Re: Terminal Server 32bit /PAE vs 64bit

1) A 32-bit system cannot use more than 4gb of memory without PAE. PAE is ok but it will cut down on your kernel memory because it requires more PTE's to handle the extra addressing. Never EVER use the /3gb switch on a terminal server. Before any of this though, I would go ahead and do some real performance monitoring with something other than task manager. Your problem may not be memory but the fact that you have a 13gb page file. You really shouldn't have anymore than 4gb tops.

Jeff Pitsch
Microsoft MVP - Terminal Server
Citrix Technology Professional
Provision Networks VIP

Forums not enough?
Get support from the experts at your business
http://jeffpitschconsulting.com

Jerry Alan Braga wrote:
We currently are running 2 win2003 EE sp2 terminal servers in an active directory domain that get their romaing profiles for the TS users from the DC. We are now running into performance issues (cpu/memory) as it seems from the task manager performance monitor that we cannot use more than 3.9gb of memory even though we have 9gb installed and have a 13gb page file (suggested by windows) and have the /pae switch enabled in the boot.ini without the /3gb switch.

My question is that does not the /pae along with win2003 EE give the ability of using up 16gb like it says for our applications. Our applications are 32bit based an I know about the 32bit limit of memory addressing but is that not what the /pae and win2003 EE supposed to address. Or does 64bit win2003 EE actually give you that through the WOW emulator to 32bit applications.


.

Relevant Pages

  • Re: Cannot activate sbcl
    ... Somehow I've managed to use 16GB and I'm using the 32bit version of Windows XP, and I was able to use all that memory (e.g. ... supports PAE. ... at any one time, but can access RAM above 4GB through AWE, a paging ...
    (comp.lang.lisp)
  • Re: A8N-SLI SE and PAE
    ... He wants to max out the board with 4Gb of RAM so I wanted to make sure it was possible to set PAE on so it dosn't let most of the last 1Gb go to waste. ... I don't know which BIOS it's currently using but we can update it if needed. ... If there's no PAE or memory hole options we can try PAE in the boot.ini but I don't know if thats going to work. ... The following table specifies the limits on physical memory for Windows XP. ...
    (alt.comp.periphs.mainboard.asus)
  • Re: Physical Address Extension (PAE) does not work on vista as expected.
    ... If you don't have more than 4GB of memory, ... That's the whole point of PAE. ... A feature that allows x86-based computers to support more than 4 ... Up to 64 GB of physical memory can be ...
    (microsoft.public.windows.vista.performance_maintenance)
  • Re: [SLE] 32-bit machines hit physical RAM limit at 4GB?
    ... But these applications run fine on my servers with a lot ... more memory, ... Your applications continue to work because they are still using at most 4GB ... memory space, which is the linux maximum, even on a kernel with PAE ...
    (SuSE)
  • Re: A8N-SLI SE and PAE
    ... He wants to max out the board with 4Gb of RAM so I wanted to make sure it was possible to set PAE on so it dosn't let most of the last 1Gb go to waste. ... I don't know which BIOS it's currently using but we can update it if needed. ... If there's no PAE or memory hole options we can try PAE in the boot.ini but I don't know if thats going to work. ... The following table specifies the limits on physical memory for Windows XP. ...
    (alt.comp.periphs.mainboard.asus)
Loading