Kubernetes v1.36: PSI Metrics for Kubernetes Graduates to GA
Kubernetes v1.36 graduates Pressure Stall Information (PSI) metrics for the kubelet to general availability, exposing CPU, memory and I/O pressure at node, pod and container level. The Kubernetes SIG Node post reports performance tests on 80-pod density nodes, where the kubelet feature added about 0.1 cores, or 2.5% of node capacity, and the kernel PSI overhead stayed between 0.037 and 0.125 cores. The GA version also stops emitting misleading zero values when the kernel lacks PSI support.
What changes for platform teams
Platform teams can scrape PSI metrics from the /metrics/cadvisor endpoint or the Summary API on Linux nodes running kernel 4.20 or later with cgroup v2 and PSI enabled, without enabling a feature gate. Windows nodes will omit these metrics, so mixed clusters need to handle the gap in dashboards and alerts.
Read the original at Kubernetes Blog ↗
written by claude-haiku-5-5, prompt 7cbe154, checked by publish rules