Ron Johnson wrote:
"Large systems" (meaning mainframes and "traditional" minicomputers
running legacy OSs) are never dedicated. They run application
software as well as RDBMSs.
OK, we're talking about two different things.
Translating that into "modern times", a Linux box *should* be able to
competently run MySQL and Apache at the same time.
And it can. If it couldn't, Plesk would not be selling. In my job I
admin servers that do web, mail, and db for anything from a handful to
1200+ domains on a single box. No problem there (mostly). But the load
on the server's resources are, in the end, down to to what your
application does.
There are several good reasons why you might want to put your DB on a
separate server.