feat(backend): use fewer histogram buckets for request latency

Default buckets cover up to 10 seconds, which is unnecessarily wide
prymitive · Sep 25, 2020 · 6b51191 · 6b51191
1 parent 651dd6f
commit 6b51191
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/cmd/karma/exporter.go b/cmd/karma/exporter.go
@@ -23,8 +23,9 @@ var (
 
 	reqDuration = prometheus.NewHistogramVec(
 		prometheus.HistogramOpts{
-			Name: "http_request_duration_seconds",
-			Help: "HTTP request latencies in seconds.",
+			Name:    "http_request_duration_seconds",
+			Help:    "HTTP request latencies in seconds.",
+			Buckets: []float64{0.005, 0.01, 0.025, 0.05, 0.1, 0.25, 0.5}, // prometheus.DefBuckets, but cut off at 0.5 instead of 10 sec
 		}, labels,
 	)