increase request time bucket label ranges

Author: shunj-nb

metrics/prometheus/prometheus.go

@@ -142,7 +142,7 @@ const (
 
 // NewMetrics initializes a new Prometheus metrics instance with preloaded label values.
 func NewMetrics(cfg config.PrometheusMetrics, disabledMetrics config.DisabledMetrics, syncerKeys []string) *Metrics {
-	standardTimeBuckets := []float64{0.05, 0.1, 0.15, 0.20, 0.25, 0.3, 0.4, 0.5, 0.75, 1}
+	standardTimeBuckets := []float64{0.05, 0.1, 0.15, 0.20, 0.25, 0.3, 0.4, 0.5, 0.75, 1, 2, 3}
 	cacheWriteTimeBuckets := []float64{0.001, 0.002, 0.005, 0.01, 0.025, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 1}
 	priceBuckets := []float64{250, 500, 750, 1000, 1500, 2000, 2500, 3000, 3500, 4000}
 	queuedRequestTimeBuckets := []float64{0, 1, 5, 30, 60, 120, 180, 240, 300}