random(<numberOfTimeSeries>, <expression>) random()
When used as a filtering function, returns the specified number of time series chosen randomly from the series described by the expression.
When used as a value generator (no parameters), returns a series of random values between 0.0 and 1.0.
|numberOfTimeSeries||Number of time series in the random subset. You can express this parameter as a number (e.g. 10) or a percentage (e.g. 17%).|
|expression||Expression describing the time series that you want to filter.|
random() filtering function returns the specified number of time series chosen randomly from the time series described by the expression. Repeated calls display different random subsets.
random() value generator returns a random value between 0.0 and 1.0 for every point in time on a chart. Repeated calls display different random values at each point.
The following example chart shows 3 of the
~sample.cpu.loadavg.1m time series, picked randomly. Notice how the sources that were selected are not related.