I'm finally getting around to working with my SA to implement HugePages.  Did it on two servers yesterday afternoon.  The first went exactly as expected, but the second ... not so much.  Added the necessary line to /etc/sysctl.conf and rebooted, but it still shows zero hugepages.

OS info:

oracle:$ uname -srvLinux 4.1.12-124.28.1.el6uek.x86_64 #2 SMP Mon Jun 3 15:24:03 PDT 2019

Contents of /etc/sysctl.conf

oracle:$ grep -i huge /etc/sysctl.conf# Added 08.07.19 to enable hugepagesvm.nr_hugespages = 1337

Timestamp of last change of /etc/sysctl.conf

oracle:$ ls -l /etc/sysctl.conf-rw-r--r-- 1 root root 2744 Aug  7 14:28 /etc/sysctl.conf