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How to enable the trace flag for deadlock in sql error log

Posted on 2007-03-29
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Last Modified: 2012-06-22
Hi how could I turn in the trace to capture the deadlock information whenever there is a lock, the trace should be able to capture in sql error log
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Question by:motioneye
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7 Comments
 
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Accepted Solution

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Kevin3NF earned 500 total points
ID: 18818733
dbcc traceon (1204, 3605)

Or

Set startup parameters:

-T1204
-T3605

and restart the sql server.  This method is necessary if you want the trace flag to stay on after restarts
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Assisted Solution

by:Kevin3NF
Kevin3NF earned 500 total points
ID: 18818742
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Author Comment

by:motioneye
ID: 18818854
Set startup parameters: will the below command work?

sqlservr –d"C:\Program Files\Microsoft SQL Server\MSSQL\Data\master.mdf" –T1204

sqlservr –d"C:\Program Files\Microsoft SQL Server\MSSQL\Data\master.mdf" –T3605

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Author Comment

by:motioneye
ID: 18820275
Guys,
I run the dbcc traceon (1204,3605)

But I did not get any log return regarding the deadlock even the server has quite significant number of blocking\locking
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LVL 21

Expert Comment

by:Kevin3NF
ID: 18822701
Blocking/locking is NOT the same as deadlocking
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Author Comment

by:motioneye
ID: 18829993
so,
is that mean trace flag 1204 will only capture deadlock information?
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LVL 21

Expert Comment

by:Kevin3NF
ID: 18830401
yes, that is its purpose.  Sp_Lock will show you locking info, and sysprocess as well as sp_who and sp_who2 will show you blocking related data
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