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chadd25

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Citrix 4.5 Freezing at random times

I have a presentation Server 4.5 farm.  Each day, we are seeing random system freezes where everyone on a particular server freezes up.  It is happening on only one server at a time per day.  We publish desktops.  The three servers are identical.  It seems to happen on a different server each day.  That leads me to believe it is a user profile issue.  We use roaming profiles.  

On a seperate computer, I am using performance monitor to monitor each Citrix server.  I have attached a screen shot of performance monitor.  You will see in the top graph a flat line when the system locks up.  So far I have:

Disabled realtime protection
I have been rebooting each night
Ran defrag a few times - disks look good
Installed all the latest citrix updates
Installed all the latest Microsoft updates

Does anyone have any ideas???
FlatLine.jpg
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chuckyh
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Install Spotlight on Windows and see if you can get a little more information on what's going on when the server freezes. It may be waiting on disk or something else.
http://www.quest.com/spotlight-on-windows/
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KrAzY

When you see the "flatline", can you check the processes tab to see if there is a single process that's "stuck" at 30% (30% is what I saw in the screensot).
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I will try to catch it when it is happening...  Good idea.  I am also researching this post.  Has anyone ever heard of this?  http://www.brianmadden.com/Forum/Topic/95726

1. What hard drives and array controller are you using?
2. What RAID level are you using?
2. Does your RAID controller have BBWC (Battery Backup Write Cache)?
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chadd25

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We had the same issue
Windows 2003 x64 SP2 all patched
Citrix XenApp 4.5 with HRP 2
Our Citrix servers freezes random. citrix Support and Microsoft support doesn't have a solution.
Finally we installed HRP 3 on all our servers two weeks ago.

Problem solved, never an freezing server in our enviroment