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Hi,

When we are conserving the Average Response time from the Analysis reports. Which one we need to consider 90 percentile or Average Transaction Response time.

What is the difference 90 percentile Vs Average Response time.

Please clarify!

Thanks,

Raj

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Hi,

Yes, per your example, 9 is the 90th percentile value which means 90% of the data points are smaller than 9 and 10% are bigger than 9.

Otherwise, Average Response Time is (1+2+5+9+20)/5 = 7.4

Regards,

Chau

Chau Nguyen | SW Technical Support Consultant.

LoadRunner and Performance Center

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Re: What is the difference 90 percentile Vs Average Response time in Analysis Report

Hi,

The Average Transaction Response Time graph displays the average time taken to perform transactions during each second of the load test scenario run.

And the 90th percentile is the value for which 90% of the data points are smaller.

You can refer some threads as below for more information:

http://support.openview.hp.com/selfsolve/document/KM169562

Transactions/m-p/5643545/highlight/true#M2363

Regards,

Chau

Chau Nguyen | SW Technical Support Consultant.

LoadRunner and Performance Center

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Re: What is the difference 90 percentile Vs Average Response time in Analysis Report

Hi Chaun,

I agree, but my question is when we are making the descison, which one we need to take consider 90 percentile response times OR 100 % i.e Average Response Time from the Graph.

As my Understanding 90 % percentile fox Ex:If have response times like 1,2,5,9,20 .It omites the 20 sec's which has max response time.

**Average Response Time **: In the above example includes 20 sec's also and takes average of (1+2+5+9+20)/5

Which is one is the best.

In general corporate companies which one follows?

Please advise!

Thanks,

Rajani

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Re: What is the difference 90 percentile Vs Average Response time in Analysis Report

Hi,

It depends on each company. As my experience, we often follow to Average Response Time.

Regards,

Chau

Chau Nguyen | SW Technical Support Consultant.

LoadRunner and Performance Center

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Re: What is the difference 90 percentile Vs Average Response time in Analysis Report

Hi Chaun,

Thanks a lot!

Am I correct with the given example ?

Please confirm!

Thanks,

Rajani

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Hi,

Yes, per your example, 9 is the 90th percentile value which means 90% of the data points are smaller than 9 and 10% are bigger than 9.

Otherwise, Average Response Time is (1+2+5+9+20)/5 = 7.4

Regards,

Chau

Chau Nguyen | SW Technical Support Consultant.

LoadRunner and Performance Center

If you find that this or any other post resolves your issue, please be sure to mark it as an accepted solution.

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Re: What is the difference 90 percentile Vs Average Response time in Analysis Report

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Re: What is the difference 90 percentile Vs Average Response time in Analysis Report

90% value would be the best.

For example, avg of 4, 6 is 5 and avg of 1,9 is also 5..But, average value is justified in the first set rather than in the second set, because, 5 is closer to 4 & 6 compared to 1 & 9.

So, I mean to say, Avg values are not precise or ideal when comapred to 90% values.