“Transparent Hugepages” is a Linux kernel feature intended to improve performance by making more efficient use of your processor’s memory-mapping hardware. It is enabled (“
enabled=always”) by default in most Linux distributions.
Transparent Hugepages gives some applications a small performance improvement (~ 10% at best, 0-3% more typically), but can cause significant performance problems, or even apparent memory leaks at worst.
To avoid these problems, you should set
enabled=madvise on your servers by running
echo madvise | sudo tee /sys/kernel/mm/transparent_hugepage/enabled
transparent_hugepage=madvise on your kernel command line (e.g. in
This change will allow applications that are optimized for transparent huge pages to obtain the performance benefits, and prevent the associated problems otherwise.