The Development Team has installed a memory-intensive application on the Amazon EC2 instance.
IT Manager is looking for AWS Compute Optimizer analysis based upon memory utilization of the Amazon EC2 instance to improve the performance of the application.
What configuration needs to be done to meet this requirement?

Answer options:

A.Install CloudWatch Agent on Amazon EC2 instance enabling memory utilization & defining “mem_util” dimension in the CloudWatch Agent configuration file.
B.Install CloudWatch Agent on Amazon EC2 instance enabling memory utilization & defining “mem_used_percent” dimension in the CloudWatch Agent configuration file.
C.Install CloudWatch Agent on Amazon EC2 instance enabling memory utilization & defining “custom” dimension in the namespace of CloudWatch Agent configuration file.
D.Install CloudWatch Agent on Amazon EC2 instance enabling memory utilization & defining “InstanceId” dimension in the namespace of CloudWatch Agent configuration file.

Correct Answer: D
For memory utilization of the Amazon EC2 instance, CloudWatch Agent needs to be installed on the Amazon EC2 instance. Also, the “InstanceId” dimension should be defined in the namespace of the CloudWatch Agent configuration file. AWS Compute Optimizer analyses the “InstanceId” dimension to collect memory utilization data of Amazon EC2 instance. 
Options A, B, & C are incorrect as the “InstanceId” dimension should be defined in the namespace of the CloudWatch Agent configuration file so that the AWS Compute Optimizer can collect memory utilization data. “mem_util”, “mem_used_percent” & “custom” are invalid options & will not help to collect memory utilization from Amazon EC2 instances.
For more information on metrics analyzed by AWS Compute Optimizer, refer to the following URL,
https://docs.aws.amazon.com/compute-optimizer/latest/ug/metrics.html