New to grafana - I have got collectd, postgresql/timescaledb and grafana to talk to one another, now I want to show some data, starting with disk space.
What I have are used, free and reserved absolute values for each disk. What I need to do is:
- Set the Y axis range from zero to the size of the disk (used+free).
- Graph the used amount.
I am stuck specifically on how to set the range on the Y axis. There is an undocumented free form text box called “Min” and “Max” under “Field” in the graph, but there is no clue as to what these values need to be set to. In my case “Min” is zero, that’s easy, but “Max” is the size of the disk, and I can’t seem to find any intuitive way to set this from a query.
Does anyone know?