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https://issues.apache.org/jira/browse/AURORA-1827?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Reza Motamedi updated AURORA-1827:
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Description:
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 interpolation when the sample
size is small or when the corresponding index to a percentile value is not an
integer.
was:
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.
> Fix SLA percentile calculation
> -------------------------------
>
> Key: AURORA-1827
> URL: https://issues.apache.org/jira/browse/AURORA-1827
> Project: Aurora
> Issue Type: Story
> Reporter: Reza Motamedi
> Assignee: 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 interpolation when the
> sample size is small or when the corresponding index to a percentile value is
> not an integer.
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