[THIN] Re: Off the chart latency
- From: "Jason Patten" <jasoncitrix@xxxxxxxxx>
- To: thin@xxxxxxxxxxxxx
- Date: Tue, 21 Aug 2007 07:54:28 -0400
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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