Which solution meets these requirements MOST cost-effectively?
Create a dashboard by using AWS Systems Manager OpsCenter. Configure visualizations for Amazon CloudWatch metrics that are associated with the EC2 instances and their EBS volumes. Review the dashboard periodically, and identify usage patterns. Rightsize the EC2 instances based on the peaks in the metrics.
Turn on Amazon CloudWatch detailed monitoring for the EC2 instances and their EBS volumes. Create and review a dashboard that is based on the metrics. Identify usage patterns. Rightsize the EC2 instances based on the peaks in the metrics.
Install the Amazon CloudWatch agent on each of the EC2 instances. Turn on AWS Compute Optimizer, and let it run for at least 12 hours. Review the recommendations from Compute Optimizer, and rightsize the EC2 instances as directed.
Sign up for the AWS Enterprise Support plan. Turn on AWS Trusted Advisor. Wait 12 hours. Review the recommendations from Trusted Advisor, and rightsize the EC2 instances as directed.
Explanations:
While creating a dashboard and periodically reviewing it is useful, this approach may not provide timely insights needed to efficiently identify usage patterns. It lacks automation and direct recommendations for rightsizing.
Similar to option A, turning on detailed monitoring and creating a dashboard allows for periodic reviews but does not provide automated rightsizing recommendations. This may lead to delays in identifying cost-saving opportunities.
Installing the CloudWatch agent and enabling AWS Compute Optimizer provides a detailed analysis of resource utilization and automated recommendations for rightsizing, making this option the most cost-effective and efficient for identifying usage patterns.
Signing up for the AWS Enterprise Support plan and relying on AWS Trusted Advisor is costly and does not provide immediate insights or automation in rightsizing, making it less efficient for the requirements stated.