#!/bin/bash
while true
do 
    while read pid mem
    do
       [ -z "${orig[pid]}" ] && orig[pid]=$mem
       if [ $((orig[pid]*2)) -lt $mem ]
       then
           echo "$pid has grown from ${orig[pid]} to $mem"
       fi
    done  < <(ps -elf | awk '/[p]rocess1|[p]rocess2|[p]rocess3/{print $4 " " $10}')
    sleep 5
done