You administer a Microsoft SQL Server 2012.
A process that normally runs in less than 10 seconds has been running for more than an hour.
You examine the application log and discover that the process is using session ID 60.
You need to find out whether the process is being blocked.
Which Transact-SQL statement should you use?
A.
SELECT * FROM sys.dm_exec_sessions WHERE session_id = 60
B.
DBCC INPUTBUFFER (60)
C.
EXEC sp_helpdb 60
D.
SELECT * FROM sys.dm_exec_request WHERE session_id = 60
The corect answer is A.
sys.dm_exec_sessions is a server-scope view that shows information about all active user connections and internal tasks. This information includes client version, client program name, client login time, login user, current session setting, and more. Use sys.dm_exec_sessions to first view the current system load and to identify a session of interest, and then learn more information about that session by using other dynamic management views or dynamic management functions.
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“You need to find out whether the process is being blocked.”
correct answer is D, because in that view exist information about blocking session id.
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SELECT * FROM sys.dm_exec_request WHERE session_id = 60
returns a syntax error Invalid object name ‘sys.dm_exec_request’.
It has to be A.
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I think it is a typo…..
select * from sys.dm_exec_requests;
That works….
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https://www.mssqltips.com/sqlservertip/2429/how-to-identify-blocking-in-sql-server/
There are number of ways to find out the details of the system processes IDs (spids) involved in blocking. Some of these options include:
sp_who2 System Stored Procedure
sys.dm_exec_requests DMV
Sys.dm_os_waiting_tasks
SQL Server Management Studio Activity Monitor
SQL Server Management Studio Reports
SQL Server Profiler
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D.
But have a error:
sys.dm_exec_request (error) because correct sys.dm_exec_requests
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A
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Same question like this:
http://www.aiotestking.com/microsoft/which-transact-sql-statement-should-you-use-153/
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sys.dm_exec_requests
Tested it
select blocking_session_id,* from sys.dm_exec_requests
where blocking_session_id0
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