Disable Transparent Huge Pages (THP) — MongoDB

#Centos , Redhat

vi /etc/init.d/disable-transparent-hugepages

 

#!/bin/bash

### BEGIN INIT INFO

# Provides: disable-transparent-hugepages

# Required-Start: $local_fs

# Required-Stop:

# X-Start-Before: mongod mongodb-mms-automation-agent

# Default-Start: 2 3 4 5

# Default-Stop: 0 1 6

# Short-Description: Disable Linux transparent huge pages

# Description: Disable Linux transparent huge pages, to improve

# database performance.

### END INIT INFO

 

case $1 in

start)

if [ -d /sys/kernel/mm/transparent_hugepage ]; then

thp_path=/sys/kernel/mm/transparent_hugepage

elif [ -d /sys/kernel/mm/transparent_hugepage ]; then

thp_path=/sys/kernel/mm/transparent_hugepage

else

return 0

fi

 

echo 'never' > ${thp_path}/enabled

echo 'never' > ${thp_path}/defrag

 

re='^[0-1]+$'

if [[ $(cat ${thp_path}/khugepaged/defrag) =~ $re ]]

then

# RHEL 7

echo 0 > ${thp_path}/khugepaged/defrag

else

# RHEL 6

echo 'no' > ${thp_path}/khugepaged/defrag

fi

 

unset re

unset thp_path

;;

esac

####################

chmod 755 /etc/init.d/disable-transparent-hugepages

chkconfig --add disable-transparent-hugepages

chkconfig disable-transparent-hugepages on