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You can use values from metrics from Image Added metrics or custom made metrics of your own to auto scale your EC Deployment. These metrics are retrieved by the Prometheus server and then published to Kubernetes by the Prometheus Adapter. To learn more about how metrics work in in  Image Added as well as what else you can use these metrics for, refer to Using Metrics (3.0).

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As the EC Deployment uses the metrics that are exposed by the Prometheus Adapter, it is crucial for you to know how to use the adapter to expose the metrics that you want the EC Deployment to use to scale itself. You can refer to Creating Custom Metrics on Prometheus Adapter(3.0) for more information about how to create your own metrics.