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How do I trace Deadlocks in SQL Server 2008 R2 | An Idea Factory
https://zeusrules.wordpress.com/2011/05/07/how-do-i-trace-deadlocks-in-sql-server-2008-r2/
SQL query to get the deadlocks in SQL SERVER 2008
https://stackoverflow.com/questions/12422986/sql-query-to-get-the-deadlocks-in-sql-server-2008
In order to capture deadlock graphs without using a trace (you don't need profiler necessarily), you can enable trace flag 1222. This will write deadlock information to the error log. However, the error log is textual, so you won't get nice deadlock graph pictures - you'll have to read the text of the deadlocks to figure it out.
How to find old deadlock information on sql server 2008?
https://social.msdn.microsoft.com/Forums/sqlserver/en-US/2af3f4c2-4a35-4272-b13c-dc2a0616f54a/how-to-find-old-deadlock-information-on-sql-server-2008
On sql server 2008 R2, In order to get detail information about deadlock that happened before, I still need to enable trace flag--DBCC TRACEON (1222,-1) first and then when deadlock happens, detail info about this deadlock will be written into sql server log. Then I may run . EXEC sp_readerrorlog . to find detail information about that deadlock.
Retrieving Deadlock Graphs with SQL Server 2008 Extended Events
https://www.sqlservercentral.com/articles/retrieving-deadlock-graphs-with-sql-server-2008-extended-events-1
Prior to SQL Server 2008, there was no way to retroactively find deadlock information. Obtaining deadlock graphs required that a SQL Trace was actively running, or that Trace Flag 1222 or 1205 were...
Tracing a SQL Server Deadlock - mssqltips.com
https://www.mssqltips.com/sqlservertutorial/252/tracing-a-sql-server-deadlock/
Deadlock information can be captured in the SQL Server Error Log or by using Profiler / Server Side Trace. Trace Flags. If you want to capture this information in the SQL Server Error Log you need to enable one or both of these trace flags. 1204 - this provides information about the nodes involved in the deadlock
How to find old deadlock information on sql server 2008?
https://social.msdn.microsoft.com/Forums/office/en-US/2af3f4c2-4a35-4272-b13c-dc2a0616f54a/how-to-find-old-deadlock-information-on-sql-server-2008?forum=sqldatabaseengine
On sql server 2008 R2, In order to get detail information about deadlock that happened before, I still need to enable trace flag--DBCC TRACEON (1222,-1) first and then when deadlock happens, detail info about this deadlock will be written into sql server log. Then I may run. EXEC sp_readerrorlog .
How to debug deadlocks in SQL Server 2008 R2?
https://dba.stackexchange.com/questions/25030/how-to-debug-deadlocks-in-sql-server-2008-r2
When a deadlock condition occurs, SQL server automatically detects it and choose one of the queries as a victim and throws error 1205. If you are really experiencing deadlock errors, turn on trace flag 1222. It will log the deadlock errors to the SQL server log.
Turn On Deadlock Trace Flag - SQL Server Planet
https://sqlserverplanet.com/troubleshooting/turn-on-deadlock-trace-flag
There are two versions of the trace flag. The best one to use is the 1222, which only works on SQL 2005+. The major difference between the two is that the old one truncated the results at times and was hard to read. I have found no performance impact at all when enabling these on production servers. Turn on deadlock tracing: [cc lang=”sql ...
SQL Server 2014, how to enable deadlock logging (NOT …
https://social.technet.microsoft.com/Forums/Lync/en-US/fa1299f9-1cf6-4b3c-884e-8414ac7a15f2/sql-server-2014-how-to-enable-deadlock-logging-not-sql-profiler
If you are using SQL Server 2008 and above you don't need to enable any trace flag. Plus trace flag may miss some of the deadlock graphs. I would rely on extended events because this automatically captures deadlock information for you You have to do nothing but just run query to fetch it.
Notification on long-running query or deadlock in SQL Server 2008 …
https://dba.stackexchange.com/questions/5107/notification-on-long-running-query-or-deadlock-in-sql-server-2008-r2
With SQL 2008 there is a new feature that you can use for deadlocks and long running queires: extended events. Extended events are low level objects and consume much lesser resources than other methods like profiling/tracing, alerts, etc... For using extended events with deadlocks check out this post by Jonathan Kehayias, a SQL server MVP.
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