physical memory

[baran.yurdagul at turkcell.com.tr]

How can I set the kernel to Support hugemem ? Do I need to recompile
kernel ?

-----Original Message-----
From: redhat-list-bounces at redhat.com
[mailto:redhat-list-bounces at redhat.com] On Behalf Of nilesh vaghela
Sent: Thursday, December 01, 2005 7:39 AM
To: General Red Hat Linux discussion list
Subject: Re: physical memory

If you can upgrade to AS 4.0 would be the best.
Other wise you can use hugemem kernel.
as suggested by Tobias Speckbacher

Nilesh

On 12/1/05, Tobias Speckbacher <TSpeckbacher at quova.com> wrote:
>
> > -----Original Message-----
> > From: redhat-list-bounces at redhat.com [mailto:redhat-list-
> > bounces at redhat.com] On Behalf Of Mindy Preston
> > Sent: Wednesday, November 30, 2005 10:02 AM
> > To: General Red Hat Linux discussion list
> > Subject: Re: physical memory
> >
> > Brian,
> >
> > Are you running a 64-bit version of Red Hat?  If you're running a
> 32-bit
> > one you will be limited to 4GB of memory, since more can't be
> addressed
> > by 2^32.
>
> The hugemem kernel supports up to 64GB of memory for 32 bit AS3
systems.
> There is some performance impact to using memory sizes over 4GB on
32bit
> systems, from what I read 2-3%.
>
> The limiting factor is the maximum memory allocation per user process,
> which can not be larger than 4GB, the same goes for kernel address
> space.
>
> For reference please check:
>
> http://www.in.redhat.com/software/rhel/3features/
>
> >
> > -Mindy
> >
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