The concepts being described are called "Furious Flushing". I believe Percona did a writeup on this as well some time ago and I had to assist a DBA with getting systems to keep up with Percona MySQL demands regarding furious flushing and adjusting filesystem and memory options. Here [1] is one of them. OS tuning options have changed a bit since 2014 and there are also more recent articles I believe. The biggest win for us was changing the servers to use SSD's and large capacitor backed raid caches.

[1] - https://ftp.fau.de/macports/distfiles/percona/PerconaServer-...