Glossary term
What is Little's Law? Meaning for developers
Items in the system = arrival rate × time each spends. Example: 500 req/s × 0.04 s = 20 requests in flight.
Learn it properly · System DesignLesson 8: Latency, Throughput & Why p99 MattersAn 80 ms average can hide a checkout that freezes for five seconds. Latency, throughput and Little's Law, why queues explode near full utilisation, and why at scale the p99 becomes what most users feel.