When 300 Stores Printed at Once: Debugging a 350% Compute Spike in Power BI Fabric

A routine Monday morning turned into a full-blown capacity crisis when 300 retail stores began printing reports simultaneously, pushing our Power BI Fabric environment to 350% utilization. This article walks through the root cause - XMLA read operations from paginated reports bypassing cache layers and how we traced, tested and resolved it by creating a lean semantic model. Along the way, we learned why governance, workload segmentation, and visibility matter more than infrastructure size. It’s a real-world story about balancing performance, scale and trust in enterprise BI systems.