[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\Parameters]
>
> "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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