top show 730MB of RAM used, but the "Task Manager" shows 190MB?
Some more information on my system:
- Lubuntu 14.04
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I believe i found the answer:
To understand the process architecture of VirtualBox see The VirtualBox architecture :
Once you start a virtual machine (VM) from the GUI, you have two windows (the main window and the VM), but three processes running. Looking at your system from Task Manager (on Windows) or some system monitor (on Linux), you will see these:
VirtualBox, the GUI for the main window;
Another VirtualBox process that was started with the -startvm parameter, which means that its GUI process acts as a shell for a VM;
VBoxSVC, the service mentioned above, which is running in the background to keep track of all the processes involved.
This was automatically started by the first GUI process.