Test the memory usage in a summary, in Ubuntu

memoryusage.sh

#!/bin/bash
echo "---- APACHE ----"
ps -ylC apache2 | awk '{x += $8;y += 1} END {print "Total Memory Usage (MB): "x/1024; print "Average Proccess Size (MB): "x/((y-1)*1024)}'
echo "---- JBOSS  ----"
ps -ylC java | awk '{x += $8;y += 1} END {print "Total Memory Usage (MB): "x/1024; print "Average Proccess Size (MB): "x/((y-1)*1024)}'
echo "-- POSTGRESQL --"
ps -ylC postgres | awk '{x += $8;y += 1} END {print "Total Memory Usage (MB): "x/1024; print "Average Proccess Size (MB): "x/((y-1)*1024)}'