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fix: widen histogram buckets to resolve sub-5ms latency

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Default prometheus.DefBuckets bottoms out at 5ms, which made every
route's p95 collapse to 4.75ms (histogram_quantile interpolation
within the smallest bucket). Custom buckets from 100µs to 5s now
distinguish microsecond-fast routes (health) from slower ones
(stripe-backed cart endpoints).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
marcusDenslow
2026-04-30 08:44:56 +02:00
parent 67c8a6bafb
commit 31b8e82e47
1 changed files with 1 additions and 1 deletions
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2
api/middleware/metrics.go
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@@ -24,7 +24,7 @@ var (
prometheus.HistogramOpts{
Name: "http_request_duration_seconds",
Help: "HTTP request latency in seconds, labeled by method and route",
Buckets: prometheus.DefBuckets,
Buckets: []float64{.0001, .0005, .001, .0025, .005, .01, .025, .05, .1, .25, .5, 1, 2.5, 5},
},
[]string{"method", "route"},
)