Backgroundrb devel - Jul 2009 - persistent task queues and thread pools

I have enabled persistent task queues and it is working but I want to limit
how many tasks run based on the thread pool.

The task calls inside my worker

def do_work(id)
    pool_size 2
    thread_pool.defer(:do_ocr, id)
  end

the worker then has do_ocr which contains the actual work to be done.  I
would like the task queue to check on a 1 second time frame so stuff is
processed as fast as possible, but I do not want more than 2 running at a
time.  If I set the persistent_delay to 1 second it launches 1 queued task
each second ignoring the pool_size of 2.  Is there anyway to have the
persistent task queue obey the pool_size limit and react the way I expected
it to act?  Or have the task queue wake and grab x number of tasks out of
the queue at a time as well as obeying the pool_size on a worker by worker
basis?

I''m using the latest git code.
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