https://jira.mariadb.org/browse/MDEV-39185
[MDEV-39185] Docs for innodb_flush_method are incorrect - Jira
innodb flush methodmdevdocs
https://releem.com/docs/mysql-performance-tuning/innodb_flush_method
innodb_flush_method - Best Practices of tuning MySQL
Best Practices of Using MySQL innodb_flush_method Settings
innodb flush methodbesttuning