Ubuntu -- Fix -- Disable Transparent Huge Pages (THP)

disable_transparent_huge_pages.md

Disable Transparent Huge Pages (THP)

1. Create the disable-transparent-hugepages file at /etc/init.d/disable-transparent-hugepages with the following content:

#!/bin/sh
### 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/redhat_transparent_hugepage ]; then
      thp_path=/sys/kernel/mm/redhat_transparent_hugepage
    else
      return 0
    fi

    echo 'never' > ${thp_path}/enabled
    echo 'never' > ${thp_path}/defrag

    unset thp_path
    ;;
esac

2. Make it executable.

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

3. Configure your operating system to run it on boot.

sudo update-rc.d disable-transparent-hugepages defaults