[THIN] Re: latency

  • From: Frank Monroe <Frank.Monroe@xxxxxxxxxxx>
  • To: "'thin@xxxxxxxxxxxxx'" <thin@xxxxxxxxxxxxx>
  • Date: Thu, 3 Oct 2002 16:42:59 -0400

I have no raid controller.  I am using Windows 2000 software mirroring.  I
have run the systems with no mirror and I still have the problem.

-----Original Message-----
From: Dan Samaan [mailto:dsamaan@xxxxxxxxxxxxxxxx]
Sent: Thursday, October 03, 2002 4:36 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: latency



Tiffany, you are the second person who has claimed this.  A Matt Kroll
told me the same thing, but MS, Citrix and myself feel that isn't it.  I
put in a test box with 1 hard drive with no RAID controller and got
better performance.

Daniel J. Samaan=20
Senior Network/Security Engineer - CCSE, CCA, CCNA, MCSE
dsamaan@xxxxxxxxxxxxxxxx

-----Original Message-----
From: Tiffany Ernest [mailto:tiernest@xxxxxxxxx]=20
Sent: Thursday, October 03, 2002 3:22 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: latency


We had this problem but it was because of the
read/write cache settings on our array controller
(Compaq Smart Array 431).  We had to upgrade to a
controller that we could change the settings for the
accelerator ratio (make it 50/50).  After we made that
change the latency went away.
tiffany=20
--- Frank Monroe <Frank.Monroe@xxxxxxxxxxx> wrote:
>=20
> The MS hotfixes and registry setting were applied.=20
> The Citrix hotfix was
> not applied because I have the behavior even though
> that feature is turned
> off.
>=20
> -----Original Message-----
> From: Erik Gerard [mailto:GERARDE@xxxxxxx]
> Sent: Thursday, October 03, 2002 4:15 PM
> To: thin@xxxxxxxxxxxxx
> Subject: [THIN] Re: latency
>=20
>=20
>=20
> Did you try the two MS hotfixes and the necessary
> Reg edit? What about the =3D
> Citrix hotfix?
>=20
> >>> Frank.Monroe@xxxxxxxxxxx 10/03/02 03:44PM >>>
>=20
> I saw this when you originally posted.  We tried
> turing off the time zone
> feature entirely.  But it did not fix the problem
> here.
>=20
> -----Original Message-----
> From: Erik Gerard [mailto:GERARDE@xxxxxxx]=3D20
> Sent: Thursday, October 03, 2002 12:54 PM
> To: thin@xxxxxxxxxxxxx=3D20
> Subject: [THIN] Re: latency
>=20
>=20
>=20
> We have a farm w/ 75+ that we upgraded from
> Win4.0TSE/MF1.8 to Win2k/MF-XPe=3D
> =3D3D
> , that was having a critical problem. Periodically,
> we would see the =3D3D
> processor fall to almost 0% utilization and the
> users would experience a =3D
> =3D3D
> 5-30 second delay in keyboard response or
> pull-down/pop-up menus, although =3D
> =3D3D
> screen refreshes were fine. It was severe enough
> that we had to roll =3D3D
> back.=3D3D20
>=20
> We applied the following MS HotFixes: Q317357 &
> Q320261. The later =3D3D
> required modifying the Registry Flush rate from the
> default of 5 sec. to =3D
> =3D3D
> 30 sec. While this reduced the problem from
> happening every 5-8 minutes to =3D
> =3D3D
> once every 90 minutes, it did not eliminate it all
> together.=3D3D20
>=20
> After much hassle attempting and finally getting a
> Live Remote Debug and =3D
> =3D3D
> Kernel Memory Dump (can't have more than 2GB
> physical RAM and must only =3D
> =3D3D
> have a single hard drive!), we found out that
> Citrix' TZHOOK.DLL was a =3D3D
> part of the problem.=3D3D20
>=20
> This DLL tracks the time zones for each user session
> and can be turned off =3D
> =3D3D
> in the Farm Properties of the CMC. Once we did that,
> our processor =3D3D
> utilization nose dived from 80% to 25% for 90
> users.=3D3D20
>=20
> There may also be a fix from Citrix. See below:
