Merge pull request #112939 from lengrongfu/feat/update_preemption_victims_metric

feat: update preemption victims metric

pkg/scheduler/metrics/metrics.go

@@ -77,8 +77,8 @@ var (
 			Subsystem: SchedulerSubsystem,
 			Name:      "preemption_victims",
 			Help:      "Number of selected preemption victims",
-			// we think #victims>50 is pretty rare, therefore [50, +Inf) is considered a single bucket.
-			Buckets:        metrics.LinearBuckets(5, 5, 10),
+			// we think #victims>64 is pretty rare, therefore [64, +Inf) is considered a single bucket.
+			Buckets:        metrics.ExponentialBuckets(1, 2, 7),
 			StabilityLevel: metrics.STABLE,
 		})
 	PreemptionAttempts = metrics.NewCounter(

test/instrumentation/testdata/stable-metrics-list.yaml

@@ -88,16 +88,13 @@
   type: Histogram
   stabilityLevel: STABLE
   buckets:
-  - 5
-  - 10
-  - 15
-  - 20
-  - 25
-  - 30
-  - 35
-  - 40
-  - 45
-  - 50
+  - 1
+  - 2
+  - 4
+  - 8
+  - 16
+  - 32
+  - 64
 - name: queue_incoming_pods_total
   subsystem: scheduler
   help: Number of pods added to scheduling queues by event and queue type.