[nick.polites]

Just a warning on having the database and reports on the same server. You're going to have conflict of ports when installing reports after the database is installed. You are going to have to change a few configuration ports as the installer doesn't know what ports are open. I would personally put leave the database as a standalone and put the reports either with the app or web tier.

The JVM is initialized as one user and does not need to be modified once the application is up and running. If you tweak any parameters, it will require a restart of the application.