http://blog.chinaunix.net/uid-30401178-id-5159439.html
分配内存设为模式1, sysctl vm.overcommit_memory=1
echo never > /sys/kernel/mm/transparent_hugepage/enabled
http://blog.chinaunix.net/uid-30401178-id-5159439.html
echo never > /sys/kernel/mm/transparent_hugepage/enabled