delta

Computes the backward difference at each data point in the time series to determine how much the metric has changed from its last value in the series.

The delta operator updates the metric dimension, if present, to delta($metric). If the original time series does not have a metric dimension, it creates metric=delta dimension. Other dimensions remain unaffected.

delta syntax

metric query | delta

delta examples

Difference in a metric value from previous point

This query returns a time series that reflects the difference in the Net_InBytes  metric for the eth0 interface  between a charted value and the one preceding it. 

metric=Net_InBytes Interface=eth0 | delta