Note: This question is part of a series of questions that use the same or similar answer choices. An Answer
choice may be correct for more than one question in the series. Each question independent of the other
questions in this series. Information and details provided in a question apply only to that question.
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.
Ans is A
6
15
Is seems that you are right:
“Previously, we covered the DMV sys.dm_os_wait_stats, and also saw how it can be useful to identify the major resource bottleneck. However, at the same time, we discussed that this is only useful when we are looking at an instance-level picture. Quite often we want to know about the processes going in our server at the given instant. Here is the query for the same.”
https://blog.sqlauthority.com/2011/02/04/sql-server-dmv-sys-dm_os_waiting_tasks-and-sys-dm_exec_requests-wait-type-day-4-of-28/
1
4
“You need to identify previous situations”
G is ok with me
4
0