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Vcenter Performance Monitoring - need help with results

Posted on 2014-02-06
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Last Modified: 2014-02-06
Hello Experts - I've recently run into a small performance problem in my Citrix environment and could use some help sorting out the results from setting up performance counters in Vcenter.  I've prepared a spreadsheet which is attached here containing the data.  My main issue is that I'm not sure what constitutes a healthy range for many of the values that have been captured.  I've included stats for both production Citrix servers, the ZDC, and another server running 2003 that has far less use which I've titled "Benchmark."  The Citrix environment consists of two production servers and the ZDC (Presentation Server 4.5) running on Server 2003.  Each server has been allocated 4GB of RAM and 4 virtual sockets with 1 core each (2.7GHz).  Users are complaining of slow performance overall but specifically very slow printing.  I've seen it take a full minute and a half to render one print job that was less than 5MB.

I'd very much appreciate any insight into the stats in the excel document.  If there are other counters I should have included please let me know and I can run another report with the additional data.  Thanks in advance for any assistance!
Citrix-Performance--public-.xlsx
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Andrew Hancock (VMware vExpert / EE MVE^2) earned 2000 total points
ID: 39840026
It was always recommended to use 2 vCPU, and scale out your server farm with 2003, because you maybe limited to 4GB of RAM.

Are the issue print jobs?

with this specification, we only ever managed to get 20-25 concurrent users per server, before high cpu caused performance issues.

How many concurrent users do you have?

(on the same hardware with no hypervisor, we would get 75 concurrent users, e.g. Windows 2003 Quad Core CPU, 4GB RAM).

I would increase the servers in the farm, and use 4GB RAM, and 2 vCPU.

My EE Article can guide you

HOW TO:  Performance Monitor vSphere 4.x or 5.0
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by:First Last
ID: 39840068
Hi Andrew - The main issue is appearing as slow print jobs but I'm seeing slow performance overall.  We're only publishing apps, no desktops, and I have 28 sessions on one server and 31 on the other.

I could add another server to the farm but was unsure about how the licensing works in that situation.  Do you know if I'd need to purchase additional licenses (aside from the OS) to run another instance of  Citrix?  I'll go over the guide now, thanks!
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LVL 123
ID: 39840388
Licensing is concurrent user based (or was!).

So you can have as many Citrix Servers as you like, still need an OS License.

But all your Citrix Licenses are pooled in the farm.
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by:First Last
ID: 39840411
Thanks Andrew!!
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LVL 123
ID: 39840448
Dan

No problems, please come back....

It's just been 8+ years since I dealt with MetaFrame 4.5 on 2003, and VMware!

It's been flushed from cache!
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