Hello, we are running Tomcat 5.5.20 on a Windows Server 2003. We are adding a new server to the one we already have and the server admin want to enable hyper-threading. Researching this issue there does not seem to be a consensus. Some people say it slows their app down; others seem to think it does not. I am going to see how it affects our performance before we add the server and I was just looking for anyone that wants to share their experiences with hyper-threading. Thanks!