How to unload a disk from journaling?

Question

linux

A web server with a good config slows down and obviously on disk operations. iotop indicates logging. You can’t turn it off completely, of course, but can you do something?
Installed 4 disks: 2HDD for the system and later added 2 SSDs for site files and MySQL.

Answer 1

Transfer the necessary logs to a separate disk.

Answer 2

There was such a recommendation to reduce the frequency of logging. Add parameters to fstab/on mount noatime,commit=60,barrier=0
Or use another journaled fs.

Answer 3

add an ssd disk as a cache, using, for example, bcache
if you use bcache in read caching mode, then you can even take a cheap, unreliable one, in which case the data will not be corrupted in this case.