LLM Serving Overload Protection in Production: Guarding Tail Latency with Queue SLO, Backpressure, and Elastic Autoscaling
A production-grade guide for LLM inference services: using queue wait time, TTFT SLO, backpressure, and elastic autoscaling to handle traffic spikes, avoid scaling lag, tail latency blowups, and unbounded queuing. Includes key metrics, configuration, launch checklist, and common pitfalls.