[{"data":1,"prerenderedAt":16},["ShallowReactive",2],{"blog-tag-en-replica-flapping":3},[4],{"path":5,"title":6,"description":7,"date":8,"tags":9},"\u002Fblog\u002Fen\u002Fk3s-hpa-scaledown-stabilization-window-replica-flapping","HPA Replica Count Flaps Every Few Minutes. The Root Cause Wasn't Metrics — It Was a Missing scaleDown Stabilization Window","On K3s, an HPA's replica count kept oscillating every few minutes even though metrics were perfectly healthy. The real cause was the asymmetric scaleUp\u002FscaleDown defaults and missing behavior design. Here's how to fix it with stabilizationWindowSeconds and CPU requests tuning.","2026-09-22",[10,11,12,13,14,15],"k3s","kubernetes","scaling-policy","stabilization-window","replica-flapping","cpu-requests",1792592708931]