Hi, we have some latency problems on our Citrix XenDesktop 6.5 sessions (regular 5sec freeze) Here is a sample of captured packets :
We can see 44 DUP ACK sent from the Citrix client to the server during 200 ms.
Is this the reason of our latency ?
How can we reduce that ?
asked 29 Jul ‘14, 01:41
I don't think the Dup ACKs are causing the 5 second freeze if that's what you are asking. The 5 second freezes and Dup ACKs could have the same cause. To get a delay of 5 seconds due to a transport issue you would see either a TCP window issue or several TCP Retransmissions with significant delays between each.
I notice the client seems to be advertising a Window of 610. I guess we've missed the session start and so Wireshark doesn't have scaling info, hence the strange value. Anyway the server must think the window is bigger coz it sends 1,460 bytes.
Where was the trace data captured?
answered 04 Aug '14, 15:31