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Question by Xiaoping L. · Jan 20, 2015 at 01:29 PM ·

Same BT shows different percentiles in Application overview and chart

Hi All, 

When i add my own BT to application overview, and compare the response time(50 percentile)/slowest 10% response time(90 percentile) with the same percentiles of charting the same BT, they do not match up at anytime, how are the percentiles calculated at both places?

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Answer by Xiaoping L. · Jan 27, 2015 at 11:15 AM

Hi Andi,

It's well enough to know the difference is due to different resolution, thanks!

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Answer by Andreas G. · Jan 27, 2015 at 12:09 AM

Hi

Sorry for the late answer. So - the Percentila Values for the regular measures are calculated per hour. The percentiles for the Baselines are calculated more frequently and is therefore more granular. There is a special algorithm behind that which depends on the actual load.

But - to answer your question: the difference is the different resolution on how often the baseline is calculated. 1 hour resolution wouldnt work for the baseline as we would get the alerts too late.

If you need a more detailed description on the actual algorithm used I can try to hook you up with the technical engineering team.

Andi

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