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Zameer Manji commented on AURORA-1827:
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I upgraded us to Guava 20. It has a [Quantiles|http://google.github.io/guava/releases/20.0/api/docs/com/google/common/math/Quantiles.html]
class and a [Stats|http://google.github.io/guava/releases/20.0/api/docs/com/google/common/math/Stats.html]
class that could be very helpful here.
> 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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