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Chapter 11. Configuring burst and QPS for net-kourier
The queries per second (QPS) and burst values determine the frequency of requests or API calls to the API server.
11.1. Configuring burst and QPS values for net-kourier
The queries per second (QPS) value determines the number of client requests or API calls that are sent to the API server.
The burst value determines how many requests from the client can be stored for processing. Requests exceeding this buffer will be dropped. This is helpful for controllers that are bursty and do not spread their requests uniformly in time.
When the net-kourier-controller restarts, it parses all ingress resources deployed on the cluster, which leads to a significant number of API calls. Due to this, the net-kourier-controller can take a long time to start.
You can adjust the QPS and burst values for the net-kourier-controller in the KnativeServing CR:
KnativeServing CR example
apiVersion: operator.knative.dev/v1beta1
kind: KnativeServing
metadata:
name: knative-serving
namespace: knative-serving
spec:
workloads:
- name: net-kourier-controller
env:
- container: controller
envVars:
- name: KUBE_API_BURST
value: "200" 1
- name: KUBE_API_QPS
value: "200" 2
