freebsd-dev/release/picobsd/help/vm.hlp.en

vm Show memory usage.
 
This program repeatedly displays current memory usage, showing the
following numbers:
 
* procs: number of processes; r - running, w - waiting for I/O,
l - sleeping, s - swapping
* virt mem: virtual memory amounts (total and active), in kB
* real mem: real memory amounts (total and active), in kB
* shared vm: amount of shared virtual memory (total and active), in kB
* shared real: amount of shared real memory (total and active), in kB
* free: amount of free memory, in kB