# Filesystem I/O is usually much more efficient than swapping, so try to keep
# swapping low. It's usually safe to go even lower than this on systems with
# server-grade storage.
vm.swappiness = 30
重启操作系统来验证结果
[root@oracle12c ~]# uname -r
3.10.0-123.el7.x86_64
[root@oracle12c ~]# cat /sys/kernel/mm/transparent_hugepage/enabled
always madvise [never]