Description:

This Multi-Processing Module (MPM) implements a non-threaded, pre-forking web
server that handles requests in a manner similar to Apache 1.3. It is
appropriate for sites that need to avoid threading for compatibility with
non-thread-safe libraries. It is also the best MPM for isolating each request,
so that a problem with a single request will not affect any other.

This MPM is very self-regulating, so it is rarely necessary to adjust its
configuration directives. Most important is that MaxClients be big enough to
handle as many simultaneous requests as you expect to receive, but small enough
to assure that there is enough physical RAM for all processes.

Check for available Apache modules here: http://nux.se/apache/