An EC2 instance shows 15% CPU utilization for 55 minutes and spikes to 85% CPU for 5 minutes each hour. What is the best right-sizing recommendation?

medium📝 Predict Output Q4 of 15

AWS - Cost Optimization

AChoose a larger instance to handle peak CPU usage

BDownsize the instance to save costs since average CPU is low

CSwitch to a spot instance to reduce costs during low usage

DTerminate the instance and use serverless instead

Step-by-Step Solution

Solution:

Step 1: Analyze CPU usage pattern
CPU is low most of the time but spikes significantly for short periods.
Step 2: Consider performance impact
Downsizing risks performance degradation during spikes.
Step 3: Right-sizing decision
Choosing a larger instance ensures capacity for peak loads.
Final Answer:
Choose a larger instance to handle peak CPU usage -> Option A
Quick Check:
Right-size for peak demand to avoid throttling [OK]

Quick Trick: Right-size for peak usage, not just average [OK]

Common Mistakes:

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