Note: This question is part of a series of questions that use the same or similar answer choices. An Answer
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You are a database developer for a company. The company has a server that has multiple physical disks. The
disks are not part of a RAID array. The server hosts three Microsoft SQL Server instances. There are many
SQL jobs that run during off-peak hours.
You must monitor and optimize the SQL Server to maximize throughput, response time, and overall SQL
performance.
You need to identify previous situations where a modification has prevented queries from selecting data in
tables.
What should you do?
A.
Create a sys.dm_os_waiting_tasks query.
B.
Create a sys.dm_exec_sessions query.
C.
Create a Performance Monitor Data Collector Set.
D.
Create a sys.dm_os_memory_objects query.
E.
Create a sp_configure ‘max server memory’ query.
F.
Create a SQL Profiler trace.
G.
Create a sys.dm_os_wait_stats query.
H.
Create an Extended Event.
Explanation:
sys.dm_os_wait_stats returns information about all the waits encountered by threads that executed. You can
use this aggregated view to diagnose performance issues with SQL Server and also with specific queries and
batches.