[THIN] Re: XenServer Slowdown

  • From: "James Scanlon" <James.Scanlon@xxxxxxxxxxxxxxxx>
  • To: <thin@xxxxxxxxxxxxx>
  • Date: Thu, 18 Nov 2010 08:13:38 -0000

thats horrendous. I cant believe its that difficult to 'troubleshoot'
profile errors on 2008. This is the first time ive had to do anything
citrix related on W2008 - oh the agony! :)
cheers for the input dan!


From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On
Behalf Of Dan Dill
Sent: 17 November 2010 18:05
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: XenServer Slowdown

In 2003 you could turn on logging and then get some good insight into
exactly what's going on, apparently with 2008+ you have to bring in
Microsoft to debug profile loading:






Dan Dill |Systems Engineer | Harsch Investment Properties 
1121 SW Salmon St. | Portland, OR 97205 |(: 503.973.0206 | *: 


From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On
Behalf Of James Scanlon
Sent: Wednesday, November 17, 2010 8:57 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: XenServer Slowdown


servers have 36GB of RAM physically.

Task manager shows 32GB of ram

HP SIM reports 31.9GB of ram available/addressable.....



From: James Scanlon 
Sent: 17 November 2010 16:46
To: 'thin@xxxxxxxxxxxxx'
Subject: RE: [THIN] Re: XenServer Slowdown

XenApp - Correct

Windows 2008 SP2 - not R2,

Windows system reports 36GB in system properties, HP SIM reports 32GB of
ram addressable / available - WTF? - chasing this up for further




From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On
Behalf Of Joe Shonk
Sent: 17 November 2010 16:28
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: XenServer Slowdown

I'm going to out on a limb and assume that you are referring to XenApp
and not XenServer.


First question, why Windows 2008 Standard x64?

                Windows 2008 R2 is going to be a much better choice,
especially if you are running this directly on new hardware.

                Second, Standard edition only support 32 gigs and you're
showing 36 gigs


Also, which metric is sitting at 25% utilized?




From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On
Behalf Of James Scanlon
Sent: Wednesday, November 17, 2010 8:45 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: XenServer Slowdown



(sorry about last unfinished email went to save to get more info and
clicked send - sigh)


We are having speed issues with our XenServers 

*       Brand New builds 
*       Deployed with Altiris 
*       Xenserver 5.0 
*       Windows 2008 Standard 64bit 
*       36GB RAM 
*       Dual CPU, 8 Core processors X5560 2.80Ghz 
*       Appsense EM and PM (with citrix CPU and memory management
*       Sophos AV 
*       HP Hardware DL380 G6 with teamed nics

For normal operation we are getting 25 second login time (to desktop)


After approx 30 users (or 2 days without a reboot), the performance
drops to 1-1.5 minutes just to log in, everything sluggish, cant open
task manager even though multiple taskman icons appear in systray.

No performance issues on the systems themselves, all sitting around %25
utilised. (CPU, MEM, DISK etc)


So far:

We have disabled Sophos, no result

disabled Appsense, no result

turned on VT instructions for CPU in the BIOS, no result

turn off TCP offloading for the NICS

HW firmware for Servers / patching (latest PSP)
Software for OS and apps / patching 



Any one seen anything like this already? apart now from bringing up a VM
host to eliminate hardware or a full manual rebuild and testing at each
stage of the build process - we are starting to run out of 'obvious

ANY assistance and advice greatly appreciated!









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