Hadoop HDP THP Disable
·
Disable
Transparent Huge Pages
§ RHEL
·
Disable THP at boot time
·
Append the following to
the kernel command line in /etc/grub.conf:
·
transparent_hugepage=never
·
Add the following
commands to your /etc/rc.local file
if test -f
/sys/kernel/mm/transparent_hugepage/enabled; then
echo never >
/sys/kernel/mm/redhat_transparent_hugepage/enabled
fi
if test -f
/sys/kernel/mm/transparent_hugepage/defrag; then
echo never > /sys/kernel/mm/redhat_transparent_hugepage/defrag
fi
·
Disable THP at run time
·
Run the following
commands to disable THP on-the-fly:
·
echo never >
/sys/kernel/mm/redhat_transparent_hugepage/enabled
·
echo never >
/sys/kernel/mm/redhat_transparent_hugepage/defrag
·
How to check if
HugePages is enabled or disabled
·
if the value of
HugePages_Total is "0" it means HugePages is disabled on the system.
·
grep -i HugePages_Total
/proc/meminfo
·
if the value in
/proc/sys/vm/nr_hugepages file or vm.nr_hugepages sysctl parameter is
"0" it means HugePages is disabled on the system
·
cat
/proc/sys/vm/nr_hugepages
·
sysctl vm.nr_hugepages
§ Reference Documents
