/PAE, Windows Server 2003 SP2 32bit Ent Ed, Apps Virtual Address S

Morning All,

I have read numerous posts and technet articles regarding the use of the
/PAE switch on 32bit Windows systems and I am still confused (probably just
me!)on what this means for a memory hungry applications. I am clear that when
using 4GB of memory in a 32bit system the memory manager maps this to the
32bit Virtual Address space.....all is fine. If we wanted to expand this we
could use the /3GB switch to take some of the Kernel memory and give it for
application use.

When using the /PAE switch by itself we expand the physical memory address
range to 64GB but we are still using a 32bit Virtual Address Space with
application that have 32 pointers. Here is where it gets a bit cloudy!

My Questions are:

1. When not using the /PAE switch and 4GB of physical RAM the max virtual
memory a process or application can address is 2GB (with the other 2GB going
to the Kernel) - Y/N

2. Using the /PAE switch and say 16GB of physical RAM what is the maximum
memory available to a 32bit application? is this now 4GB or still 2GB but
more programs can be run concurrently to use the memory in the server?

Thanks for your help

Regards

Tony

Can anyone help me please?

"Flipper1974X" wrote:

> Morning All,
>
> I have read numerous posts and technet articles regarding the use of the
> /PAE switch on 32bit Windows systems and I am still confused (probably just
> me!)on what this means for a memory hungry applications. I am clear that when
> using 4GB of memory in a 32bit system the memory manager maps this to the
> 32bit Virtual Address space.....all is fine. If we wanted to expand this we
> could use the /3GB switch to take some of the Kernel memory and give it for
> application use.
>
> When using the /PAE switch by itself we expand the physical memory address
> range to 64GB but we are still using a 32bit Virtual Address Space with
> application that have 32 pointers. Here is where it gets a bit cloudy!
>
> My Questions are:
>
> 1. When not using the /PAE switch and 4GB of physical RAM the max virtual
> memory a process or application can address is 2GB (with the other 2GB going
> to the Kernel) - Y/N
>
> 2. Using the /PAE switch and say 16GB of physical RAM what is the maximum
> memory available to a 32bit application? is this now 4GB or still 2GB but
> more programs can be run concurrently to use the memory in the server?
>
> Thanks for your help
>
> Regards
>
> Tony
>
>
>