Add memory consumption to benchmarks

[benstadin]

My application uses several queues. The application is a service and thus runs for a long time. Each of the queues in my application may get heavily filled at peak times, but most of the queues will be empty and idle most of the time.

Now I want to reduce the overall memory usage of my application and therefore I'm interested in which of the queues and configuration options allow to at least partially deallocate when the queue shrinks.

Which of the queues would you suggest for this scenario? It would be nice to have some numbers for certain fill rates and after shrinking as part of the benchmark suite.