[F16] Why PAE kernel with 1 GB RAM?

[Andreas M. Kirchwitz]

	Hello Fedora fans!

Freshly installed Fedora 16 for 32 bit (i686) from DVD on a Pentium 4
with 1 GB RAM. Why does Fedora 16 installs a PAE kernel by default?
Previous versions of Fedora (on that machine) did not install the
PAE kernel but the regular one.

I've seen people on the web asking why they did *not* get a PAE kernel
on their F16/i686 with 4 GB RAM or more. So why did I get PAE?

According to Red Hat, PAE comes with a performance hit from 0 to 10%.
I don't plan to put any additional RAM in that machine, so I'll never
need PAE and instead I prefer to get maximum CPU performance.

Unfortunately, the installation of the regular kernel & kernel-devel
packages with "rpm -Uvh" from the DVD didn't update /boot/grub2/grub.cfg.
Is there are clean way to make the non-PAE kernel the default kernel?
I would have used "yum localinstall" but because the machine has no
Internet connection, yum failed because of some trouble with repomd.xml.
Shouldn't "rpm" run the same pre/post-processing scripts as yum?

	Greetings, Andreas