---
title: Metrics
description: The numbers your services expose, charted per service, and what each container uses now.
order: 3
---

**Metrics** charts one metric at a time for the environment, one line per service, over a
range you pick. A counter is drawn as a rate per second, a gauge as its average.

Under the chart, every container of the environment shows the CPU and memory it uses right
now. That needs nothing from your service.

## Exposing your own

Ops reads metrics in the Prometheus text format from a service's `/metrics` path every 15
seconds. With the Rust `ops-sdk`, the `observability` feature has a middleware that counts
requests and a handler that serves `/metrics`.

Reading a new service's `/metrics` is switched on by whoever administers your ops; it is
not a setting in the console yet.

## How long

Full detail is kept for three days, and five minute averages for thirteen months. A range
longer than a day is drawn from the averages.