Amazon ElastiCache Performance and Memory Economics
Understand how to tune Amazon ElastiCache for runtime efficiency by learning the impact of eviction policies, persistence options, connection handling, hot-key distribution, and data tiering on performance and cost. This lesson equips you to identify and resolve bottlenecks to improve cache hit rates and reduce latency while managing memory economics effectively.
With your ElastiCache cluster designed for high availability and global reach through multi-AZ failover and Global Datastore, the next operational challenge shifts from resilience to runtime efficiency. A cache that survives failures but delivers poor hit rates or costs more than the database it protects is not doing its job. Memory in ElastiCache functions simultaneously as a latency lever and a cost lever. Every byte of DRAM you provision determines how much data stays close to your application at sub-millisecond speed, and every byte you waste inflates your monthly bill without improving throughput.
This lesson walks through five performance and cost levers that govern how well an ElastiCache deployment actually performs under real workloads. You will learn how eviction policies determine whether a cache degrades gracefully or fails abruptly when memory fills, how persistence mechanisms ...