User counts are really active threads. As part of the incremental updates, I’ll have thread state, and then I can count users actively streaming songs. So that will get fixed as part of the incremental update ticket.
If the user count keeps going up, then the threads aren’t terminating right. What version of pthreads do you have? Are you using nptl or linux pthreads? And are you transcoding, or just serving native songs?