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Chapter 6 · Cost and Performance Optimization·v2.0.0·Updated 6/3/2026·~8 min

What's changed: Deepened SOA-C02 Chapter 6 to Associate depth (tables, scenarios, FAQ, traps; localized figures)

6.2Resource and Performance Optimization

Key points

Understand right-sizing with Compute Optimizer, pricing models (Savings Plans / Reserved / Spot), and optimizing performance/cost with caching and storage tiers.

Cost and performance are not strictly a trade-off—right sizing, pricing models, and caching can achieve both. Operations continuously reduce waste.

6.2.1Optimization levers

Diagram of three levers: right-size (match instance to load, Compute Optimizer hints, stop idle), pricing models (Savings Plans/RI, Spot for fault-tolerant, match to workload), and cache & storage tiers (CloudFront/ElastiCache, S3 tiers/lifecycle, faster & cheaper).
Performance and cost optimization
  • Right-sizing: pick the minimal instance for the load; Compute Optimizer gives recommendations.
  • Pricing models: Savings Plans / Reserved for steady load, Spot for interruptible batch.
  • Cache/storage tiers: speed up with CloudFront/ElastiCache; optimize cost with S3 classes/lifecycle.
Exam point

Common on SOA: underused large instance = right-size (Compute Optimizer), discount for steady load = Savings Plans/RI, interruptible batch = Spot, infrequently accessed data = cheaper S3 classes/lifecycle.

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