https://blog.wongcw.com/2022/07/02/ubuntu-22-04-lts%e7%b5%82%e6%96%bc%e8%a6%81%e6%94%b9%e6%8e%89%e9%81%8e%e6%96%bc%e6%bf%80%e9%80%b2%e7%9a%84systemd-oomd%e7%ad%96%e7%95%a5%e4%ba%86/