[Gllug] 4G Memory Restriction

[Alain Williams]

On Mon, Apr 10, 2006 at 12:30:43PM +0100, Richard Jones wrote:
> On Mon, Apr 10, 2006 at 11:38:20AM +0100, Steve Nelson wrote:
> > Right - so supposing I am running on 64 bit architecture (for example
> > I've just built some rhel 3 and 4 machines on DL585s which use
> > Opterons).  I've got 32 bit kernel and userland on this machine.
> 
> You could recompile the kernel for 64 bit support and run your 32 bit
> userland on top.  This doesn't buy you a lot though.  You should
> really install a 64 bit distro (64 bit kernel, 64 bit userland - I'd
> recommend Ubuntu for desktop or Debian/AMD64 for servers, but there
> are plenty of other choices now).  Then if you still have any legacy
> binary-only 32 bit apps, you can still run them, so long as you also
> install any legacy libraries they depend on.  Most 64 bit distros make
> this reasonably easy.

Note that a 64 bit box should run your 32 bit apps without change.
Only a few of your apps are (I suspect) going to need > 3GB memory,
these are the ones to recompile. If the others are difficult, don't
bother.

-- 
Alain Williams
Parliament Hill Computers Ltd.
Linux Consultant - Mail systems, Web sites, Networking, Programmer, IT Lecturer.
+44 (0) 787 668 0256  http://www.phcomp.co.uk/

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