MaxClients in httpd.conf reduces your total server performance in case you
have not only db-actions but also images and plain files ...
if you use something other than ocilogon you open a persistant link that
might not be closed. (try using ocilogon instead of eg ociplogon)
close every connectio
Are you useing persistent connections (I had no real luck with them)?
How do you connect to your DB over Multi Threaded Server (MTS) or Dedicated
Server ?
I think Oracles NET8 Config has a Parameter to limit this.
Check out the MasterIndex at
http://technet.oracle.com/doc/server.815/a68826/toc.