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AWS Certified Solutions Architect – Associate SAA-C03 · Domain 4: Design Cost-Optimized Architectures

Spot Instances in practice: interruption notices, mixed-instances Auto Scaling groups and allocation strategies

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Last reviewed September 30, 2026 · Leer en español

Spot Instances can cut compute costs dramatically, but only architectures that tolerate interruption benefit. A Spot Instance is ordinary EC2 capacity that AWS is not currently selling at On-Demand prices; when that capacity is needed back, your instance is interrupted. This lesson covers how interruption works, how to be told about it, and how to design fleets that ride through it without users noticing.

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