Huge Pages - Notes

Set hugepages permanently

Set the vm.nr_hugepages and vm.nr_hugepages_mempolicy values in /etc/sysctl.conf

• These values are the "page count" as in how many pages you want.
• Each page is 2mb in size so 15000 pages would be 30GB of memory.

sudo sysctl -a | grep -i huge
vm.hugepages_treat_as_movable = 0
vm.hugetlb_shm_group = 0
vm.nr_hugepages = 15000
vm.nr_hugepages_mempolicy = 15000
vm.nr_overcommit_hugepages = 0

Set hugepages temporarily

echo 15000 > /proc/sys/vm/nr_hugepages

Check current hugepage allocation

cat /proc/sys/vm/nr_hugepages
OR
sysctl -a | grep -i huge

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