Which connector are you using? If you have APR available, AJP should use
the APR connector by default. Do you know if you are using APR/native?
If not, consider trying it, and use sendFile="true". I'm not sure if it
will improve anything because the real problem might be the actual
buffering between Tomcat and httpd.
Unfortunately, we found some odd problems with APR/native a long time
ago and haven't ever gone back to it. I don't have it available for the
systems I need this working on to try
Wireshark should allow you to sniff traffic on localhost.
http://wiki.wireshark.org/CaptureSetup/Loopback
It doesn't work on Windows. I've tried the loopback adapter piece, but
it's quite obnoxious.
What am I saying, Windows is quite obnoxious :)
Andy