>=20
> "Issue with latency and slow logins with Epicare
> application and XP on =3D3D
> Windows 2000".Can you please apply the following
> Hotfix along with the =3D3D
> required Registry Change for this issue and let me
> know the results.
>=20
> Please download Hotfix XE102W012 from
> www.citrix.com=3D3D20=3D20
>=20
> Apply: Readme Line Item# 3
>=20
> 3. Some third-party applications became unresponsive
>     or otherwise behaved in an unpredicatable or
>     undesired manner. This is related to the way
> these
>     applications support API hooking. The problem
>     is dependent upon how these applications are
>     implemented. To prevent problematic programs
> from
>     using API hooking, set the following registry
>     value.
>=20
>     WARNING! Using Registry Editor incorrectly can
> cause
>     serious problems that may require you to
> reinstall
>     your operating system. Citrix cannot guarantee
> that
>     problems resulting from the incorrect use of
>     Registry Editor can be solved. Use Registry
> Editor
>     at your own risk.
>=20
>     Navigate to the following registry key:
>=20
>     HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\CtxHook
>     Value Name: ExcludedImageNames
>     Type: Reg_SQ
>     Value: Badapp1.exe, Badapp2.exe, Badapp3.exe
>     [From Hotfix XE102W012][#257394]
>=20
> I hope some of you will find this helpful and won't
> have to go through the =3D
> =3D3D
> long, painful process we did.=3D3D20
>=20
> Erik
>=20
> >>> CMSchneider@xxxxxxxxx 10/03/02 12:44PM >>>
>=20
> We are struggling with the typing delay a few
> seconds.
>=20
> -----Original Message-----
> From: Frank Monroe
> [mailto:Frank.Monroe@xxxxxxxxxxx]=3D3D20=3D20
> Sent: Thursday, October 03, 2002 11:42 AM
> To: 'thin@xxxxxxxxxxxxx'=3D3D20=3D20
> Subject: [THIN] Re: latency
>=20
>=20
>=20
> Hello,
>=20
> Are you talking about echo delay or actual pauses
> for a few seconds while
> typing?
>=20
> -----Original Message-----
> From: rose.ratliffe@xxxxxxxxxxxxxxxxxx=3D3D20=3D20
> [mailto:rose.ratliffe@xxxxxxxxxxxxxxxxxx]=3D3D20=3D20
> Sent: Thursday, October 03, 2002 11:37 AM
> To: thin@xxxxxxxxxxxxx=3D3D20=3D20
> Subject: [THIN] latency
>=20
>=20
>=20
> Hi,
>=20
> I am having problem with latency in my XPa /W2K
> environment.  It occurs in
> both when using Lotus Notes and Word.  It has
> started getting bad again =3D
> =3D3D
> now
> that all the staff is back from holidays.
>=20
> I have done some searching on thethin archives, and
> found reference to "a
> small program that measures latency" but I was
> unable to find this tool in
> the downloads.  Anybody know where I can get this to
> objectively measure
> the latency?
>=20
> We do hae speedscreen defined, and I have seen
> discussion regarding =3D3D
> setting
> the cursor blink rate (although I'm unclear whether
> that should be set =3D3D
> high
> or low).  I am also going to go looking around
> tweakcitrix.com, but still =3D
> =3D3D
> I
> would appreciate any suggestions from you folks.
>=20
> Thanks.
>=20
> Rose
>
************************************************************************
***=3D
> =3D3D
> *
> *************
>=20
>  Rosemarie J. Ratliffe                      =20
> E-mail:
> rose.ratliffe@xxxxxxxxxxxxxxxxxx=3D3D20=3D20
>  Manager Information Systems          Tel: (780) 482
> 2626
>=20
=3D=3D=3D message truncated =3D=3D=3D


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server-based questions, issues and incidents.
http://www.99point9.com
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