Process Memory consumption - Linux

psmem

#!/bin/bash

#############################################
# Process Memory consumption                #
#                                           #
# Usage: psmem <process_name> [<user_grep>] #
#        psmem nginx                        #
#        psmem php5-fpm www-data            #
#                                           #
# Author: Dumitru Uzun (DUzun.me)           #
#############################################

p=$1
g=$2
h=rss # cmd
[ ! -z "$g" ] && h=$h,user

list() {
    if [ -z "$g" ]; then
        ps --no-headers -o "$h" -C $p
    else
        ps --no-headers -o "$h" -C $p | grep $g
    fi
}

c=`list | wc -l`
echo -n \"$1\" "RAM: "
if [ "$c" -gt 0 ]; then
    echo -n `list | awk '{ sum+=$1 } END { printf ("%s%d%s", "~", sum/NR/1024,"M") }'` x$c" = "
    echo `list | awk '{ sum+=$1 } END { printf ("%d%s", sum/1024,"M") }'`
else
    echo none
fi