I have created a horizontal auto-scaler based on the cpu usage and it works fine. I want to know how I can configure the autoscaler in a way that it just scales up without scaling down? The reason I want such a thing is when I have high load/request I create some operators but I want to keep them alive even if for some amount of time they don't do anything but auto-scaler kills the pods and scaling down to the minimum replicas after sometime if there is no load.

My autoscaler:

apiVersion: autoscaling/v1
kind: HorizontalPodAutoscaler
metadata:
  name: gateway
  namespace: default
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: gateway
  minReplicas: 1
  maxReplicas: 10
  targetCPUUtilizationPercentage: 20

Edit: By operator, I mean small applications/programs that are running in a pod.