Commit d6f6e7ac authored by Brian Brazil's avatar Brian Brazil Committed by GitHub

Merge pull request #474 from prometheus/brian-brazil-patch-1

Clarify that `deriv` is per-second.
parents 32d06836 c04661bf
......@@ -87,7 +87,7 @@ delta(cpu_temp_celsius{host="zeus"}[2h])
## `deriv()`
`deriv(v range-vector)` calculates the derivative of the time series in a range
`deriv(v range-vector)` calculates the per-second derivative of the time series in a range
vector `v`, using [simple linear regression](http://en.wikipedia.org/wiki/Simple_linear_regression).
`deriv` should only be used with gauges.
......
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