vboxballoonctrl --version (return code: 0)
5.0.18r106667
vboxballoonctrl --help (return code: 0)
--balloon-dec Sets the ballooning decrement in MB (128 MB).
--balloon-groups Sets the VM groups for ballooning (all).
--balloon-inc Sets the ballooning increment in MB (256 MB).
--balloon-interval Sets the check interval in ms (30 seconds).
--balloon-lower-limit Sets the ballooning lower limit in MB (64 MB).
--balloon-max Sets the balloon maximum limit in MB (0 MB).
Specifying "0" means disabled ballooning.
Set "VBoxInternal/Guest/BalloonSizeMax" for a per-VM maximum ballooning size.
--balloon-safety-margin Free memory when deflating a balloon in MB (1024 MB).
--apimon-groups Sets the VM groups for monitoring (all),
comma-separated list.
--apimon-isln-response Sets the isolation response to one of:
none, pause, poweroff, save, shutdown
(none).
--apimon-isln-timeout Sets the isolation timeout in ms (30s).
--apimon-resp-timeout Sets the response timeout in ms (30s).