Lock:Timeout (timeout > 0) Event Class

The Lock:Timeout (timeout > 0) event class indicates that a request for a lock on a resource, such as a page, has timed out because another transaction is holding a blocking lock on the required resource. This event class behaves the same as the Lock:Timeout event class, except it does not include any events where the timeout value is 0.

Include the Lock:Timeout (timeout > 0) event class in traces where you are using lock probes or other processes that have timeout values of zero. This allows you to see where actual time-outs are occurring without seeing time-out values of zero.

Lock:Timeout (timeout > 0) Event Class Data Columns

Data column name Data type Description Column ID Filterable
ApplicationName nvarchar Name of the client application that created the connection to an instance of SQL Server. This column is populated with the values passed by the application rather than the displayed name of the program. 10 Yes
BinaryData image Lock resource identifier. 2 Yes
ClientProcessID int ID assigned by the host computer to the process where the client application is running. This data column is populated if the client provides the client process ID. 9 Yes
DatabaseID int ID of the database in which the timeout occurred. SQL Server Profiler displays the name of the database if the ServerName data column is captured in the trace and the server is available. Determine the value for a database by using the DB_ID function. 3 Yes
DatabaseName nvarchar Name of the database in which the time-out occurred. 35 Yes
Duration bigint Amount of time (in microseconds) taken by the event. 13 Yes
EndTime datetime Time at which the event ended. This column is not populated for starting event classes, such as SQL:BatchStarting or SP:Starting. 15 Yes
EventClass int Type of event=189. 27 No
EventSequence int Sequence of a given event within the request. 51 No
GroupID int ID of the workload group where the SQL Trace event fires. 66 Yes
HostName nvarchar Name of the computer on which the client is running. This data column is populated if the client provides the host name. To determine the host name, use the HOST_NAME function. 8 Yes
IntegerData2 int Identified for informational purposes only. Not supported. Future compatibility is not guaranteed. 55 Yes
IsSystem int Indicates whether the event occurred on a system process or a user process. 1 = system, 0 = user. 60 Yes
LoginName nvarchar Name of the login of the user (either SQL Server security login or the Microsoft Windows login credentials in the form of DOMAIN\username). 11 Yes
LoginSid image Security identification number (SID) of the logged-in user. You can find this information in the sys.server_principals catalog view. Each SID is unique for each login in the server. 41 Yes
Mode int State that the event has received or is requesting.

0=NULL

1=Sch-S

2=Sch-M

3=S

4=U

5=X

6=IS

7=IU

8=IX

9=SIU

10=SIX

11=UIX

12=BU

13=RangeS-S

14=RangeS-U

15=RangeI-N

16=RangeI-S

17=RangeI-U

18=RangeI-X

19=RangeX-S

20=RangeX-U

21=RangeX-X
32 Yes
NTDomainName nvarchar Windows domain to which the user belongs. 7 Yes
NTUserName nvarchar Windows user name. 6 Yes
ObjectID int ID of the object, if available and applicable. 22 Yes
ObjectID2 bigint ID of the related object or entity, if available and applicable. 56 Yes
OwnerID int 1=TRANSACTION

2=CURSOR

3=SESSION

4=SHARED_TRANSACTION_WORKSPACE

5=EXCLUSIVE_TRANSACTION_WORKSPACE
58 Yes
RequestID int ID of the request containing the statement. 49 Yes
ServerName nvarchar Name of the instance of SQL Server being traced. 26 No
SessionLoginName nvarchar Login name of the user who originated the session. For example, if you connect to SQL Server using Login1 and execute a statement as Login2, SessionLoginName shows Login1 and LoginName shows Login2. This column displays both SQL Server and Windows logins. 64 Yes
SPID int ID of the session on which the event occurred. 12 Yes
StartTime datetime Time at which the event started, if available. 14 Yes
TextData ntext Text value dependent on the event class captured in the trace. 1 Yes
TransactionID bigint System-assigned ID of the transaction. 4 Yes
Type int 1=NULL_RESOURCE

2=DATABASE

3=FILE

5=OBJECT

6=PAGE

7=KEY

8=EXTENT

9=RID

10=APPLICATION

11=METADATA

12=AUTONAMEDB

13=HOBT

14=ALLOCATION_UNIT
57 Yes

See Also

Lock:Timeout Event Class
sp_trace_setevent (Transact-SQL)
sys.dm_tran_locks (Transact-SQL)