How would you approach right-sizing a fleet of EC2 instances to optimize costs without sacrificing performance?

How would you approach right-sizing a fleet of EC2 instances to optimize costs without sacrificing performance?

• A. Analyze utilization metrics (CPU, memory, I/O), identify idle/underutilized instances, test performance after downsizing, implement autoscaling and schedule downtime, monitor outcomes.
• B. Terminate all instances and rely on spot instances.
• C. Increase instance size to ensure performance.
• D. Ignore metrics; only cost matters.

Answer: (A)