# Historical Metrics

The historical metrics view displays all Grey Matter metrics collected for this service. These metrics are automatically collected by the Sidecar deployed with each service, and aggregated mesh-wide by an internal [Prometheus](https://greymatter.gitbook.io/grey-matter-documentation/1.3/usage/telemetry/prom) server. The views here present the Grey Matter metrics collected by the [metrics](https://greymatter.gitbook.io/grey-matter-documentation/1.3/reference/api/fabric-api/filters/http/gm-metrics), but all [Envoy](https://www.envoyproxy.io/) metrics are collected as well.

## Views

### Summary

![Historical Metrics: Summary](https://1676458320-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LsNFVozLgvw3NDMzxBg%2Fsync%2Fc68ef60a178811166ff6c974cb28de5076b751b1.png?generation=1605196229062212\&alt=media)

The summary view shows some of the most important metrics collected. Here are things like uptime, service-level latencies, route-level usage, host performance, request and error rates.

### Routes

![Historical Metrics: Routes](https://1676458320-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LsNFVozLgvw3NDMzxBg%2Fsync%2F6755d58813ad5cde9e0f496276b5974f45219342.png?generation=1605196245306011\&alt=media)

The routes view focuses on the route level performance rather than the service as a whole.

### Instances

![Historical Metrics: Instances](https://1676458320-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LsNFVozLgvw3NDMzxBg%2Fsync%2F48445ceb2a1bafb7b0ec2323ad5605788d94d0a3.png?generation=1605287851761165\&alt=media)

The Instances view shows the number of individual instances running for the given service. Each line shows a unique ID for each instance, as well as the time the service has been up. Clicking on the Instance ID will drop you down into the [real-time metrics](https://greymatter.gitbook.io/grey-matter-documentation/1.3/usage/telemetry/instance) view.