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AWS Certified Solutions Architect Associate SAA-C03 Practice Question

A single Average CPU Utilization metric is sufficient for an auto-scaling group managing a fleet of EC2 instances in an e-commerce application to guarantee its high availability during peak times.

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Answer Description

Relying solely on Average CPU Utilization might not be sufficient to guarantee the high availability of an application during peak times. Auto-scaling decisions should be based on a broader set of metrics that reflect different aspects of system performance and user experience to avoid potential bottlenecks or resource constraints. These can include metrics like network I/O, disk I/O, memory usage, request latency, error rates, and throughput. A combination of these metrics can more accurately trigger scaling actions that maintain the application's high availability during demand surges.

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