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Posted to issues@aurora.apache.org by "Reza Motamedi (JIRA)" <ji...@apache.org> on 2016/11/24 06:38:58 UTC
[jira] [Assigned] (AURORA-1827) Fix SLA percentile calculation
[ https://issues.apache.org/jira/browse/AURORA-1827?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Reza Motamedi reassigned AURORA-1827:
-------------------------------------
Assignee: Reza Motamedi
> 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 extrapolation when the sample size is small or when the corresponding index to a percentile value is not an integer.
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