Although the Oracle UEK3 kernel supports huge pages over 1 GB in size, a hardware virtualized guest running Oracle Linux with UEK3 installed may not recognize that 1 GB huge pages are supported, and the following error is displayed in the dmesg log:
hugepagesz: Unsupported page size 1024 M Initializing cgroup subsys hugetlb HugeTLB registered 2 MB page size, pre-allocated 2 pages
Workaround: A workaround has been published by Oracle support at:
https://support.us.oracle.com/oip/faces/secure/km/DocumentDisplay.jspx?id=1670223.1
Bug 17299364