document the specific boundaries

elastic · Aug 23, 2023 · 2228d0d · 2228d0d
1 parent 5febde7
commit 2228d0d
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/internal/telemetry/metric_exporter_config.go b/internal/telemetry/metric_exporter_config.go
@@ -23,6 +23,8 @@ import (
 	"go.opentelemetry.io/otel/sdk/metric/metricdata"
 )
 
+// Override default otel/prometheus boundaries, as we skip empty buckets and therefore able to use more accurate and higher range boundaries.
+// See https://github.com/elastic/apm/blob/5791498e9569ef9111615ef439e1cbf0b7fd7c18/specs/agents/metrics-otel.md#histogram-aggregation
 var customHistogramBoundaries = []float64{
 	0.00390625, 0.00552427, 0.0078125, 0.0110485, 0.015625, 0.0220971, 0.03125,
 	0.0441942, 0.0625, 0.0883883, 0.125, 0.176777, 0.25, 0.353553, 0.5, 0.707107,