Metrics

The metric configuration defines which metric type is watched by the Autoscaler.

Setting metrics per revision

For per-revision configuration, this is determined using the autoscaling.knative.dev/metric annotation. The possible metric types that can be configured per revision depend on the type of Autoscaler implementation you are using:

  • The default KPA Autoscaler supports the concurrency and rps metrics.
  • The HPA Autoscaler supports the concurrency, rps and cpu metrics.

For more information about KPA and HPA, see the documentation on Supported Autoscaler types.

  • Per-revision annotation key: autoscaling.knative.dev/metric
  • Possible values: "concurrency", "rps" or "cpu", depending on your Autoscaler type. The cpu metric is only supported on revisions with the HPA class.
  • Default: "concurrency"
apiVersion: serving.knative.dev/v1
kind: Service
metadata:
  name: helloworld-go
  namespace: default
spec:
  template:
    metadata:
      annotations:
        autoscaling.knative.dev/metric: "concurrency"

apiVersion: serving.knative.dev/v1
kind: Service
metadata:
  name: helloworld-go
  namespace: default
spec:
  template:
    metadata:
      annotations:
        autoscaling.knative.dev/metric: "rps"

apiVersion: serving.knative.dev/v1
kind: Service
metadata:
  name: helloworld-go
  namespace: default
spec:
  template:
    metadata:
      annotations:
        autoscaling.knative.dev/metric: "cpu"

Next steps