All physical memory not recognized by OS

I have Win2003 server installed on a Proliant DL 380 4th generation
box with 4 GB RAM. Win only shows that it has 2 GB available. I know
of the 512 MB of RAM set aside on DL 380 systems with the Intel 5720
chipset for use with PCI-related functions, but why does Win2003 see
half of my total physical RAM?

<> wrote:
> I have Win2003 server installed on a Proliant DL 380 4th generation
> box with 4 GB RAM. Win only shows that it has 2 GB available. I
> know of the 512 MB of RAM set aside on DL 380 systems with the Intel
> 5720 chipset for use with PCI-related functions, but why does
> Win2003 see half of my total physical RAM?

The DL380G5 at least has various memory RAID options which can
cut-backon the quantity of RAM seen by the OS. You might peruse the
BIOS settings on your G4 to see if it has something similar and to
what it might be set.

I'd be more specific, but I've only ever touched a DL380G5 a few times
- most of what I access are the Integrity boxes - but I do recall that
from one of the times I did access a DL380G5 so thought I'd toss-out
the suggestion.

Being more a Linux guy i've no idead if there any Win2003 server
options which might control how much memory it sees/uses.

rick jones
--
a wide gulf separates "what if" from "if only"
these opinions are mine, all mine; HP might not want them anyway...
feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH...

On 31 Jan 2007 17:15:45 -0800, wrote:

> I have Win2003 server installed on a Proliant DL 380 4th generation
> box with 4 GB RAM. Win only shows that it has 2 GB available. I know
> of the 512 MB of RAM set aside on DL 380 systems with the Intel 5720
> chipset for use with PCI-related functions, but why does Win2003 see
> half of my total physical RAM?

I don't personally have experience with Win2003 server or any
systems having more than 2GB of memory, but here are trimmed copies
of three messages posted about almost exactly a year ago in
rec.photo.digital :

[Msg #1 ==============================================]
>> If you are fortunate enough to have 4GB of physical memory for your
>> image editing with Windows XP, are you actually seeing 4GB?
>
> http://www.microsoft.com/whdc/system...AE/PAEmem.mspx
>
> Windows XP Professional and Windows Server 2003 Memory Support. The maximum
> amount of memory that can be supported on Windows XP Professional and
> Windows Server 2003 is also 4 GB. However, Windows Server 2003, Enterprise
> Edition supports 32 GB of physical RAM and Windows Server 2003, Datacenter
> Edition supports 64 GB of physical RAM using the PAE feature.
>
> The virtual address space of processes and applications is still limited to
> 2 GB unless the /3GB switch is used in the Boot.ini file. When the physical
> RAM in the system exceeds 16 GB and the /3GB switch is used, the operating
> system will ignore the additional RAM until the /3GB switch is removed. This
> is because of the increased size of the kernel required to support more Page
> Table Entries. The assumption is made that the administrator would rather
> not lose the /3GB functionality silently and automatically; therefore, this
> requires the administrator to explicitly change this setting.
[================================================== ===]

[Msg #2 ==============================================]
> To expand on this, even with the 3 GB switch set, each 32 bit application
> gets 2 GB of space max. So one app would have 2 GB and the other could have
> the remaining 1GB.
>
> If you put 4GB in a non server machine, it is important to use the switch or
> you are wasting memory as the OS never uses anywhere near 2GB in a
> workstation.
>
> Also, with 4GB, the chipset may use some address space and you will only get
> something like 3.4GB.
[================================================== ===]

[Msg #3 ==============================================]
>>Eh? Windows uses the physical memory it needs, then some more, and once
>>it's run out it uses the disk as well.
>
> The max size of any single process (or data structure) is 2GB in a 32
> bit system, and the pagefile gets used when total of all process
> Working Sets[1] exceeds the physical memory, limited to 3GB on a 32
> bit windows system. This is the 5 cent explanation.
>
> here's is a new Adobe tech note for CS2 that covers all current 32 and
> 64 bit operating systems and 32 and 64 bit iron, as wall as workdisk
> requirements.
>
> http://www.adobe.com/support/techdocs/320005.html
>
> [1] http://en.wikipedia.org/wiki/Working_set
[================================================== ===]

On Feb 1, 1:22 am, ASAAR <cau...@22.com> wrote:
> On 31 Jan 2007 17:15:45 -0800, pjaglow...@gmail.com wrote:
>
> > I have Win2003 server installed on a Proliant DL 380 4th generation
> > box with 4 GB RAM. Win only shows that it has 2 GB available. I know
> > of the 512 MB of RAM set aside on DL 380 systems with the Intel 5720
> > chipset for use with PCI-related functions, but why does Win2003 see
> > half of my total physical RAM?
>
> I don't personally have experience with Win2003 server or any
> systems having more than 2GB of memory, but here are trimmed copies
> of three messages posted about almost exactly a year ago in
> rec.photo.digital :
>
> [Msg #1 ==============================================]
>
> >> If you are fortunate enough to have 4GB of physical memory for your
> >> image editing with Windows XP, are you actually seeing 4GB?
>
> >http://www.microsoft.com/whdc/system...AE/PAEmem.mspx
>
> > Windows XP Professional and Windows Server 2003 Memory Support. The maximum
> > amount of memory that can be supported on Windows XP Professional and
> > Windows Server 2003 is also 4 GB. However, Windows Server 2003, Enterprise
> > Edition supports 32 GB of physical RAM and Windows Server 2003, Datacenter
> > Edition supports 64 GB of physical RAM using the PAE feature.
>
> > The virtual address space of processes and applications is still limited to
> > 2 GB unless the /3GB switch is used in the Boot.ini file. When the physical
> > RAM in the system exceeds 16 GB and the /3GB switch is used, the operating
> > system will ignore the additional RAM until the /3GB switch is removed. This
> > is because of the increased size of the kernel required to support more Page
> > Table Entries. The assumption is made that the administrator would rather
> > not lose the /3GB functionality silently and automatically; therefore, this
> > requires the administrator to explicitly change this setting.
>
> [================================================== ===]
>
> [Msg #2 ==============================================]> To expand on this, even with the 3 GB switch set, each 32 bit application
> > gets 2 GB of space max. So one app would have 2 GB and the other could have
> > the remaining 1GB.
>
> > If you put 4GB in a non server machine, it is important to use the switch or
> > you are wasting memory as the OS never uses anywhere near 2GB in a
> > workstation.
>
> > Also, with 4GB, the chipset may use some address space and you will only get
> > something like 3.4GB.
>
> [================================================== ===]
>
> [Msg #3 ==============================================]>>Eh? Windows uses the physical memory it needs, then some more, and once
> >>it's run out it uses the disk as well.
>
> > The max size of any single process (or data structure) is 2GB in a 32
> > bit system, and the pagefile gets used when total of all process
> > Working Sets[1] exceeds the physical memory, limited to 3GB on a 32
> > bit windows system. This is the 5 cent explanation.
>
> > here's is a new Adobe tech note for CS2 that covers all current 32 and
> > 64 bit operating systems and 32 and 64 bit iron, as wall as workdisk
> > requirements.
>
> >http://www.adobe.com/support/techdocs/320005.html
>
> > [1]http://en.wikipedia.org/wiki/Working_set
>
> [================================================== ===]

Thanks to all for the help. It was a simple solution I had the ROM
configured to use 2 of my 4 DIMMs as hot backup spare memory. I had
to turn that off in the ROM configuration.