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- #!/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/redhat_transparent_hugepage ]; then
- thp_path=/sys/kernel/mm/redhat_transparent_hugepage
- else
- return 0
- fi
- echo 'never' > ${thp_path}/enabled
- echo 'never' > ${thp_path}/defrag
- re='^[0-1]+$'
- 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
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