Lock:Timeout (timeout > 0) Event Class

 

Applies To: SQL Server 2016

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.

Data column nameData typeDescriptionColumn IDFilterable
ApplicationNamenvarcharName 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.10Yes
BinaryDataimageLock resource identifier.2Yes
ClientProcessIDintID 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.9Yes
DatabaseIDintID 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.3Yes
DatabaseNamenvarcharName of the database in which the time-out occurred.35Yes
DurationbigintAmount of time (in microseconds) taken by the event.13Yes
EndTimedatetimeTime at which the event ended. This column is not populated for starting event classes, such as SQL:BatchStarting or SP:Starting.15Yes
EventClassintType of event=189.27No
EventSequenceintSequence of a given event within the request.51No
GroupIDintID of the workload group where the SQL Trace event fires.66Yes
HostNamenvarcharName 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.8Yes
IntegerData2intIdentified for informational purposes only. Not supported. Future compatibility is not guaranteed.55Yes
IsSystemintIndicates whether the event occurred on a system process or a user process. 1 = system, 0 = user.60Yes
LoginNamenvarcharName of the login of the user (either SQL Server security login or the Microsoft Windows login credentials in the form of DOMAIN\username).11Yes
LoginSidimageSecurity 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.41Yes
ModeintState 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
32Yes
NTDomainNamenvarcharWindows domain to which the user belongs.7Yes
NTUserNamenvarcharWindows user name.6Yes
ObjectIDintID of the object, if available and applicable.22Yes
ObjectID2bigintID of the related object or entity, if available and applicable.56Yes
OwnerIDint1=TRANSACTION

2=CURSOR

3=SESSION

4=SHARED_TRANSACTION_WORKSPACE

5=EXCLUSIVE_TRANSACTION_WORKSPACE
58Yes
RequestIDintID of the request containing the statement.49Yes
ServerNamenvarcharName of the instance of SQL Server being traced.26No
SessionLoginNamenvarcharLogin 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.64Yes
SPIDintID of the session on which the event occurred.12Yes
StartTimedatetimeTime at which the event started, if available.14Yes
TextDatantextText value dependent on the event class captured in the trace.1Yes
TransactionIDbigintSystem-assigned ID of the transaction.4Yes
Typeint1=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
57Yes

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

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