At 3:17 AM on a Tuesday in Q3 2024, our production Kotlin 2.0 microservice fleet hit a 92% memory utilization threshold across 140 nodes, traced to a silent coroutine leak in Ktor 2.2’s request pipeline that had been bleeding 12MB of heap per second for 72 hours. We lost $14k in SLO credits before we found the root cause. A Couple Million Lines of Haskell: Production Engineering at Mercury (78 p
Under the Hood: How Argo Rollouts 1.8 Implements Canary Deployments with Kubernetes 1.33 and Prometheus 3.1 Canary deployments remain a gold standard for risk-free application rollouts, allowing teams to shift a small percentage of traffic to a new version before full cutover. Argo Rollouts 1.8, released alongside Kubernetes 1.33 and Prometheus 3.1, introduces critical under-the-hood optimizatio