Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 859 discussion

AnswerAC We have On-Demand instances of RDS. If DB is used very often then it can occur that using Reserved Instrance can bring some $$ savings. It is mentioned in AWS docs :) https://docs.aws.amazon.com/awssupport/latest/user/cost-optimization-checks.html#amazon-ec2-reserved-instances-optimization

High utilization means we don't care about idle-- that isn't the problem we are solving.

Chat AI - B. Use the Trusted Advisor recommendations in the member accounts where the RDS DB instances are running. — The finance team needs to run checks in the accounts where the RDS instances actually reside. C. Review the Trusted Advisor checks for Amazon RDS Reserved Instance Optimization. — Trusted Advisor will suggest buying RDS Reserved Instances for cost savings if DBs have high utilization.

A is correct You can set up the organizational view feature to create a report for all member accounts in your AWS organization. For more information, see Organizational view for AWS Trusted Advisor.

A is incorrect, as Trust advisor recommendations are account specific. Trusted Advisor in the management account provides insights only for that account, not for member accounts. Unless you have a centralized tool that aggregates recommendations, this option alone does not meet the requirement. C helps identify opportunities to save money by purchasing Reserved Instances for RDS if usage patterns justify it. This is one of the key cost optimization strategies for highly utilized RDS instances.

B is OK but less efficient than A. D is extremely unlikely because "instances have high utilization". E - The finance team is focused on RDS for Oracle On-Demand DB instances, not compute (EC2) instances, so this check won’t be useful for optimizing RDS costs.

"On-Demand DB instances that have high utilization" High Utilization = no point in checking for Idle instances On-Demand = it makes sense to replace On-demand for Reserved instances.

https://docs.aws.amazon.com/awssupport/latest/user/cost-optimization-checks.html

I THINK IT'S C,D

Instances are running On-Demand, they need to check to see if they can save money by switching the reserved instances from on-demand An important part of using AWS involves balancing your Reserved Instance (RI) purchase against your On-Demand Instance usage. This check provides recommendations on which RIs will help reduce the costs incurred from using On-Demand Instances.

Cost Optimization: By providing actionable recommendations, Trusted Advisor assists you in identifying areas of overspending and underutilization, like idle RDS DB instances or underused EBS volumes, leading to significant cost savings.

Please check with question 308. It should run in management account and review the Trusted Advisor check for Amazon RDS Idle DB Instances.

https://docs.aws.amazon.com/awssupport/latest/user/cost-optimization-checks.html#amazon-rds-reserved-instance-optimization

Option A,E

use Trusted advisor on management account

https://docs.aws.amazon.com/awssupport/latest/user/organizational-view.html