Interface plugin graphs are incorrect

[anryko]

• First, they are upside-down :)
• Second, derivative function rate normalisation parameter is incorrect. According to influxdb docs it should be 1s by default:

DERIVATIVE() can have two arguments. The first is required and is a field name. The second is optional and is a rate normalization parameter. If the second parameter is not provided defaults to 1s.

In reality with v0.9.4.2 i see derivative(mean("value")) and derivative(mean("value"), 1s) show different results and the later one is actually correct.

[anryko]

I missed part in documentation which mention that GROUP BY changes rate normalisation. So this is expected documented behaviour from InfluxDB.

[anryko]

Done https://github.com/anryko/grafana-influx-dashboard/commit/4e2e26d36aedb2a494a6a304ebb6c630d2317b11.