Nothing ext4 specific IIRC. There are some kernel optimization you can do, like this, but consider some of that to be a placebo: https://unix.stackexchange.com

Nothing ext4 specific IIRC. There are some kernel optimization you can do, like this, but consider some of that to be a placebo: https://unix.stackexchange.com/questions/30286/can-i-configure-my-linux-system-for-more-aggressive-file-system-caching https://unix.stackexchange.com/questions/30286/can-i-configu... Other than that, maybe consider an alternative filesystem like f2fs or xfs depending on the medium.