SAP-C02 Q558 · Cost

Question

A company runs production workloads on EC2 On-Demand Instances and RDS for PostgreSQL. They want to reduce costs without compromising availability or capacity. Which solution will meet these requirements?

Accepted Answer

Option C is correct because it addresses all three requirements — cost reduction, availability, and capacity — through a comprehensive, data-driven approach:

1. **AWS Compute Optimizer**: Analyzes historical utilization metrics (CPU, memory, network, disk) of EC2 instances and provides specific rightsizing recommendations. This is the most precise tool for identifying over-provisioned instances.

2. **AWS Trusted Advisor**: Provides broad cost optimization checks including underutilized EC2 instances, idle load balancers, and unassociated Elastic IPs. Complements Compute Optimizer with a wider lens.

3. **Rightsizing**: Adjusting instance types/sizes to match actual workload needs directly reduces waste. For example, changing from m5.2xlarge to m5.xlarge if CPU utilization averages 30%.

📖 Explanation

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📘 Key Concepts

🏗️ Architecture

⚙️ Operations

💰 Cost

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