Why Does Compute Resource Have RAM in Use When There Are No VSs on It

There are a couple of services that are always running on a compute resource, so they will use up RAM. If you are running Integrated Storage, then you will have a storage controller running on your compute resource. This controller will be using a portion of the RAM, generally about 2 GB or more, depending on your settings. The OnApp system also has a checking system that is constantly running, using SNMP.