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https://issues.apache.org/jira/browse/KAFKA-10177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17143599#comment-17143599
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Tom Bentley commented on KAFKA-10177:
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Have you considered using HrdHistogram, or reimplementing some of the ideas
from it if you don't want to add it as a dependency?
> Replace/improve Percentiles metrics
> -----------------------------------
>
> Key: KAFKA-10177
> URL: https://issues.apache.org/jira/browse/KAFKA-10177
> Project: Kafka
> Issue Type: Improvement
> Components: metrics
> Reporter: Sophie Blee-Goldman
> Priority: Major
>
> There's an existing – but seemingly unused – implementation of percentile
> metrics that we attempted to use for end-to-end latency metrics in Streams.
> Unfortunately a number of limitations became apparent, and we ultimately
> pulled the metrics from the 2.6 release pending further
> investigation/improvement.
> The problems we encountered were
> # Need to set a static upper/lower limit for the values
> # Not well suited to a distribution with a long tail, ie setting the max
> value too high caused the accuracy to plummet
> # Required a lot of memory per metric for reasonable accuracy and caused us
> to hit OOM (unclear if there was actually a memory leak, or it was just
> gobbling up unnecessarily large amounts in general)
> Since the Percentiles class is part of the public API, we may need to create
> a new class altogether and possibly deprecate/remove the old one.
> Alternatively we can consider just re-implementing the existing class from
> scratch, and just deprecating the current constructors and associated
> implementation (eg the constructor accepts a max)
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