[Simon Lloyd]

So you're on a Virtual Private Server, it's a little better than shared hosting, however, considering that you are using most of your ram and page swap and that the forum isn't in use, i'd say either your setup is wrong or you have added some mods....etc that are draining your resources already, when you go in to production mode you will most likely suffer from the server getting overloaded as the processor will have to handle tasks in and out of the hard drive to compensate for the lack of ram...etc.