Oracle Linux Inconsistent swappiness value with cgroup "memory.swappiness"

APPLIES TO:

Linux OS – Version Oracle Linux 8

Linux x86_64

SYMPTOMS:

OL8 instance swap upto 2GB even though the kernel parameter "vm.swappiness " is set to 1.

NOTE – vm.swappiness value in this example was set to 1 but it can be set to 0,10,60(default) or 100

* 0: swap is disable

* 1: minimum amount of swapping without disabling it entirely

* 10: recommended value to improve performance when sufficient memory exists in a system

* 60: Default swappiness value

* 100: aggressive swapping

$sudo sysctl -a | grep swappiness
vm.swappiness = 1

$sudo cd /sys/fs/cgroup/memory/ && grep . **/memory.swappiness
init.scope/memory.swappiness:60
machine.slice/memory.swappiness:60
oca.slice/memory.swappiness:60
system.slice/memory.swappiness:60
user.slice/memory.swappiness:60