How to check memory used by process

Shell Script to check Memory usage by Process  in linux

#!/bin/bash

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# To check memory used by particular process

#Created by Shankar Patel

#Create date : 1-11-2012

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if [ "$1" = "" ] ; then  echo -e "Please Provide process name as a argument . \nExample: $0 java" ; exit 1;fi 

pidsof_procs=`pidof $1`

for i in $pidsof_procs

do

        mem[$i]="`cat /proc/$i/status | awk '/VmPeak/ {print $2}'`"

        #cat /proc/$i/status | awk '/VmPeak/ {print $2}'

done

for i in $pidsof_procs

do

        echo -e "$i is using $((${mem[i]}/1024)) mb"

done

exit 0