readWriteConcurrencyGaugeVec = NewTimingRatioHistogramVec(
		&compbasemetrics.TimingHistogramOpts{
			Namespace: namespace,
			Subsystem: subsystem,
			Name:      "read_vs_write_current_requests",
			Help:      "Observations, at the end of every nanosecond, of the number of requests (as a fraction of the relevant limit) waiting or in regular stage of execution",

- The `priority_level_request_utilization` metric histogram is adjusted so that for the cases where `phase=waiting` the denominator is the cumulative capacity of all of the priority level's queues.