Users should ensure that the number of system wide shared memory segments (shmmni) exceeds the number of huge pages required.
- To identify current shmmni setting:
# cat /proc/sys/kernel/shmmni - To set (no reboot required - but not permanent):
# echo 8000 > /proc/sys/kernel/shmmni - To set (permanent - reboot required):
# echo "kernel.shmmni=8000" >> /etc/sysctl.conf
For example, if 4000 huge pages are required, increase the current shmmni value by 4000.