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https://issues.apache.org/jira/browse/AMBARI-5973?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14218051#comment-14218051
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Jeff Sposetti commented on AMBARI-5973:
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Hi, This change only added the host check and does not automatically turn
off/disable. It is still up to the user to decide if they want to ignore the
check or turn off THP on their own before proceeding.
> Usability: Add checks for THP to the Ambari pre-req check for Linux
> -------------------------------------------------------------------
>
> Key: AMBARI-5973
> URL: https://issues.apache.org/jira/browse/AMBARI-5973
> Project: Ambari
> Issue Type: Bug
> Reporter: Andrew Onischuk
> Assignee: Andrew Onischuk
> Fix For: 1.7.0
>
>
> We need to add checks for Transparent Huge Page. With it enabled, we have
> pretty horrible performance, and it's enabled by default on RHEL.
> Reference: <https://access.redhat.com/site/documentation/en-
> US/Red_Hat_Enterprise_Linux/6/html/Performance_Tuning_Guide/s-memory-
> transhuge.html>
> What we need to do pseudo code:
> if (`cat /sys/kernel/mm/redhat_transparent_hugepage/enabled` != 'never');
> then
> echo never > /sys/kernel/mm/redhat_transparent_hugepage/enabled
> end
> We need to add a check, and then add the 'echo never' to the python script.
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