参考資料 - https://soudai.hatenablog.com/entry/2021/02/02/200104 - https://soudai.hatenablog.com/entry/2021/12/31/114009 - https://about.gitlab.com/blog/2017/02/01/gitlab-dot-com-database-incident/ - https://devblog.thebase.in/entry/bsucon - https://eh-career.com/engineerhub/entry/2018/12/11/110000 - https://speakerdeck.com/soudai/soudai-evolution