an example to configure huge page on centos (from willis)

hugepage_config.sh

tlbuser=clay
totalgb=$(( 32*1024*1024*1024 ))
pgsize=$(( 2048*1024 ))
sysctl=/etc/sysctl.conf
limits=/etc/security/limits.conf
configured=`grep kernel.shmmax $sysctl`
if [ -n "$configured" ]; then
	echo 'hugepage is configured'
	exit
else
	echo "kernel.shmmax=$totalgb" >> $sysctl
	echo "vm.nr_hugepages=$(( $totalgb/$pgsize ))" >> $sysctl
	echo "vm.hugetlb_shm_group=`grep $tlbuser /etc/group | tr ':' ' ' | awk '{print $3}'`" >> $sysctl
	echo "$tlbuser soft memlock $(( $totalgb/1024 ))" >> $limits
	echo "$tlbuser hard memlock $(( $totalgb/1024 ))" >> $limits
fi