Memory test

I am still in the setup and testing phase with Hobbit. I am running 4.0.4 on a Suse 9.0 Linux box and monitoring about 125 hosts currently. I have run into a few issues, but overall, the installation has been extremely easy.

I am trying to figure out how to get the memory column and associated graphs to show up. Do I need to add an external to do this, or is this functionality built into Hobbit?

Thanks!