[THIN] Re: Disk Queue Length Question
- From: "Joe Shonk" <joe.shonk@xxxxxxxxx>
- To: <thin@xxxxxxxxxxxxx>
- Date: Mon, 8 Jun 2009 09:15:09 -0700
How many users are on this box? How much memory/cpu did you give each of
the VMs? Are you also redirecting the Application Data folder as well? Or
is it part of the roaming profile (cached locally)?
Joe
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of Webster
Sent: Monday, June 08, 2009 8:35 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Disk Queue Length Question
Greetings,
Have a customer having an issue with frozen sessions on a TS2003/XA5
x86server. The issue happens with both RDP and ICA. And happens remotely
or logged in to the console.
Issue: When using Adobe Acrobat 9.1 Pro to create PDFs from various form of
documents, the sessions freeze for very long periods of time. i.e. > 20
minutes
Info: TS/XA server is a VM under Hyper-V. My Docs and Roaming Profiles are
redirected to File Servers that are also VMs under Hyper-V.
My Docs and Roaming Profiles are stored on an EMC SAN connected via 4GB FC.
Both are configured for RAID5 as that is the only option available to them
until they do a major upgrade on the SAN sometime this summer.
Problem: Avg Disk Queue Length is > 1,300
Avg Disk Read > 4,500
Avg Disk Write > 22,000
Question: Of course I know that taking, on avg, 22 SECONDS to write a block
of data is going to cause MAJOR issues and is more than likely the cause for
the session hangs/freezes. But, on a FC SAN, are Avg Disk Queue Length and
or Current Disk Queue Length valid counters to monitor for a Terminal
Server/XenApp Server?
I am finding conflicting advice on whether the Disk Queue Length counters
are valid for either SANs or Roaming Profiles and redirected My Docs stored
on a SAN.
Thanks
Webster
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