[
https://issues.apache.org/jira/browse/FLINK-12982?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Nico Kruber closed FLINK-12982.
-------------------------------
Fix Version/s: 1.10.0
Resolution: Fixed
merged in master via 4452be3
> Make DescriptiveStatisticsHistogramStatistics a true point-in-time snapshot
> ---------------------------------------------------------------------------
>
> Key: FLINK-12982
> URL: https://issues.apache.org/jira/browse/FLINK-12982
> Project: Flink
> Issue Type: Sub-task
> Components: Runtime / Metrics
> Reporter: Nico Kruber
> Assignee: Nico Kruber
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.10.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Instead of redirecting {{DescriptiveStatisticsHistogramStatistics}} calls to
> {{DescriptiveStatistics}}, it takes a point-in-time snapshot using an own
> {{UnivariateStatistic}} implementation that
> * calculates min, max, mean, and standard deviation in one go (as opposed to
> four iterations over the values array!)
> * caches pivots for the percentile calculation to speed up retrieval of
> multiple percentiles/quartiles
> This is also similar to the semantics of our implementation using codahale's
> {{DropWizard}}.
--
This message was sent by Atlassian Jira
(v8.3.2#803003)
