There is an article on linux-mag which says that increasing the size of the journal on ext4 filesystems actually improves filesystem performance for very large partitions.
I'm wondering if anyone here can authoritatively confirm or deny this for me.
I would just test it myself but I don't have any spare hard drives to reformat at the moment.
People have told me that this is true, and others have told me it isn't.
It does make a measure of sense to me, obviously a 5 TB partition is going to have a lot more metadata than a 500 GB partition, and yet the default journal size would be 128mb for both, so perhaps increasing the journal size for the larger partition might actually have an impact of some kind.
Obviously we are talking about a very small performance gain which would only be measured by the kind of strenuous system activity that a normal user would never experience, such as render farms or database servers, but still finding the answer to this question is important to me.