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

Database cost choices: DynamoDB on-demand vs provisioned, Aurora Serverless v2, reserved DB instances and stopping idle databases

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Last reviewed September 30, 2026 · Leer en español

Databases are often among the largest line items on an AWS bill because they run all the time, and because teams size them for peak load and then leave them. Cost optimization here comes down to three habits: match the capacity model to the traffic pattern, commit where usage is steady, and stop paying for databases nobody is using. The exam presents a traffic description or an idle environment and asks for the most cost-effective option that still meets the requirement.

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