Queues tend to be always full or always empty (see queueing theory). There is no steady state with a half full queue. For NVMe in particular you will have a ha

Queues tend to be always full or always empty (see queueing theory). There is no steady state with a half full queue. For NVMe in particular you will have a hard time filling their queues. Your perceived performance is mostly latency, as there is hardly an application that can submit enough concurrent requests.