New in Kubernetes v1.22: alpha support for using swap memory
Author: Elana Hashman (Red Hat) The 1.22 release introduced alpha support for configuring swap memory usage for Kubernetes workloads on a per-node basis. In prior releases, Kubernetes did not support the use of swap memory on Linux, as it is difficult to provide guarantees and account for pod memory utilization when swap is involved.
https://kubernetes.io/blog/2021/08/09/run-nodes-with-swap-alpha/
