Lighttpd

#!rst

server.max-connections option
=============================

server.max-connections

   Provides fine tuning for request handling.

   max-connections == max-fds/2 (maybe /3)

   As in, if you want to support 2048 concurrent connections, you may also want to set server.max-fds = 4096 (or 6144).  

   Why more file handles than connections?  The other file handles are used for fastcgi and/or files.

   Default:
   ::

     server.max-connections = 1024