[
https://issues.apache.org/jira/browse/AURORA-1827?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15691040#comment-15691040
]
Zameer Manji commented on AURORA-1827:
--------------------------------------
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.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
