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From "Joshua Cohen (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AURORA-1827) Fix SLA percentile calculation
Date Wed, 23 Nov 2016 18:27:58 GMT

     [ https://issues.apache.org/jira/browse/AURORA-1827?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Joshua Cohen updated AURORA-1827:
---------------------------------
    Labels: newbie sla  (was: sla)

> Fix SLA percentile calculation 
> -------------------------------
>
>                 Key: AURORA-1827
>                 URL: https://issues.apache.org/jira/browse/AURORA-1827
>             Project: Aurora
>          Issue Type: Story
>            Reporter: Reza Motamedi
>            Priority: Trivial
>              Labels: newbie, sla
>
> The calculation of mttX (median-time-to-X) depends on the computation of percentile values.
The current implementation does not behave nicely with a small sample size. For instance,
for a given sample set of  {50, 150}, 50-percentile is reported to be 50. Although, 100 seems
a more appropriate return value.
> One solution is to modify `SlaUtil` to perform an extrapolation when the sample size
is small or when the corresponding index to a percentile value is not an integer. 



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