LEARN. PRACTICE. GROW.Concept and mechanism
A cost recommendation needs comparison with the service still required. The observed period may exclude monthly closing, a quarterly peak, or backlog recovery. Confirm the metric population, measured resources, and calendar before deciding to downsize. Compute Optimizer helps compare capacity and risk, but the team remains responsible for validating workload and dependencies. Moving to Graviton requires checking native binaries and libraries rather than only memory and CPU. Instance boot establishes less than a representative execution with integrity, completion time, and defined rollback criteria.
Guided application
For storage, identify the actual limit before buying capacity. With gp3, IOPS and throughput can be adjusted separately from GiB, subject to volume and instance limits. Do not automatically transfer gp2 credit or capacity logic. AWS Budgets provides tracking and notifications with delay; an alert threshold is not an immediate cutoff of all spending. Define ownership and response and consider what can still be consumed between measurement, notification, and action. In FinOps, document total cost, change effort, deadline risk, and post-change results so an attractive estimate is not confused with demonstrated operational savings.
The batch uses an x86 library and the candidate is Graviton. Validate compatibility and peak load before promotion; a cheaper instance missing closing does not satisfy the requirement.
Common pitfalls
Average CPU treated as total capacity; budget treated as hard cap; extra GiB treated as the only way to obtain IOPS.
Related topics: Signals, alarms, and operational diagnosis · Continuity and usable recovery · Changes, drift, and controlled automation
Optimize cost with evidence of service, compatibility, and reversibility.
Reference: Compute Optimizer EC2 recommendations · SOA-C02 archived guide v2.3; retired2025-09-29