performance problem with Tomcat

[Chang Song]

Hi, folks.

I have been testing nginx with Tomcat backend server, and I was  
disappointed
with the result. 30-40% worse than apache front web server setup.
I think the culprit of the performance problem is the absence of  
persistent
connection (KeepAlive HTTP/1.1) to Tomcat like Apache's AJP connection.

Does anyone has the same problem?
Anyone with a good solution?

Thank you.

Chang