Kubernetes v1.36: PSI Metrics for Kubernetes Graduates to GA

The **Kubernetes Blog** announced that **Pressure Stall Information (PSI)** metrics have officially graduated to **General Availability (GA)** in **Kubernetes v1.36**. Originally introduced in the **Linux kernel** in **2018**, **PSI** provides a stable framework for cluster operators seeking reliable telemetry signals.

Technically, **PSI metrics** differ from **traditional utilization metrics** by evaluating actual execution delays rather than simple resource usage. The mechanism calculates and packages workload stalls into explicit percentages of time lost across **CPU**, **memory**, and **I/O** hardware resources.

For software engineers and platform builders, these **high-fidelity signals** allow teams to quantify system contention directly. By capturing time lost to stalled tasks across **CPU**, **memory**, and **I/O**, operators can identify **resource saturation** before it degrades into a full infrastructure outage.

From a market and operational context, the standardization of **Linux kernel PSI** inside **Kubernetes v1.36** moves container telemetry past legacy **utilization tracking**. Monitoring shifts from measuring total capacity consumption to observing exact time delays caused by hardware bottlenecks.

As a practical takeaway, organizations running **Kubernetes v1.36** can integrate these **GA metrics** directly into monitoring systems. Tracking percentages of time lost across **CPU**, **memory**, and **I/O** provides concrete data points to eliminate **resource saturation** risks across clusters.