[THIN] Re: XenServer Slowdown

  • From: "Joe Shonk" <joe.shonk@xxxxxxxxx>
  • To: <thin@xxxxxxxxxxxxx>
  • Date: Wed, 17 Nov 2010 09:28:02 -0700

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 disabled)
*       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 ideas'

ANY assistance and advice greatly appreciated!









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