he application is running.  In
      particular, most operating systems cannot efficiently handle
      more than <code>100</code> or <code>200</code> threads running
      concurrently.  Hence performance often degrades sharply as the
      number of connections increases over those numbers.
    </p>

    <p>
      Other concurrency models are further discussed in the
      <i><a href="#server_scalability">Optimizing Server
	  Scalability</a></i> section below.
    </p>

    <p><hr><p>

    <a name="scalab