[THIN] Re: Off the chart latency
- From: "Jason Patten" <jasoncitrix@xxxxxxxxx>
- To: thin@xxxxxxxxxxxxx
- Date: Tue, 21 Aug 2007 10:12:37 -0400
I have tried this with a custom file, to disable the Caching and the
Compression. However I am not sure of the Custom ICA parameter to make sure
speedscreen is off.
On 8/21/07, Eric Foote <eric.foote@xxxxxxxxxxxxxxxxxxxxx> wrote:
>
> Keep in mind when shadowing is activated all caching, speedscreen and
> other optimizations are automatically disabled (since you cannot have these
> features active when two users are viewing the same session)
>
>
>
> Check the cache size of your local ICA client – if it is enabled and set
> to a percentage of the disk with a large HD – you may have a bitmap cache
> that has grown so large that it takes longer to read the cache than it would
> to just send the bitmap. Also make sure that your cache is pointed to a
> local disk not a network share.
>
>
>
> Try disabling all of the optimization features on the session and see if
> that helps.
>
>
>
> Eric
>
> We do...whatever it takes! <http://www.caretechsolutions.com>
>
> *Eric M. Foote*
> *Chief Technical Architect*
>
> *CareTech Solutions, Inc.*
> 901 Wilshire Drive, Suite 100
> Troy, MI 48084
>
> Eric.Foote@xxxxxxxxxxxxxxxxxxxxx
>
> tel:
> mobile:
>
> (248) 823-0914
> (313) 657-1799
>
>
>
>
>
>
>
>
>
> *From:* thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] *On
> Behalf Of *Jason Patten
> *Sent:* Tuesday, August 21, 2007 7:54 AM
> *To:* thin@xxxxxxxxxxxxx
> *Subject:* [THIN] Re: Off the chart latency
>
>
>
> I have Latency checker and am going to be trying to use it a little bit to
> see what I can see. However I have to rely on what the user tells me, if I
> shadow the latency checker session, the latency immediately drops to the
> latency of y session here on the LAN. (Verified this using a laptop and
> dial-up connection at the office), where if I shadow my LAN session from the
> dial-up, the latency goes UP...
>
> Any idea why that happens? (CUstomers report that when we shadow them the
> latency seems to go away)
>
> Also, I just disabled the session reliability, lets see if that helps.
>
> On 8/21/07, *Rick Mack* <ulrich.mack@xxxxxxxxx> wrote:
>
> Hi Jason,
>
>
>
> The big change between XP and CPS 4 in terms of the ICA client is ICA V2
> otherwise known as Session reliability. If your WAN has QOS set for ICA
> (port 1494) then ICA V2 on port 2598 is going to have a hard time.
>
>
>
> Try disabling session reliability on the servers and stand back ;-)
>
>
>
> regards,
>
>
>
> Rick
>
>
>
> www.commander.com
>
>
>
> On 8/21/07, *Eric Foote* <eric.foote@xxxxxxxxxxxxxxxxxxxxx > wrote:
>
> Grab a copy of Latency Checker from http://www.fcconsult.be/ and run it in
> your session that is having issues.
>
>
>
> Also you can look at ICA session latency from perfmon ICA Session object.
>
>
>
> Does the title bar of the ICA session show that Speedscreen is on?
>
>
>
> Eric
>
>
>
> *From:* thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] *On
> Behalf Of *Jason Patten
> *Sent:* Monday, August 20, 2007 2:53 PM
> *To:* thin@xxxxxxxxxxxxx
> *Subject:* [THIN] Re: Off the chart latency
>
>
>
> We are dealing with some serious latency issues here as well. Ping times
> below 100, but keyboard response can be as much as 15-20 seconds behind the
> keystrokes.
> Its only occuring with a small handfull of clients. And they only started
> complaing of it once we moved from MFXP to Presentation server 4.
>
> On 8/20/07, *Bernd Harzog* <berndh@xxxxxxxxxxxxxx> wrote:
>
> Some suggestions:
>
> 1. Do you have anything that monitors at the ICA level? In other
> words, something that is measuring the response time of ICA over the WAN
> link? Ping is very low level, and it can be fine while things at the
> applications level are not.
> 2. If you are not, or cannot do ICA monitoring, try HTTP monitoring
> instead. Again, try to see if there is a problem at the applications level
> of the protocol.
> 3. Someone already said this, but I recently saw 30 echo delays in
> an ICA client (fat and thin) that turned out to be caused by VOIP traffic
> running over the same IP link as the ICA traffic
>
>
>
> Cheers,
>
>
>
> Bernd Harzog
>
> Vice President and General Manager
>
> ProactiveWatch
>
> www.proactivewatch.com
>
> bharzog@xxxxxxxxxxxxxxxxxx
>
> 770-475-4249
>
>
>
> -----Original Message-----
> *From:* thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx]*On
> Behalf Of *Stratton, Doug ISMC:EX
> *Sent:* Thursday, August 16, 2007 7:10 PM
> *To:* thin@xxxxxxxxxxxxx
>
> *Subject:* [THIN] Off the chart latency
>
>
>
> T his is something I have not seen before.
>
> PROBLEM
>
> I have an office with 6 or 7 thin clients. (we have 1000's)
>
> Client is working then everything starts going extremely slow and
> eventually lost connection or more often what seems to be enormous KB/mouse
> delays (reflected by slow slow feedback to her screen what she types and
> what looks like to her erratic behaviour)
>
> I ping the tc and get constant 20-30 ms ping times. Does not look like
> "normal" latency problem.
>
> I check with smsconsole and the latency for the session is in the 10's of
> thousands.
>
> I have not seen this before where the latency thru that console does not
> also get reflected with pings.
>
> Saw a very odd part today. I was shadowing her and she started seeing
> this big delays while I was typing stuff. I was seeing everything real
> time.
>
> I am close to the servers. So I can only assume I am getting the echo
> real time and she is getting it way after. SMSconsole showed the 10's000
> delays.
>
> Can someone explain and suggest possible problem/solution. Why I see low
> pings but Hi latency in smssconsole? Fellow worker says that is ICA
> latency.
>
> OUR ENVIRONMENT
>
> W2k3 sp2
>
> Citrix PS 4 (upgraded from PS3 with 2005.04) R01/r02.0.1
>
> Office 2003 sp2
>
> Wyse TC s30
>
> I am told there are no wireless components.
>
> Client site has a 1.344m T1? With much bigger bandwidth
> downstream? (30-100M)
>
> WHAT WE HAVE TRIED
>
> We have had the cables all changed, routers/switches all upgraded.
>
> TC replaced, I have put kb and mouse delay settings on the tc. (ICA
> performance settings)
>
> Regards,
>
> *Doug Stratton*, Shared Service BC
>
> Service Desk Email:* **77000@xxxxxxxxx*
>
> Service Desk Tel:* **(250)387-7000*
>
>
>
>
>
> --
> Ulrich Mack
> www.commander.com
>
>
>
>
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