I am using a very nice little php script called "vpsinfo" from LabradorData. It shows me everything I care for my VPS. For example oomguarpages, privvmpages, disk usage, network connections, process tree, mysql status and a lot more.
Here is my my vpsinfo page for example:
http://www.itamsdemo.com/myvpsinfo/And here is vpsinfo website:
http://www.labradordata.ca/home/13A little tip on VPS admin: watch close to your privvmpages which is the burstable memory you used. You should always keep this number under 544MB (the VPS resource limit) otherwise your system will hang up!