[THIN] Re: Quick PAE question
- From: "Malcolm Bruton" <malcolm.bruton@xxxxxxxxxxxxxxxxxx>
- To: <thin@xxxxxxxxxxxxx>
- Date: Fri, 12 Jan 2007 14:52:38 -0500
I agree. Not all that bad. If you have servers being constrained by
memory you can turn this on to help. As Joe said be ware that it takes
memory away form the kernel. i.e. if you have apps with large memory
requirements which dictates a handful of users per server it works well.
If you are looking to boost users numbers and the apps used only use
small amount of memory I doubt you have that much to gain except
squeezing on those last few users. Using this setting may dictate that
you need to do some kernel memory tweaking as well especially in windows
2000.
Brian Madden has an excellent article amount kernel tweaking etc I
think it includes PAE etc but I can't find the link.
And one last thing. Make sure you test it !!!!
Malcolm
________________________________
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On
Behalf Of Joe Shonk
Sent: 12 January 2007 18:53
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Quick PAE question
It's not all that bad. It does allow for the unused memory that the
Servers (not just IBM) grab for PCI-X, etc to be remapped. The bad
thing about PAE is it takes away kernel memory space and processing
overhead because the OS now has to create a table, map and track that
memory.
It's a hardware thing, and not really an OS thing. The 3.2 gigs is
what is reported when the system POSTs.
Joe
________________________________
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On
Behalf Of Jay P. Moock
Sent: Friday, January 12, 2007 11:40 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Quick PAE question
Definitely a bad thing unless the app supports it (such as SQL with AWE
enabled).
As far as the 4 vs 3.2/3.5 issue, I've seen it caused by differences
between OS's (Win2k would see less than Win2k3), as well by differences
in Video cards (obviously this shouldn't be the case with Blades). I
would check the BIOS settings on servers that do differ, because I seem
to recall that there are certain settings that will allow a video card
to steal memory from the system, but I could be mistaken.
________________________________
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On
Behalf Of Michael Pardee
Sent: Friday, January 12, 2007 1:24 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Quick PAE question
I don't remember the final answer, but was /PAE a good thing or a bad
thing?
We have a couple hundred IBM HS20 Blades, and on some Blades that OS
sees all 4GB of memory and on other it may see 3.2GB or 3.5GB of memory.
Same BIOS version on most. Adding /PAE we see it all but for some
reason I remember this being a bad thing instead of a good thing to do.
Windows2003 Standard Edition with SP1.
Thanks in advance.
--
Michael Pardee
www.blindsquirrel.org
Other related posts:
