Except that Pair runs and administrates the MySQL server for us, so we are not free to run our own MySQL server.

"Your replay show a lack of experience or at least "understand" the difference between upgrading OS V.S a software running under it like MySQL.

Plus the lack of research"

I think you mean "reply shows" rather than "replay show", regardless your lack of research into the setup of this site or who has experience administering it is clear.