Target[memory_usage]: `/etc/memstat.sh`
Title[memory_usage]: Memory usage (GB)
PageTop[memory_usage]: <H1>Memory usage (GB)</H1>
Options[memory_usage]: growright,nobanner,gauge,noinfo,nopercent
ShortLegend[memory_usage]:  
kMG[memory_usage]: G
MaxBytes[memory_usage]: 8
AbsMax[memory_usage]: 8
YLegend[memory_usage]: Mem total/free
Unscaled[memory_usage]: ymwd
LegendI[memory_usage]: total
LegendO[memory_usage]: free
Suppress[memory_usage]: y

#!/bin/sh
DATA=`top -b -n 1 | grep Mem`
TOTAL=`echo $DATA | cut -f2 -d" " | cut -f1 -d"M"`
FREE=`echo $DATA | cut -f6 -d" " | cut -f1 -d"M"`
echo $TOTAL
echo $FREE
echo 0
echo 0