# MySQL metrics

Source: https://docs.fortrabbit.com/platform/metrics/mysql
Published: 2026-10-24
Updated: 2026-10-24
Reviewed: 2026-10-24

> How fortrabbit measures the database space an environment uses, how a bar is built from the samples, and what makes it grow.


## MySQL storage

The space the database of the environment uses. A sample holds the size at that moment. A bar shows four values from its samples:

- max: the largest size of the hour or day
- last: the size at the end of the hour or day
- avg: the average size
- min: the smallest size

The lines mark the storage of each MySQL plan. See [why MySQL storage grows](/platform/components/mysql#why-mysql-storage-grows) and [autoscaling](/platform/billing/autoscaling).

## Labels and lines

The values each metric shows in one bar, for the time frame, and on the summary page, and the lines drawn across the chart:



---

- [MySQL component](/platform/components/mysql)
- [Database performance](/dev/performance/database)
- [Metric values](/platform/metrics/values)