HTTPD:
ps -ylC httpd | awk '{x += $8;y += 1} END {print "Apache Memory Usage (MB): "x/1024; print "Average Proccess Size (MB): "x/((y-1)*1024)}';
NGINX:
ps -ylC nginx | awk '{x += $8;y += 1} END {print "Nginx Memory Usage (MB): "x/1024; print "Average Proccess Size (MB): "x/((y-1)*1024)}';
MYSQL:
ps -ylC mysqld | awk '{x += $8;y += 1} END {print "mySQL Memory Usage (MB): "x/1024; print "Average Proccess Size (MB): "x/((y-1)*1024)}';