Caleb Epstein wrote:

You can make a thread non-joinable, in which case it will automatically clean up after itself, by deleting the heap-allocated thread objects you create. The thread will continue to run, but it will become "detached" and you won't face this resource issue on thread exit.

I would have never thought of that, sounds dangerous! I tried it and it seems to work though. Is that pretty safe? Specifically, I'm spawning my threads like this: boost::thread *ptr = thrds.create_thread(boost::bind (threadfunc, totalthreads, xx+1)); delete ptr; (where thrds is a thread group) My sample prog has made over 300,000 threads so far with this method, so it seems pretty stable. Tim