[THIN] KB: CTX103277 - ICA and Terminal Server Sessions Hang
- From: "Jim Kenzig http://thethin.net" <jimkenz@xxxxxxxxxxxxxx>
- To: <thin@xxxxxxxxxxxxx>
- Date: Fri, 30 Jan 2004 00:37:41 -0500
CTX103277 - ICA and Terminal Server Sessions Hang
This document was published at:
http://support.citrix.com/kb/entry.jspa?externalID=CTX103277
Document ID: CTX103277, Created on: Jan 20, 2004, Updated: Jan 21, 2004
Products: Citrix MetaFrame XP 1.0 for Microsoft Windows 2000, Citrix
MetaFrame 1.8 for Microsoft Windows 2000
Symptom
ICA sessions may hang due to RAID controller configuration.
You may find that ICA and Terminal Server sessions hang for a period of time
and then return to normal. During this period, the session will not accept
keyboard input.
One possible reason for this may be the servers? RAID controller
configuration.
Background
Some hardware models have an integrated raid controller. The controller
acceleration ratio is frequently set to 100% READ. You can verify this by
using your hardware vendors? RAID array configuration utilities.
Frequently integrated RAID controllers do not allow you to change the
acceleration ratio.
To verify that you are experiencing this particular issue, use Performance
Monitor to change the proportions of the graph to aid in monitoring.
1. Open Performance Monitor on the server console while users are connected.
2. Click the plus ( + ) button at the top of the graph area.
3. From the Processor Performance object, select '%Processor Time.
4. From the Physical Disk Performance object, select Add '%Disk Time.
5. Right-click anywhere in the graph area, select Properties, then the Graph
tab. Change the Vertical scale maximum to 1000 and the minimum to 300.
Large disk spikes will occur if the Terminal Server sessions are
experiencing the problem.
Conclusion
If you are experiencing this issue, change the acceleration ratio to a
read-write ratio of 50:50. If you have an integrated RAID controller and the
ratio cannot be changed, check with your hardware vendor to ascertain if
there is an add-on that will allow you to do so.
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