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How to calculate the baseline response

  • gbreit
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05 Feb 2013 09:31 #751

From the document:
To determine this dynamic threshold, first the average baseline response time is calculated. This is done by averaging the response time of the first 15 Login VSI measurements.

So what do you mean "the first 15 Login VSI measurements"? If I start 100 sessions, the LoginVSI will run 15 session first to caculate the averaging response time then run all 100 sessions?

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05 Feb 2013 10:14 #753

Hi GB,

The baseline is no separate test. So, it is not first a baseline test and then a benchmark test. The baseline is part of the benchmark test.The baseline is taken from the first 15 measurements. Independent of the total number of (benchmark) test sessions.

I hope that clarifies things? If not, we are more than happy to further detail explain.

Regards,

Omar.

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  • gbreit
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06 Feb 2013 01:52 #760

Omar,
Thanks for your explanation. But I can't catch your meaning. Could you explain what are the first 15 measurements? If I start less than 15 seesions, how could it caculate the baseline?

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06 Feb 2013 12:17 #772

Hi GB,

Then the average VSImax response time is calculated based on the amount of active Login VSI users logged on to the system. For this the average VSImax response times need to consistently higher than a dynamically calculated threshold.

To determine this dynamic threshold, first the average baseline response time is calculated. This is done by averaging the response time of the first 15 Login VSI measurements.

The formula for the dynamic threshold is: Avg. Baseline Response Time x 125% + 3000. As a result, when the baseline response time is 1800, the VSImax threshold will now be 1800 x 125% + 3000 = 5250ms. Calculating VSImax

If its a test less than 15 sessions; it will calculate the baseline for that total amount of the test sessions.

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  • gbreit
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07 Feb 2013 07:40 #776

Omar,
I still couldn't understand "first 15 session". Take a test result for example,



Please see the session_count. There're only 4 sessions(users) log for session_count 15. I think it should have 15 sessions(users) here and they're all active running at that time. Please correct me if I am wrong.

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07 Feb 2013 09:46 #777

Hi GB,

I have send you the corrected information via e-mail.

Regards,

Omar

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  • gbreit
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18 Feb 2013 09:36 #797

Could you explain the session_count? Does it mean the total active sessions in a period?

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19 Feb 2013 13:31 #800

That is correct GB. It is the total active sessions in a period.

Regards,

Omar

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  • neokylin
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25 Jul 2013 09:03 #1323

if i have less than 15 sessions,how to calculate the maxVSI

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25 Jul 2013 09:49 #1324

Neo,

if you have less then 15 it will calculate the total amount.
example; if you test with 8 it will calculate the 8
example; if you test with 14 it will calculate the 14

Omar

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  • neokylin
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28 Jul 2013 06:24 #1334

hi,Omar
If I start with 10 sessions,how to calculate the baseline ?
When I run a test with 10 sessions, I got the results: vsimax=8, show as the attached file,I'm not sure if this test has passed, why I got vsimax result when session count is less than 15

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31 Jul 2013 15:35 #1344

Hi Neo,

Two things you mentioned/mixing here: (of course they are related to each other to calculate all the numbers)

1=Baseline
2=VSImax

v3.x
1=Baseline gets calculated from the lowest/fastest 15 measurements within the whole test
1.1=If the session count/amount is below 15, baseline is calculated from the active amount at that point

example; if you test with 8 it will calculate the 8
example; if you test with 14 it will calculate the 14

v3.x
2=Of course the baseline has impact on VSImax results, but the mechanism is not the same. VSImax is based on more calculations, weights etc etc.

Let me know if this is what you was looking for?

PS, i could send you an sheet if that is required

Thanks,

Omar

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  • neokylin
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01 Aug 2013 07:47 #1347

the lowest/fastest 15 measurements,what is the meaning of measurement?is it a record in the result of Raw data?

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01 Aug 2013 15:15 #1348

yes. RAW data of the VSI Timer actions we do

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  • neokylin
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02 Aug 2013 05:38 #1349

hi,
i still have some issue about how to calculate the baseline

If I have 14 conversation,to calculate the baseline I should use the 15 records whose session_count is 14 and has the lest total_response in the Raw Data as my measurements。am I right?

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