From http://tomcat.apache.org/tomcat-5.5-doc/apr.html

When APR is enabled, the HTTP connector will use sendfile for hadling large static files (all such files will be sent ansychronously using high performance kernel level calls), and will use a socket poller for keepalive, increasing scalability of the server.

On Linux, epoll is used if available.

Regards

Andrew


Caldarale, Charles R wrote:
From: Leon Rosenberg [mailto:[EMAIL PROTECTED] Subject: Re: Tool for monitoring Tomcat from the client side

This slightly besser performance, is it achieved by C or by using epoll?

Good question, and I don't know the answer.  It would be interesting to
see if there's any performance difference by recoding the pure Java
request handler in Tomcat to use NIO and its polling capability.  Any
volunteers?


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