[THIN] Re: XenApp 5 - 2008 x64 Slow
- From: "James Scanlon" <James.Scanlon@xxxxxxxxxxxxxxxx>
- To: <thin@xxxxxxxxxxxxx>
- Date: Fri, 7 Jan 2011 09:04:46 -0000
ah the irony :)
________________________________
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On
Behalf Of Christopher Wilson
Sent: 06 January 2011 21:35
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: XenApp 5 - 2008 x64 Slow
Wow, that's a big deal since AppSense is supposed to add like 30% more
capacity.
I've starting seeing slowness now that my new farm is more heavily
loaded. I'll have to give this a look as well.
On Thu, Jan 6, 2011 at 10:50 AM, Andy Friar <Andy.Friar@xxxxxxxxxxx>
wrote:
Thanks James,
I'll disable PM in the short term and do some further checks
Rgds
Andy
From: thin-bounce@xxxxxxxxxxxxx
[mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of James Scanlon
Sent: 06 January 2011 16:40
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: XenApp 5 - 2008 x64 Slow
We narrowed it down to a combination of Appsense Performance
Manager and Environment Manager
With PM disabled the server is snappy, quick, and as we would
expect (though EM adds around 10-15 seconds to the logon as per the
rules we have defined)
We are in the process of discussing with Appsense and other
support avenues as to where the exact issue lies
As far as we are concerned however the crisis is averted, all
production systems have PM disabled, all servers are getting over 70
users without missing a beat
Individual load tests push the servers to 100 users (so far)
without issue...(re enabling PM and the server is game over at 45-50
users)
James :)
________________________________
From: thin-bounce@xxxxxxxxxxxxx
[mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Landin, Mark
Sent: 06 January 2011 15:42
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: XenApp 5 - 2008 x64 Slow
James Scanlon just had a very similar, if not exactly the same,
problem with his systems and he finally fingered Appsense as the
culprit. I suggest reviewing the list archives for his messages in the
November / December timeframe for details. I'll copy his final response
on 12/13:
"We have troubleshooted this to APPSENSE. When all three
products (AM, EM And PM are enabled) the server doubles users logons
from 14s to around 30, and progressivly gets worse until the server
completely crashes around 45 users.
Stopping any of the three services of appsense relieves the
issue.
Stopping appsense completely sees the server behave as we would
expect sub 15second logons, for over 100 users, instant launching of
programs.
Further investigation continues and will update the list when we
have more info...
Thanks to all for your input.
J
"
You may wish to experiment with disabling Appsense in your
environment to see if it's the culprit in your case.
________________________________
From: thin-bounce@xxxxxxxxxxxxx
[mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Andy Friar
Sent: Thursday, January 06, 2011 9:10 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] XenApp 5 - 2008 x64 Slow
I'm have a problem with the following Windows 2008 SP2
Enterprise x64
XenApp 5 Enterprise R01
Boxes are Dell blade 8 core + HT 49Gb RAM
Local manadatory profiles with full Appsense suite utilising EM
+ Personalisation service.
Desktop / My Documents / Favourites redirected to a Netapp Filer
running CIFS.
The more users that come onto the box the slower the machine
gets.
@ 0-45 users the box is responsive, logon times are good but it
still has this apparent lag when accessing local apps
@ 50 the lag is getting worse sometimes freezes but always comes
back.
@ 60 logon times are substantial, just selecting a cell in excel
can take 30+ seconds.
Performance counters seem fine
14% processor time
25k context switches / sec no massive jumps
0 Processor queue length
99% disk idle
0 disk queue length
15-20k threads
0 Redirector\Current Commands
The only large one is system calls / sec which can be anywhere
from 80k to 1.5m, I've cut down the apps but system calls are still
high.
To me the server feels as if it has no cpu left, but given the
resources free it looks more like an i/o problem, I've tuned the smb
with the following
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Lanmanserver\Param
eters]
"MaxWorkItems"=dword:00002000
"MaxMpxCt"=dword:00000800
(subsequently has been changed to match the Netapp)
"MaxRawWorkItems"=dword:00000200
"MaxFreeConnections"=dword:00000064
"MinFreeConnections"=dword:00000020
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Lanmanworkstation\
Parameters]
"MaxCmds"=dword:00000800
[HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session
Manager\Configuration Manager]
"RegistryLazyFlushInterval"=dword:0000003C
The NetApp filer has had cifs.max_mpx set to 1124 so I've
subsequently changed the citrix servers to match this number rather than
the 2048 previously.
It's running around 30%cpu 2000 io/sec 98% cache hit.
Any suggestions on where else I might look into what is causing
the bottleneck?
Thanks
Andy
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