MTTR from 40 Minutes to 8: Cutting Fault Localization Time by 5x with a Four-Layer Defense
Overview 3 AM, phone vibrating. The alert channel exploded with 200 messages, and user complaints are already flooding customer service. You scramble to your laptop, log into the bastion host, and discover a core API endpoint’s P99 latency spiked to 8 seconds. For the next 30 minutes, you dig through logs, check Grafana dashboards, and ping upstream and downstream teams—only to find that a config center pushed an incorrect parameter....