Disable THP on CentOS 6

Datetime:2016-08-22 23:44:37          Topic: Centos           Share

by admin · Published · Updated

For the impatient

Disable Transparent Huge Pages on CentOS 6

During Runtime

echo never > /sys/kernel/mm/redhat_transparent_hugepage/enabled
echo never > /sys/kernel/mm/redhat_transparent_hugepage/defrag

Surviving reboot

  1. sudo vi /etc/init.d/disable-transparent-hugepages
  2. #!/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 INFOcase $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
  3. sudo chmod 755 /etc/init.d/disable-transparent-hugepages
  4. sudo chkconfig --add disable-transparent-hugepages




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