[THIN] Re: Performance Metrics
- From: "Timothy Mangan" <tmangan@xxxxxxxxxxxx>
- To: <thin@xxxxxxxxxxxxx>
- Date: Tue, 6 Apr 2004 13:44:43 -0400
The performance monitor is a good tool to help determine *why* the system is
slow. Primarily: is it memory (paging), CPU, or I/O. But the problem most
have with the tool is that there isn't a fixed "this is good" or "this is
bad" value for any of the parameters. The usefulness that you of the
performance monitor increases as you use it, especially under different
scenarios - making it a hard tool to just pick up and use when you have a
problem. Another usefulness is that when you are logging the info, you can
try to correlate complaints to observable changes in values.
Measuring user performance is what I usually call "perceived performance".
(See white paper www.tmurgent.com\images\PerceivedPerformance.pdf [warning,
link may wrap] and/or Performance white paper on Brian Madden's site). The
CTSK or other tools can be used for this. Basically, you want to define
what a "typical user task" is and time how long it takes. I often use
home-grown tools that create a session, run a simple app, and logoff. Given
a baseline measurement (not good nor bad, but "normal"), now you can try to
determine what activities make it bad, or alternatively what changes can you
make to improve it.
Finally, service versus network. Divide and conquer. Citrix WMI provider
gives you session values such as bandwidth and latency.
Good luck!
Tim
Timothy R. Mangan - Founder, TMurgent Technologies
tmangan@xxxxxxxxxxxx www.tmurgent.com (+1)781.492.0403
-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of Woodward, Michael
Sent: Tuesday, April 06, 2004 10:39 AM
To: 'thin@xxxxxxxxxxxxx'
Subject: [THIN] Performance Metrics
I asked this question before but I am going to ask it in a different way
this time.
What is the best way to measure performance on a Citrix server? I have
complaints from users stating their session is slow, but I have to find a
way to answer the following questions:
1. 'How slow is slow?'
2. 'Is it due to the load on the servers?'
3. 'How do we know it is not the network?'
I have been directed to the Citrix Server test kit but this looks like it is
only testing performance of hardware performing specific scripts by a
certain number of users.
What about measuring what is occurring right now on my servers? And maybe
this is a dumb question but if performance monitor is the answer what
counters should I be looking at for this information? Is performance
monitor the best tool at measuring these things?
-----
C. Michael Woodward
Mid-Tier Support
Sun Chemical
Cincinnati, Ohio 45232
* 513.681.5950 x 576
* Michael.Woodward@xxxxxxxxxxxxxx
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