Wednesday, January 20, 2016

Transparent HugePages on several Linux kernels should be turned off

Even though the document "ALERT: Disable Transparent HugePages on SLES11, RHEL6, RHEL7, OL6, OL7 and UEK2 Kernels" in note ID 1557478.1 on MOS has been out there for years, it is still good information to have that the Transparent HugePages (not regular HugePages) feature is enabled by default AND that it can cause instability in RAC or non-RAC environments!  Since Oracle recommends turning this off in all your database machines, do you know if it is off in your systems?

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