DerivativeNode

stream
  |from()
    .measurement('net_rx_packets')
  |derivative('value')
    .unit(1s) // default
    .nonNegative()
  ...

derivative.as(value string)

derivative.nonNegative()

derivative.quiet()

derivative.unit(value time.Duration)

derivative|alert()

derivative|barrier()

derivative|bottom(num int64, field string, fieldsAndTags ...string)

derivative|changeDetect(field string)

derivative|combine(expressions ...ast.LambdaNode)

derivative|count(field string)

derivative|cumulativeSum(field string)

    var data = stream
        |from()...
    // Trigger critical alert if the throughput drops below 100 points per 10s and checked every 10s.
    data
        |deadman(100.0, 10s)
    //Do normal processing of data
    data...

    var data = stream
        |from()...
    // Trigger critical alert if the throughput drops below 100 points per 10s and checked every 10s.
    data
        |stats(10s)
            .align()
        |derivative('emitted')
            .unit(10s)
            .nonNegative()
        |alert()
            .id('node \'stream0\' in task \'{{ .TaskName }}\'')
            .message('{{ .ID }} is {{ if eq .Level "OK" }}alive{{ else }}dead{{ end }}: {{ index .Fields "emitted" | printf "%0.3f" }} points/10s.')
            .crit(lambda: "emitted" <= 100.0)
    //Do normal processing of data
    data...

    var data = stream
        |from()...
    // Trigger critical alert if the throughput drops below 100 points per 10s and checked every 10s.
    data
        |deadman(100.0, 10s)
            .slack()
            .channel('#dead_tasks')
    //Do normal processing of data
    data...

    var data = stream
        |from()...
    // Trigger critical alert if the throughput drops below 100 points per 10s and checked every 10s.
    // Only trigger the alert if the time of day is between 8am-5pm.
    data
        |deadman(100.0, 10s, lambda: hour("time") >= 8 AND hour("time") <= 17)
    //Do normal processing of data
    data...

derivative|deadman(threshold float64, interval time.Duration, expr ...ast.LambdaNode)

derivative|default()

derivative|delete()

derivative|derivative(field string)

derivative|difference(field string)

derivative|distinct(field string)

derivative|ec2Autoscale()

derivative|elapsed(field string, unit time.Duration)

derivative|eval(expressions ...ast.LambdaNode)

derivative|first(field string)

derivative|flatten()

    |groupBy(*)

derivative|groupBy(tag ...interface{})

derivative|holtWinters(field string, h int64, m int64, interval time.Duration)

derivative|holtWintersWithFit(field string, h int64, m int64, interval time.Duration)

derivative|httpOut(endpoint string)

derivative|httpPost(url ...string)

derivative|influxDBOut()

derivative|join(others ...Node)

derivative|k8sAutoscale()

derivative|kapacitorLoopback()

derivative|last(field string)

derivative|log()

derivative|max(field string)

derivative|mean(field string)

derivative|median(field string)

derivative|min(field string)

derivative|mode(field string)

derivative|movingAverage(field string, window int64)

derivative|percentile(field string, percentile float64)

derivative|sample(rate interface{})

derivative|shift(shift time.Duration)

derivative|sideload()

derivative|spread(field string)

derivative|stateCount(expression ast.LambdaNode)

derivative|stateDuration(expression ast.LambdaNode)

derivative|stats(interval time.Duration)

derivative|stddev(field string)

derivative|sum(field string)

derivative|swarmAutoscale()

derivative|top(num int64, field string, fieldsAndTags ...string)

derivative|trickle()

derivative|union(node ...Node)

derivative|where(expression ast.LambdaNode)

derivative|window()