Which configuration change will meet this requirement with the LEAST operational overhead?
Add EC2 instances in another Availability Zone.
Change the size and type of the EC2 instances based on utilization.
Convert the payment method from On-Demand to Savings Plans.
Reprovision the EC2 instances with a larger instance type.
Explanations:
Adding EC2 instances in another Availability Zone does not directly address rightsizing. It may increase overall capacity without optimizing resource utilization or cost.
Changing the size and type of the EC2 instances based on utilization directly addresses rightsizing by optimizing the instances to better match the current workload, which reduces costs and improves efficiency with minimal operational overhead.
Converting the payment method from On-Demand to Savings Plans does not change the instance types or sizes, and while it may reduce costs, it doesn’t meet the requirement of rightsizing instances.
Reprovisioning EC2 instances with a larger instance type increases resource allocation and may lead to higher costs without optimizing current utilization. This option involves more operational overhead than changing sizes based on utilization.
I organize that the answer is:
Change the size and type of the EC2 instances based on utilization.