How Kubernetes v1.36 Fixes the Horizontal Controller Scaling Problem

The Real Cost of Watching Everything Run a horizontally scaled controller across a large Kubernetes cluster—say, three replicas of a custom resource controller in a 5,000-node cluster. Each replica receives the entire event stream from the API server. It deserializes every Pod, every ConfigMap, every change, filters out 66% of them, and discards the rest. Multiply that waste by dozens of controllers and you're burning CPU and bandwidth on work that never had to happen. This is the scaling wal...