[THIN] Re: Hardware for Citrix Servers
- From: "Minero, Hector B CIV NSWCDD, K55" <hector.minero@xxxxxxxx>
- To: <thin@xxxxxxxxxxxxx>
- Date: Thu, 21 Feb 2008 07:37:02 -0500
Thanks for the info. It looks pretty good.
The servers are dual. My mistake.
_________________________
Hector Minero
NSWCDD Code K55
Ph: 540.653.8859
Email: hector.minero@xxxxxxxx
-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx
[mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of TSguy92 Lan
Sent: Wednesday, February 20, 2008 1:49 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Hardware for Citrix Servers
"I have one 4GB page file, which is the limit on Windows 2003
Standard.
Is the page file being used before the 4 GB of RAM?
Should I add another 4GB page file? Will it help?"
One question, your first post mentioned that your current 2850's
were Quads, but this last post you mentioned Duals, which are they?
Windows 2003 standard's "limit" so to speak, is only being able
to support 4gb of physical RAM. (32bit windows ensures that only 2gb of
those 4gb are available by default for user processes)
The windows GUI actually prevents setting a page file larger
than 4096 under all of the MS 32bit OS versions (except for win2k3 -
sp1), but the page file can actually be set to any size regardless of
the OS version using a registry modification:
http://support.microsoft.com/kb/237740 - How to overcome the
4095 mb paging file size limit in windows.
As others have already suggested though, increasing your
pagefile likely won't do you any good in this case. You generally want
to use the above trick to increase your page file size on servers
running "windows enterprise" with over 4gb of ram (think of beefy sql
servers etc..).
A TS server's page file getting up to 3.x gb is not surprising
at all really, even with only 25 active user sessions. On one of our
servers here I've got 33 users active on a server, which currently shows
a 3.5gb pagefile. In testing that that system scaled up to just about 46
user connections before session performance started to be affected. For
my case, we're hitting those numbers because this server is supporting
some apps with memory footprints @ 80mb+ (core app starts around 40mb
and scales up), this is a Win2k3 sp2 server, MF 4.0 (3gb Ram, 4gb
pagefile) running on VMware ESX 3.5.
Some suggestions to consider that may help with your performance
at a server by server level:
- Tscale / Appsense / etc.. - software level boosting of memory
session management, can increase the number of active user sessions per
server. (several vendor solutions claim to do this, I'm not a sales guy,
but tscale and appsense have been around long enough to be solid
solutions in this area)
- Solid state disks for pagefiles - putting your pagefile on
solid state disks with their fast response times can greatly improve
system performance, it's certainly not without cost, however. SS disks
can be spendy, but supposedly they are coming down in price these days.
All the same, it's all well and good to hope to reach a set
number of user connections per server. But many many many variables can
affect the outcome of what your servers will eventually be able handle
under load. Sufficient testing with your new hardware should at least
get you a baseline of the average user's memory footprint, which can
help you determine your user load per server, at which point you start
defining your N+1. I always try and find a "power user" / "abuser user"
to have them put a new system through it's paces during testing if
possible.
HTH
Lan
On Wed, Feb 20, 2008 at 8:01 AM, Minero, Hector B CIV NSWCDD,
K55 <hector.minero@xxxxxxxx> wrote:
Thanks for the replies.
On my current servers, Dell PowerEdge 2850 Duals, 4 GB
RAM, at 25 users
I can see the page file usage at 3.14 GB.
I have one 4GB page file, which is the limit on Windows
2003 Standard.
Is the page file being used before the 4 GB of RAM?
Should I add another 4GB page file? Will it help?
_________________________
Hector Minero
NSWCDD Code K55
Ph: 540.653.8859
Email: hector.minero@xxxxxxxx
-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx
[mailto:thin-bounce@xxxxxxxxxxxxx] On
Behalf Of Jez
Sent: Saturday, February 16, 2008 3:28 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Hardware for Citrix Servers
Don't speculate - test it and see what works for your
users. You may get
75/box, you may only get 30 - it depends on how they use
the apps and on
what their expectations are as much as anything else.
On Feb 15, 2008 9:44 PM, Chad Schneider (IT)
<Chad.M.Schneider@xxxxxxxxxxxxx> wrote:
>
>
> I would hope to get 50 users, but with this set of
apps., depending on
> usage, I would not COUNT on 50.
>
>
> IE, MS Office 2003, Adobe Acrobat Professional, MS
Project.
>
> IE is @ 50MB/user, Word is @ 50MB/user, Acrobat READER
is @ 25MB.
> That is per user, not including TS/Citrix/OS overhead
per user, simply
> opening the application, not working in it.
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