| 68 | ) |
| 69 | |
| 70 | func newHistogram(name string, buckets []float64, lifecycler Limiter, traceIDLabelName string, externalLabels map[string]string, staleDuration time.Duration) *histogram { |
| 71 | if traceIDLabelName == "" { |
| 72 | traceIDLabelName = "traceID" |
| 73 | } |
| 74 | |
| 75 | // add +Inf bucket |
| 76 | buckets = append(buckets, math.Inf(1)) |
| 77 | |
| 78 | bucketLabels := make([]string, len(buckets)) |
| 79 | for i, bucket := range buckets { |
| 80 | bucketLabels[i] = formatFloat(bucket) |
| 81 | } |
| 82 | |
| 83 | return &histogram{ |
| 84 | metricName: name, |
| 85 | nameCount: fmt.Sprintf("%s_count", name), |
| 86 | nameSum: fmt.Sprintf("%s_sum", name), |
| 87 | nameBucket: fmt.Sprintf("%s_bucket", name), |
| 88 | buckets: buckets, |
| 89 | bucketLabels: bucketLabels, |
| 90 | series: make(map[uint64]*histogramSeries), |
| 91 | seriesDemand: NewCardinality(staleDuration, removeStaleSeriesInterval), |
| 92 | lifecycler: lifecycler, |
| 93 | traceIDLabelName: traceIDLabelName, |
| 94 | externalLabels: externalLabels, |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | func (h *histogram) ObserveWithExemplar(lbls labels.Labels, value float64, traceID string, multiplier float64) { |
| 99 | hash := lbls.Hash() |