1. How do I install the Administration web app?

If you install Tomcat 5.5 binaries, the Administration web app is not bundled with it; this describes how to add the Administration web app to your Tomcat 5.5 installation. (Tomcat 4.1 comes with the Administration web app as part of the binary).

Determining the various causes of memory errors

There are different kinds of memory limits inside the Java Virtual Machine. Each limit can be configured independently. But you must first find out which limit you have reached.