mem.gplot

set title "Memory Utilization"
set ylabel "MB"
plot \
    datafile using 3:($5/1024) title 'Used' with filledcurves x1, \
    datafile using 3:($5/1024) notitle with lines lc rgb "#000000" lw 1, \
    datafile using 3:(($5 - $7 - $8)/1024) title 'Really Used' with filledcurves x1, \
    datafile using 3:(($5 - $7 - $8)/1024) notitle with lines lc rgb "#000000" lw 1