How Long Does That Response Take... For Real?
Summary
The article argues that memcached response time metrics are most accurate when measured from the client, as server-side timings can be misleading under load. It explains how response times are influenced by processing, I/O, and network factors, and recommends using total client-side latency and cross-metrics correlations for actionable observability. Practical guidance and example tools are provided to help implement meaningful performance monitoring for caching systems.