4Gb memory limit
 

Its ms-dos 640k, tweaking your EMM386 & QEMM all over again. Ah remember those days :D


Putting 4Gigs in servers, win2003Server. Whats the recommented settings for this, Esp for VMware for utilizing the full 4Gb?

I know about the /PAE or /3GB switches & that they are more for memory >4Gb but havent quite got my head round it...

Recommendations and results of such switches?

go 64bit OS & hardware :)

try using ESX Server instead, much better custom linux kernel, so no host OS to drag performance down :)

IIRC you can only use PAE on Enterprise edition of Windows 2003

You can edit boot.ini with some of the following options

/3gb Changes the allocation, for 3gb for apps and 1gb for the kernel

/NOPAE disables PAE, funnily enough!!

/PAE to enable PAE! lol.

read http://www.microsoft.com/whdc/system...AE/PAEmem.mspx

As for ESX, that isn't windows and therefore doesnt really apply and has nothing really to do with it.. You need to look at addressing more memory in red hat (not an issue with esx)

Our ESX boxes run with 16gb of ram in the host OS, however in esx the guest OS can only address 3.6gb of Memory so the PAE isnt relevant and can actually slow the guest OS.

If you want a box with a large amount of memory, forget hosting it on ESX, thats not what ESX is designed for.

We have a box running Dual Itanium's Running Windows 2003 Enterprise (IA64) and SQL 2005(IA64) this has 128GB of Ram :) and uses it :)

Its undergoing a test at the moment to see how many transactions it can do in a given time, and they want into the millions :o

If you are wanting to run 32bit Apps still then I would personally use a Operteron Based Machine.

If you want a windows box with a large amount of memory then you need to be using Enterprise or DataCentre edition and I dont need to say that it should be only 2003!! and really the 64 bit version..

David

David

hence my 1st words were go 64bit hardware & OS :)

Well then, PAE is irrelevant as the limit is imposed by the 32 bit address space :)

David

Yep :)

dont use them cr@p DL145 Opterons tho

cheap rubbish built on a friday afternoon in the pub :)

LOL.. I dont even like the 360's

385's or 585's are my server of choice.

The best solution is called Linux !

Or if you really must 64 bit Windows, we went down this route with Oracle databases, it is just a matter of when, not if you go to something with a decent ammount of address space.

Linux :vomit: & its not 64bit hardware or OS - Win2kServer -GSX

I think the concern was the amount of memory available to the guest virtual machines.

/PAE or PAE not added - memory >4Gb
- 2Gb to User - 2Gb to Kernel

/3GB - memory =4Gb
- 3Gb to user - 1Gb to Kernel

/3GB will give you the full 4Gb but at the cost of user speed or am i getting that wrong? Havent really seen anything on the VM webiste, unless someone can direct me

It just means you only allocate 1gb rather than a 2gb block to the kernel. shouldnt really be a problem.

But you still have the memory limit imposed via Vmware..

and if this is GSX and not ESX.. good luck to you!!

PS im windows through and through... however I quite like RH Enterprise and ESX :)

Also using Fedora Core 5 :)

David

what is the limit? docs on this?

http://www.vmware.com/community/thre...405540&#405540

and here..

http://www.vmware.com/pdf/gsx_specs.pdf

David