</p></li><li><p>Mixer hands the instances to Mixer adapters for processing and backend storage.</p></li><li><p>The backend storage systems record the metrics data.</p></li></ol><p>The Mixer default installations include a Prometheus adapter and the configuration to generate a <a href=/v1.7/docs/reference/config/policy-and-telemetry/metrics/>default set of metric values</a> and send them to the Prometheus adapter. The Prometheus adapter configuration enables a Prometheus instance to scrape Mixer for metrics.