api.Histogram

api.Histogram API schema defining 4 fields, including bounds, bucket counts, count, and 1 more.

boundsnumber[]

Bounds are the explicit upper bounds (le), ascending.

bucket_countsinteger[]

BucketCounts are the per-bucket counts; len == len(Bounds)+1, where the final entry is the +Inf overflow bucket. NOTE: these are OTel DELTA (non-cumulative) per-bucket counts. A Prometheus _bucket{le} series / PromQL histogram_quantile needs CUMULATIVE counts, so a remote-write must ascending-cumsum them first. The counts are consistent with Count (sum(BucketCounts) == Count).

countinteger

sumnumber

seconds for durations

api.Histogram

{
  "bounds": [
    0
  ],
  "bucket_counts": [
    0
  ],
  "count": 0,
  "sum": 0
}