disabling transparent hugepage for MongoDB on Ubuntu

rc.local

#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

mongo_restart=0
if test -f /sys/kernel/mm/transparent_hugepage/enabled; then
   mongo_restart=1
   echo never > /sys/kernel/mm/transparent_hugepage/enabled
fi
if test -f /sys/kernel/mm/transparent_hugepage/defrag; then
   mongo_restart=1
   echo never > /sys/kernel/mm/transparent_hugepage/defrag
fi
if [ "$mongo_restart" = 1 ]; then
   service mongod restart
fi

exit 0