Scheduler Metrics

Metric Name	Type	Components	Purpose
scheduler_schedule_attempts_total	Counter	Scheduler	Scheduling outcomes (result=scheduled/unschedulable/error).
scheduler_pending_pods	Gauge	Scheduler	Pods in scheduler queues (activeQ/backoffQ/unschedulable).
scheduler_scheduling_attempt_duration_seconds	Histogram	Scheduler	End-to-end scheduling latency per attempt.
scheduler_pod_scheduling_attempts	Histogram	Scheduler	Successful scheduling attempts per pod.
scheduler_queue_incoming_pods_total	Counter	Scheduler	Pods entering the scheduling pipeline.
scheduler_plugin_evaluation_total	Counter	Scheduler	Plugin evaluation calls.
scheduler_framework_extension_point_duration_seconds	Histogram	Scheduler	Extension point latency (Filter/Score/Bind).
scheduler_plugin_execution_duration_seconds	Histogram	Scheduler	Per-plugin execution latency (NodeResourcesFit etc.).
scheduler_inflight_events	Gauge	Scheduler	Inflight scheduling events.
scheduler_cache_size	Gauge	Scheduler	Scheduler cache entries (nodes/pods/assumed).
scheduler_goroutines	Gauge	Scheduler	Goroutine count.
scheduler_preemption_attempts_total	Counter	Scheduler	Preemption attempts.
scheduler_unschedulable_pods	Gauge	Scheduler	Not emitted when 0 unschedulable pods exist.