How to get 90th percentile transaction time

[Aleksandar Nikolovski]

Hi All, 

I am doing a performance testing using HP Performance Center. Need to know if there is any way to see the 90th percentile transaction time? 

I have previous knowledge in performance testing using Visual Studio and there I can see any percentile very easily. In Visual Studio Ultimate you have 90%, 95% by default in the transaction response time table. 

There has to be something like that in HP Performance center right?

Thanks

[V.M.Guruprasath]

Hi Nikolovski,

Yes we have.

Under transaction summary in the Analysis report we can find a column called 90 percent which gives the 90th percentile trasnaction response time. Please find attached a .png image for further details.

This is a configurable value and it can be configured for 95%, if required.

Thanks and Regards,

V.M.Guruprasath

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[Aleksandar Nikolovski]

I just wanted to post that I found the column with 90th percentile don't even know how I mist this the first time:)

Thank you very much for yore response. 

Regards

Aleksandar

[prasenjit dutta]

but could anyone tell me what is the basic calculation to find that 90th percentile.......I got many definition but non is found to be correct,........

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Prasenjit

[utkarsh sinha]

arrange all the response times for a particular transaction in ascending order.Say you have 10 values,then the 9th value indicates the 90th percentile RT value for that particular transaction.Its always advisable to look for into 90th percentile value as it brings out the real picture .Avg RT can give a wrong indication if you have outliers included in your metrics. 

[Floris Kraak]

On Sun, May 29, 2011 at 10:44 AM, prasenjit dutta
<prasen...@gmail.com> wrote:
> but could anyone tell me what is the basic calculation to find that 90th
> percentile.......I got many definition but non is found to be
> correct,........
>

This will help:
http://queue.acm.org/detail.cfm?id=1854041

Regards,
Floris
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