apache-mysql-restarter

#!/bin/bash

threshold=80 # percent
total=$(free | grep "Mem:" | awk '{print $2}')
remaining=$(free | grep "buffers" | awk '{print $4}' | tail -n 1)
current=$(echo "scale=0;100-$remaining * 100 / $total" | bc -l)

if [ $current -gt $threshold ]
then
  /etc/init.d/httpd stop
  /etc/init.d/mysqld restart
  /etc/init.d/httpd start

  echo "RAM utilization at {current}% on `date +'%Y-%m-%d %H:%M:%S'`. Restarted apache and mysql." \
  >> /var/log/apache_mysql_restarter.log
else
  echo "RAM utilization at {current}% on `date +'%Y-%m-%d %H:%M:%S'`." \
  >> /var/log/apache_mysql_restarter.log