+ Post New Thread
Results 1 to 8 of 8
Thin Client and Virtual Machines Thread, Terminal services/citrix random freezes in Technical; I have a random thing happening on my terminal services boxes where the sessions randomly lag by a few seconds. ...
  1. #1

    localzuk's Avatar
    Join Date
    Dec 2006
    Location
    Minehead
    Posts
    17,529
    Thank Post
    513
    Thanked 2,406 Times in 1,862 Posts
    Blog Entries
    24
    Rep Power
    822

    Terminal services/citrix random freezes

    I have a random thing happening on my terminal services boxes where the sessions randomly lag by a few seconds. I've enabled disk caching as suggested by various bods, and i've fixed everything that was being thrown up in the event viewer so can't see what's causing it.

    The servers are highly specced, with 4GB (well, 3.4GB after windows messes with it all), dual 2.4Ghz quad core xeon's, and dual 143GB SAS 10k rpm hard drives, and gigabit connections.

    This problem occurs even when there are only 1 or 2 people logged on.

    So, any suggestions would be much appreciated!!

  2. #2


    Join Date
    Jan 2006
    Posts
    8,202
    Thank Post
    442
    Thanked 1,032 Times in 812 Posts
    Rep Power
    339
    sounds very much like a network problem to me.
    do you have a network baseline that you can compare with?

  3. #3
    Axel's Avatar
    Join Date
    Apr 2008
    Posts
    239
    Thank Post
    32
    Thanked 43 Times in 32 Posts
    Rep Power
    21
    Does this happen with both thin-clients and PCs running RDP....?

  4. #4

    localzuk's Avatar
    Join Date
    Dec 2006
    Location
    Minehead
    Posts
    17,529
    Thank Post
    513
    Thanked 2,406 Times in 1,862 Posts
    Blog Entries
    24
    Rep Power
    822
    The same problem happens with RDP sessions also.

    How would I identify a network issue? The switches are no-where near even half utilisation. The network utilisation on the server is also minimal (ie. maxing out at about 4%, averaging 0.7%!), even when it has 20 clients attached.

  5. #5


    Join Date
    Jan 2006
    Posts
    8,202
    Thank Post
    442
    Thanked 1,032 Times in 812 Posts
    Rep Power
    339
    Ideally you already have a baseline from which to compare....
    Use (something like) iperf SourceForge.net: Iperf to measure your network performance.

    You could probably do a quick check by doing an aggressive ping (sudo ping -f target) on a *nix. this will quickly show up if any packets are being dropped.

  6. #6

    localzuk's Avatar
    Join Date
    Dec 2006
    Location
    Minehead
    Posts
    17,529
    Thank Post
    513
    Thanked 2,406 Times in 1,862 Posts
    Blog Entries
    24
    Rep Power
    822
    After doing a ping -f on the server for 10 minutes, I can report zero packets lost.

    However, when I do a wireshark capture on the server, most of the ica packets are coming up as checksum incorrect (possibly due to checksum offloading). Should I disable checksum offloading?

  7. #7


    Join Date
    Jan 2006
    Posts
    8,202
    Thank Post
    442
    Thanked 1,032 Times in 812 Posts
    Rep Power
    339

  8. #8

    localzuk's Avatar
    Join Date
    Dec 2006
    Location
    Minehead
    Posts
    17,529
    Thank Post
    513
    Thanked 2,406 Times in 1,862 Posts
    Blog Entries
    24
    Rep Power
    822
    That seems to say 2 things... ie. 'OMG! That's awful' and 'No worries, that's just Checksum offloading'.

    I may disable it and see if it solves this issue.

SHARE:
+ Post New Thread

Similar Threads

  1. Replies: 8
    Last Post: 23rd April 2008, 10:33 PM
  2. Terminal Services
    By HodgeHi in forum Windows
    Replies: 0
    Last Post: 6th March 2008, 11:00 AM
  3. Login Freezes For Terminal Services
    By Pear in forum Windows
    Replies: 5
    Last Post: 24th January 2007, 05:31 PM
  4. Terminal Services
    By wesleyw in forum Thin Client and Virtual Machines
    Replies: 2
    Last Post: 30th June 2006, 12:34 PM
  5. Terminal Services
    By faza in forum Windows
    Replies: 15
    Last Post: 1st June 2006, 10:37 AM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •