Transparent Huge Pages

Disable Transparent Hugepages on SLES11, RHEL6, RHEL7, OL6, OL7 and UEK2 Kernels

This blog post is not related to database upgrades and migrations. But still I think it is very useful for many customers operating on modern Linux systems.

Recommendation 

Support just published an ALERT strongly recommending to disable Transparent Hugepages on Linux systems. And the below information does not apply to RAC systems only but also to single instance environments.

Which Linux Distrubutions/Kernels are affected? 

  • SLES11
  • RHEL6 and RHEL7
  • OL6 and OL7
  • UEK2 Kernels

What are the Issues? 

I’m quoting MOS Note: 1557478.1 (ALERT: Disable Transparent HugePages on SLES11, RHEL6, RHEL7, OL6, OL7 and UEK2 Kernels):

Because Transparent HugePages are

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