"PorBar" <compsosinc@newsgroup> wrote in message
>A vendor sold us a Windows 2003 Server Std Edition 32-Bit, with (2)
> Xeon Processors and 8GB of memory -to be used as SQL Server only--is a
> member Server in domain..
> We ask him why he sold us 8GB since a 32-bit OS could only utilize
> 4GB. He said it was because there were dual processors and they could
> each utilize 4GB each...that just does notsound right to us???
> The other server he sold us at the same time has same OS, but (1) Quad-
> Core and 4GB --and it is the DC in the domain with the SQL above.
> If he is correct, could the (1) Quad-core CPU utilize 8GB???
> Thanks for any input
Yes it can, by using the /pae switch in the boot.ini. The switch will tell a
32 bit /pae aware OS that there is 4GB or more of RAM, and how to address it
beyond the physical 4GB addressable limit (based on registers in the Intel
CPU). However, many apps don't recognize the extension, but SQL and Exchange
I don't know if Google Groups, where you're posting from, will allow you to
search or look back at a newsgroup thread link, but I will copy/paste below
the reference and what transpired to get a better understanding of the /pae
in that discussion.
Keep in mind, Google Groups, where you're posting from, as well as
TechArena and dozens of other web-based groups ALL pull and push their
postings into the Microsoft newsgroups. It's rather much easier to use a
newsreader than using their web-based portals. It's easier to search, mark
threads, and a number of other things.
Subject: Page file
Date: Thu, 27 Aug 2009 10:16:02 -0700
"Dan DeCoursey" <DanDeCoursey@newsgroup> wrote in message
> Hello Bruce,
> Well it seems as if I keep re iterating the same detials over and over;
> My server has 4gb ram installed.... you folks keep saying that 1.5 times
> the "default" ....then why was mine set originally at minimum=2048
> max=4098 ?
> I , since, have examined a couple other servers here and they are the
> ( these servers are all the same box (hp ml350g5) configured using my
> "standard config" which is Server 2003 standard w/4gb ram) This appears to
> to be the "default" 2048/4096
> The recommedation to establish a pagefile that is 1.5 times the physical
> = 6144 .. this is what I was origianlly after but when I attempted to
> that change in the pagefile size.. it would say "please select a
> maximun files size that is equal to, or less than 4096"
> please expalin this ?
> So I then put the /PEA option in the boot.ini...then the server
> me to change the pagefileto 6144 ( min and max) and it was
> what have I Done ? something good or bad or indifferent?
> installing more ram will that do anything more for me since I am running
> bit server 2003 standard edition ?
> I appreciate everyones patience in me getting a grip on this
The /pae (you mentioned /pea) switch allows the system to see beyond the
physical 32bit addressable spectrum. If you take 2^32, it equals to 4GB (4
294 967 296 bytes), hence the 4GB limitation and why the system would not
let you set a pagefile beyond what it can read physically. Once you set the
/pae, it now can 'address' beyond it's 4GB limit.
The reason the pagefile is not setting beyond 4GB is because it simply can't
address beyond the 4GB, because you are implying to the system that there is
more than 4GB of ram when you set it higher than 4GB, therefore it's simply
saying, in layman's terms, "I don't understand." Once the /pae is in place,
now it can address it.
FYI, a 64 bit system is 2^64 which equals to 18,446,744,073,709,551,616
bytes, (whatever denomination they call it), which is pretty large. I don't
think there's any hardware yet in production that can handle that number. If
there is, they haven't told us yet or I haven't heard of it.
Is it bad, good or indifferent? It depends on what you have running, and if
that app can truly 'read' that extra RAM the /pae is providing. SQL and
Exchange will, other apps may not.
Just to recall back to the Pentium III days, they offered a PSE (Page Size
Extension) to allow addressing up to 64 GB by adding 4 more bits to the
memory register (2^36). Not that I used it, knew anyone that used it, nor
what apps recognized it, but it existed.
More info on PAE and what it means. Keep in mind it is not a Microsoft
thing, rather it is an Intel thing (many folks don't know that) in how the
CPU addressable register area is constructed (the register in the CPU that
indicates the beginning byte and end byte of a memory area).
Physical Address Extension - Wikipedia, the free encyclopediaIn computing,
Physical Address Extension (PAE) is a feature of some x86 and x86-64
processors that enables the use of more than 4 gigabytes of physical ... http://en.wikipedia.org/wiki/Physical_Address_Extension
Physical Address Extension - PAE Memory and WindowsFeb 9, 2005 ... Describes
the design issues for systems capable of supporting greater than 4 GB of
memory and for the adapters and drivers used in such ... http://www.microsoft.com/whdc/system...AE/PAEdrv.mspx
Operating Systems and PAE SupportJul 14, 2006 ... Describes some techniques
that Windows 2000 and several UNIX operating systems use to provide support
to applications using Physical Address Extension ... http://www.microsoft.com/whdc/system...AE/pae_os.mspx
I hope that helps!
This posting is provided "AS-IS" with no warranties or guarantees and
confers no rights.
Please reply back to the newsgroup or forum for collaboration benefit among
responding engineers, and to help others benefit from your resolution.
Ace Fekay, MCT, MCTS Exchange, MCSE, MCSA 2003 & 2000, MCSA Messaging
Microsoft Certified Trainer
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