A queue is: * An arrival rate of requests * A processing time for each request * A corresponding queue length when a new request comes in before the current on

A queue is: * An arrival rate of requests * A processing time for each request * A corresponding queue length when a new request comes in before the current one is done being processed. So anything that affects processing time affects queueing. Cache hit rates, data packing, etc., all affect processing time, but processing time is in the context of a queue.