# Metrics

The **Metrics** tab shows how much your app uses and how it answers, over the last 15 minutes, the last hour, the last 24 h or the last 7 days.

- **CPU**: in vCPU (1 is one full core), with your app's limit.
- **Memory**: what your app uses, without the file cache, with its limit.
- **Disk**: the files in its volumes, and the files the app wrote outside them. dudbox measures disk every 5 minutes.
- **Network**: bytes per second in and out.
- **Requests**: requests per minute to your app's domains.
- **Error rate**: the share of answers with a 5xx status.
- **Response time**: p50 (half of the requests were faster) and p95 (95 of 100 were faster), from the moment a request reaches dudbox until your app's answer is sent.

Each chart shows the average of each step: 10 seconds in the last 15 minutes, 30 seconds in the last hour, 5 minutes in 24 h, 30 minutes in 7 days. The newest value is at the top right of the chart, next to the app's limit for CPU and memory (used / limit); hover the chart for the value and time at any moment. A dotted vertical line is a deployment that went live: hover it to see which one and its commit message, click it to open the deployment. When CPU or memory comes near the app's limit, a dashed line shows the limit. A gap means dudbox had no numbers for that time, for example while the app was not running.

Databases (Postgres, MySQL, Redis) show CPU, memory, disk and network. They have no requests: only your apps reach them. An app without a domain has no request charts either.

Some apps keep the files they write outside volumes in a sandbox that dudbox cannot weigh: their Disk chart says "Volumes only". A chart says when a number is not measured; it never shows it as 0.