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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 the SQL Server instances in real time and optimize the server to maximize throughput,
response time, and overall SQL performance.
You need to collect query performance data while minimizing the performance impact on the SQL Server.
What should you do?

A.
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:
SQL Server Data Collector is a feature for performance monitoring and tuning available in SQL Server
Management Studio.
Integration Services packages transform and load the collected data into theMicrosoft Data Warehouse
database.
Collection sets are defined and deployed on a server instance and can be run independently of each other.
Each collection set can be applied to a target that matches the target types of all the collector types that are
part of a collection set. The collection set is run by a SQL Server Agent job or jobs, and data is uploaded to the
management data warehouse on a predefined schedule.
Predefined data collection sets include:
* The Query Statistics data collection set collects information about query statistics, activity, execution plans
and text on the SQL Server instance. It does not store all executed statements, only 10 worst performing ones.
* Disk Usage data collection set collects information about disk space used byboth data and log files for all
databases on the SQL Server instance, growth trends, and average day growth.
Etc.
http://www.sqlshack.com/sql-server-performance-monitoring-data-collector/