Shell script to notify us when a particular background process reaches a certain threshold

Script

#!/bin/bash
# Syntax to run this script
# ./running_process.sh oracle 100 170
# ./running_process.sh PROCESS_NAME WARNING CRITICAL
export MAILIST='dba@dbagenesis.com,
process_name=$1
_limit1=$2
_limit2=$3
_proc=`ps -ef | grep $process_name | wc -l`
if [ "$_proc" -ge "$_limit2" ]
 then
echo "Current Running $process_name Proccess is running too high $_proc " > /tmp/proc.log
cat /tmp/proc.log
cat /tmp/proc.log | mailx -s "${TODAY} - Current Running $process_name Proccess is running too high/Critical $_proc " ${MAILIST}
else
if [ "$_proc" -ge "$_limit1" ]
 then
echo "Current Running $process_name Proccess is running more than expected $_proc " > /tmp/proc.log
cat /tmp/proc.log
cat /tmp/proc.log | mailx -s "${TODAY} - Current Running $process_name Proccess is running more than expected $_proc  " ${MAILIST}
fi
fi