Ready Before the Spike: A Capacity Plan for the Whole Request Path
Adding an app instance is not the same as serving another checkout. Budget readiness time, test the constrained tier and keep spare capacity for failure.


A five-part field guide to running commerce and business systems under heavy, spiky load: load balancing and autoscaling, queues and workers, the data tier with Redis and pgvector, observability, and security with zero-downtime deploys.