# 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](/grey-matter-documentation/usage/sense/prom.md) server. The views here present the Grey Matter metrics collected by the [metrics](/grey-matter-documentation/usage/fabric/filters/http/gm-metrics.md), but all [Envoy](https://www.envoyproxy.io/) metrics are collected as well.

## Views

### Summary

![Historical Metrics: Summary](/files/-M3SwPfFZ1N-_hdnhVng)

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](/files/-M3SwPfHhTuoE6AgPHRn)

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

### Instances

![Historical Metrics: Instances](/files/-M3SwPj4MWzaXGC3TVQv)

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](/grey-matter-documentation/usage/sense/instance.md) view.


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://greymatter.gitbook.io/grey-matter-documentation/usage/sense/historical.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.