Jonathan • 8/31/2025

Understanding and Fixing CPU Limits in Kubernetes

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This technical article explains the root causes of CPU throttling in Kubernetes pods, even when nodes have idle CPU. It details how the Linux CFS scheduler enforces CPU limits, how to monitor throttling using Prometheus metrics, and discusses a specific Linux kernel regression that caused significant performance issues on high-core-count machines.

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#performance monitoring #Kubernetes #Container Orchestration
Understanding and Fixing CPU Limits in Kubernetes

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