Amazon ElastiCache
ElastiCache for Memcached User Guide (API Version 2015-02-02)

Monitoring Usage, Events, and Costs

To manage your enterprise caching solution, it's important that you know how your clusters are performing and the resources they're consuming. It's also important that you know the events that are being generated and the costs of your deployment.

Amazon CloudWatch provides metrics for monitoring your cache performance. In addition, cost allocation tags help you monitor and manage costs.