Welcome,
Some RAWR templates cause a memory leak with HFS.
Have you tried to do the same test with the default template of HFS ?
The problem is Limit Bandwith Speed (any template, default template too). I Change all parameters one by one. If I active Limit Bandwith speed (Global or per User), the memory increases to hang HFS.
I desactivated this limit and now Run OK. Free Bandwith is not a problem, I have another programs to limit Bandwith to a program o interface.
Thanks a lot (Danny too) for your answers and help.