Every Time (default)
----------------------------------------------------------------------
[Deadlock Victim Information]:
SPID [ecid]: 707 [0]
Host: host15
Application: .Net SqlClient Data Provider
Database: databse01
Login: WebServer
Log Used: 0
Deadlock Priority: 0
Wait Time: 1484
Transaction Start Time: 12/22/2012 3:52:09 PM
Last Batch Start Time: 12/22/2012 3:52:09 PM
Last Batch Completion Time: 12/22/2012 3:52:09 PM
Mode/Type: S
Status: suspended
Isolation Level: read committed (2)
Text Data:
    at databse01.dbo.up_Getads2 line 24
      SELECT
        H.ID as ID,
        H.ParentID as PID,
        RTRIM(REPLACE(REPLACE(REPLACE(H.Subject,'&amp;',  '&'), '&lt;', '<'), '&gt;', '>')) as T,
        dbo.fn_ConvertToXmlDate(H.PostDate) as D,
        RTRIM(REPLACE(REPLACE(REPLACE(H.PreviewText,'&amp;',  '&'), '&lt;', '<'), '&gt;', '>')) as PT,
        CASE
                WHEN Anonymous = 0 THEN RTRIM(U.Handle)
                ELSE 'Anonymous'
        END as A,

        CASE
                WHEN H.PollID = -1 THEN NULL
                ELSE 1
        END as P,

        CASE
                WHEN Status & 163
Client Options 2: 128056
Client Options 1: 538968096
Is Victim: True
Wait Resource: KEY: 5:72057594065518592 (2c00ac28262b)
Transaction Count: 0
Lock Timeout: 4294967295
SPID: 707
ECID: 0
Transaction ID: 423751167
Transaction Name: XML SELECT
Database ID: 5

-------------------------------------------------------
msghdrs-deadlock.JPG
0
Comment
Question by:spkvijay
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
5 Comments
 
LVL 15

Expert Comment

by:Anuj
ID: 38736928
Make sure you have proper indexes for this query, can you post the execution plans of this query?
0
 
LVL 43

Accepted Solution

by:
Eugene Z earned 2000 total points
ID: 38738562
..can be many reasons:
the main one the code -- you need to include Catch -TRY for proc..
Isolation Level: read committed is contributing as well

more:
Minimizing Deadlocks
http://msdn.microsoft.com/en-us/library/ms191242(v=sql.90).aspx

Although deadlocks cannot be completely avoided, following certain coding conventions can minimize the chance of generating a deadlock. Minimizing deadlocks can increase transaction throughput and reduce system overhead because fewer transactions are:
• Rolled back, undoing all the work performed by the transaction.

• Resubmitted by applications because they were rolled back when deadlocked.


To help minimize deadlocks:
• Access objects in the same order.

• Avoid user interaction in transactions.

• Keep transactions short and in one batch.

• Use a lower isolation level.

• Use a row versioning-based isolation level.
¿ Set READ_COMMITTED_SNAPSHOT database option ON to enable read-committed transactions to use row versioning.

¿ Use snapshot isolation.


• Use bound connections.


Detecting and Ending Deadlocks
http://msdn.microsoft.com/en-us/library/ms178104(v=sql.90).aspx


SET DEADLOCK_PRIORITY
http://msdn.microsoft.com/en-us/library/ms186736(v=sql.90).aspx

Set READ_COMMITTED_SNAPSHOT

http://msdn.microsoft.com/en-us/library/ms173763(v=SQL.90).aspx
0
 

Author Comment

by:spkvijay
ID: 38739522
I've requested that this question be deleted for the following reason:

Posted wrong one
0
 
LVL 43

Expert Comment

by:Eugene Z
ID: 38739523
<Posted wrong one>? :)

it looks like good one to me
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I have a large data set and a SSIS package. How can I load this file in multi threading?
In the first part of this tutorial we will cover the prerequisites for installing SQL Server vNext on Linux.
Viewers will learn how the fundamental information of how to create a table.
Viewers will learn how to use the SELECT statement in SQL to return specific rows and columns, with various degrees of sorting and limits in place.

764 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question