StatsNode

var data = stream
  |from()...
// Emit statistics every 1 minute and cache them via the HTTP API.
data
  |stats(1m)
  |httpOut('stats')
// Continue normal processing of the data stream
data...

stats.align()

stats.quiet()

stats|alert()

stats|barrier()

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

stats|changeDetect(field string)

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

stats|count(field string)

stats|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...

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

stats|default()

stats|delete()

stats|derivative(field string)

stats|difference(field string)

stats|distinct(field string)

stats|ec2Autoscale()

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

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

stats|first(field string)

stats|flatten()

    |groupBy(*)

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

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

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

stats|httpOut(endpoint string)

stats|httpPost(url ...string)

stats|influxDBOut()

stats|join(others ...Node)

stats|k8sAutoscale()

stats|kapacitorLoopback()

stats|last(field string)

stats|log()

stats|max(field string)

stats|mean(field string)

stats|median(field string)

stats|min(field string)

stats|mode(field string)

stats|movingAverage(field string, window int64)

stats|percentile(field string, percentile float64)

stats|sample(rate interface{})

stats|shift(shift time.Duration)

stats|sideload()

stats|spread(field string)

stats|stateCount(expression ast.LambdaNode)

stats|stateDuration(expression ast.LambdaNode)

stats|stats(interval time.Duration)

stats|stddev(field string)

stats|sum(field string)

stats|swarmAutoscale()

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

stats|trickle()

stats|union(node ...Node)

stats|where(expression ast.LambdaNode)

stats|window()