Mysql (well, MariaDB) is Just another system process on here. If I got enough concurrent connections and enough slow queries it could peak but realistically I’d imagine something else would fail long before the database started to complain, ha.only a very shitty query would cause that. So could be a sign of a DDOS. Maybe boards dot ie are trying to sabotage.
if its running in a jvm and that jvm only has a max of 5GB heap assigned to it, it will tank rather than use the free memory on the system.