 src=/v1.24/blog/2019/knative-activator-adapter/knative-mixer-adapter.png alt="Knative scale-from-zero"></a></div><figcaption>Knative scale-from-zero</figcaption></figure><p>In this design, there is no need to change the routing from/to <strong>Activator</strong> for an idle application as in the original Knative setup.
When the Istio proxy represented by the ingress gateway component receives a new request for an idle application, it informs <strong>Mixer</strong>, including all the
relevant metadata infor