Cutting P99 Latency by 88% and $4.2k/Mo Using WIP-Limited Ingestion: The Phoenix Project Pattern for Microservices
Current Situation Analysis We inherited a payment processing service that looked healthy on dashboards but collapsed under load. The architecture followed the standard "scale-out" dogma: Kubernetes Horizontal Pod Autoscaler (HPA) based on CPU, auto-scaling database read replicas, and aggressive ret...
