A company's media-sharing platform encounters fluctuating levels of user engagement, leading to sporadic performance bottlenecks and the overprovisioning of resources during quieter periods. Which AWS feature should be used to automatically adjust the number of Amazon EC2 instances to match real-time workload demands and optimize costs?
The correct service is AWS Auto Scaling. It monitors applications and automatically adjusts compute capacity to maintain steady, predictable performance at the lowest possible cost. In this scenario, it would add EC2 instances during traffic spikes and remove them during lulls, addressing both performance bottlenecks and overprovisioning. Migrating to AWS Lambda is a serverless approach that also scales automatically, but it represents a significant architectural change, and is not the direct tool for scaling a fleet of EC2 instances. Changing the EC2 instance type is a form of manual vertical scaling, which does not automatically adjust to fluctuating demand. AWS Budgets is a cost management service for monitoring and alerting on spend, but it does not automatically adjust resources.
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