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  1. #1
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    What to Measure in Load and Performance testing

    Sometimes I ask this question to myself and now asking you, what are the different measures that are mission critical in Performance testing and how to analyze their values from stability and scalability view point
    Sree

  2. #2
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    Re: What to Measure in Load and Performance testing

    Unfortunately, that depends!

    If you're testing a web site, the page load rate might be a critical measure.

    If you're testing a shopping cart, your critical measure might be how long it takes to move from the page where the user enters his/her credit card number to the confirmation page. (Tests have shown that a user will wait almost indefinitely once they've entered their credit card number, but it's still good to know.)

    You might want to track successful completions of a given process every time slice, since you can then extrapolate that an average of 10 successful transactions every 6 minutes yields 100 successful transactions every hour. And you can use this to tell if successive releases of your product are getting faster or slower.

    It varies so much from system to system and product to product. The only consistency I've seen is that management and developers want performance testing, but they haven't a clue what they want it to tell them.

    ------------------
    Pat Hyland
    Pat Hyland

  3. #3
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    Re: What to Measure in Load and Performance testing

    <BLOCKQUOTE><font size="1" face="Verdana, Arial, Helvetica">quote:</font><HR>Originally posted by PatHyland:
    Unfortunately, that depends!

    If you're testing a web site, the page load rate might be a critical measure.

    If you're testing a shopping cart, your critical measure might be how long it takes to move from the page where the user enters his/her credit card number to the confirmation page. (Tests have shown that a user will wait almost indefinitely once they've entered their credit card number, but it's still good to know.)

    You might want to track successful completions of a given process every time slice, since you can then extrapolate that an average of 10 successful transactions every 6 minutes yields 100 successful transactions every hour. And you can use this to tell if successive releases of your product are getting faster or slower.

    It varies so much from system to system and product to product. The only consistency I've seen is that management and developers want performance testing, but they haven't a clue what they want it to tell them.
    <HR></BLOCKQUOTE>

    We can even find out how the page load rates increase (or the server's performance decreases) with the load on server increasing, by increasing the number of virtual users gradually over a period of time. This would be helpful in finding out the cut-off load amounts at which the servers crash or under-perform.

    And also the statistics gathered over two or three cycles of testing, could be used to form the standards for the load/performance testing and they could be used in later cycles to find out how and when the server performs below the standard.

    These are some uses in general and as Pat says, the exact nature of tests and measures
    definitely depends and varies from product to product.

    Thanks,
    Raghu.

    ------------------

 

 

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