Hi, and thanks for responding, > First off- please try to craft a new email in the future... My apologies to you and the group - I'll do that in future. > > 1) Is my lecturer full of it or does he really have a point? > He's full of it, as far as I can tell anyway, based on what you've > shared with us. Just look at the committers and the commit history to > PostgreSQL, and look at who the largest contributors are and who they > work for. That alone might be enough to surprise your lecturer with. The only non-PostgreSQL company that I could find was Fujitisu - where can I find a (list of) the others? > Databases that do direct I/O don't depend on fsync. That said, I do > think this could have been an issue for Oracle if you ran it without > direct i/o. I think that Oracle are big into asyncio? I know that you have to sudo dnf install some_library with a name like asio/asyncio or something like that? Anyway, why doesn't PostgreSQL use Direct I/O? Thanks again and rgs, Pól... > Stephen