Using TOP to check the cpu and memory status of K8s cluster host, I found that the CPU cost of Nginx-ingress-controller is always high. If I set the cpu limit to 2, then the CPU time would be almost 200%. If without cpu limit, the CPU time would be almost 400% in a 4-core VM. The nginx ingress controller is 0.8.3.

Is that normal?

Thanks

Liu Peng