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Vertical Pod Autoscaler and resource managers

HPA adds pods as load rises. VPA does the opposite: keep the pod count fixed but dial in the exact CPU/RAM each pod needs — no more setting requests at random and then wasting or starving. This article installs VPA (an add-on, like Metrics Server), lets it observe a real workload and produce a recommendation, then crosses to the node side: CPU Manager static policy pins whole CPU cores to a Guaranteed pod — tested for real, watching a pod get exactly one exclusive CPU.