increase queue duration histogram bucket

Signed-off-by: Ben Ye <[email protected]>

Author: yeya24

CHANGELOG.md

@@ -5,6 +5,7 @@
 * [ENHANCEMENT] Querier: limit series query to only ingesters if `start` param is not specified. #4976
 * [ENHANCEMENT] Query-frontend/scheduler: add a new limit `frontend.max-outstanding-requests-per-tenant` for configuring queue size per tenant. Started deprecating two flags `-query-scheduler.max-outstanding-requests-per-tenant` and `-querier.max-outstanding-requests-per-tenant`, and change their value default to 0. Now if both the old flag and new flag are specified, the old flag's queue size will be picked. #5005
 * [ENHANCEMENT] Query-tee: Add `/api/v1/query_exemplars` API endpoint support. #5010
+* [ENHANCEMENT] Query Frontend/Query Scheduler: Increase upper bound to 60s for queue duration histogram metric. #5029
 * [FEATURE] Querier/Query Frontend: support Prometheus /api/v1/status/buildinfo API. #4978
 * [FEATURE] Ingester: Add active series to all_user_stats page. #4972
 * [FEATURE] Ingester: Added `-blocks-storage.tsdb.head-chunks-write-queue-size` allowing to configure the size of the in-memory queue used before flushing chunks to the disk . #5000

pkg/frontend/v1/frontend.go

@@ -108,7 +108,7 @@ func New(cfg Config, limits Limits, log log.Logger, registerer prometheus.Regist
 		queueDuration: promauto.With(registerer).NewHistogram(prometheus.HistogramOpts{
 			Name:    "cortex_query_frontend_queue_duration_seconds",
 			Help:    "Time spend by requests queued.",
-			Buckets: prometheus.DefBuckets,
+			Buckets: []float64{.005, .01, .025, .05, .1, .25, .5, 1, 2.5, 5, 10, 20, 30, 60},
 		}),
 	}
 

pkg/scheduler/scheduler.go

@@ -116,7 +116,7 @@ func NewScheduler(cfg Config, limits Limits, log log.Logger, registerer promethe
 	s.queueDuration = promauto.With(registerer).NewHistogram(prometheus.HistogramOpts{
 		Name:    "cortex_query_scheduler_queue_duration_seconds",
 		Help:    "Time spend by requests in queue before getting picked up by a querier.",
-		Buckets: prometheus.DefBuckets,
+		Buckets: []float64{.005, .01, .025, .05, .1, .25, .5, 1, 2.5, 5, 10, 20, 30, 60},
 	})
 	s.connectedQuerierClients = promauto.With(registerer).NewGaugeFunc(prometheus.GaugeOpts{
 		Name: "cortex_query_scheduler_connected_querier_clients",