StateCountNode

stream
  |from()
    .measurement('cpu')
  |where(lambda: "cpu" == 'cpu-total')
  |groupBy('host')
  |stateCount(lambda: "usage_idle" <= 10)
  |alert()
    // Warn after 1 point
    .warn(lambda: "state_count" >= 1)
    // Critical after 5 points
    .crit(lambda: "state_count" >= 5)

stateCount.as(value string)

stateCount.quiet()

stateCount|alert()

stateCount|barrier()

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

stateCount|changeDetect(field string)

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

stateCount|count(field string)

stateCount|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...

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

stateCount|default()

stateCount|delete()

stateCount|derivative(field string)

stateCount|difference(field string)

stateCount|distinct(field string)

stateCount|ec2Autoscale()

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

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

stateCount|first(field string)

stateCount|flatten()

    |groupBy(*)

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

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

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

stateCount|httpOut(endpoint string)

stateCount|httpPost(url ...string)

stateCount|influxDBOut()

stateCount|join(others ...Node)

stateCount|k8sAutoscale()

stateCount|kapacitorLoopback()

stateCount|last(field string)

stateCount|log()

stateCount|max(field string)

stateCount|mean(field string)

stateCount|median(field string)

stateCount|min(field string)

stateCount|mode(field string)

stateCount|movingAverage(field string, window int64)

stateCount|percentile(field string, percentile float64)

stateCount|sample(rate interface{})

stateCount|shift(shift time.Duration)

stateCount|sideload()

stateCount|spread(field string)

stateCount|stateCount(expression ast.LambdaNode)

stateCount|stateDuration(expression ast.LambdaNode)

stateCount|stats(interval time.Duration)

stateCount|stddev(field string)

stateCount|sum(field string)

stateCount|swarmAutoscale()

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

stateCount|trickle()

stateCount|union(node ...Node)

stateCount|where(expression ast.LambdaNode)

stateCount|window()