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https://issues.apache.org/jira/browse/KAFKA-203?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jun Rao closed KAFKA-203.
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> Improve Kafka internal metrics
> ------------------------------
>
> Key: KAFKA-203
> URL: https://issues.apache.org/jira/browse/KAFKA-203
> Project: Kafka
> Issue Type: New Feature
> Components: core
> Affects Versions: 0.8
> Reporter: Jay Kreps
> Assignee: Jun Rao
> Labels: tools
> Fix For: 0.8
>
> Attachments: kafka-203_v1.patch, kafka-203_v2.patch
>
>
> Currently metrics in kafka are using old-school JMX directly. This makes
> adding metrics a pain. It would be good to do one of the following:
> 1. Convert to Coda Hale's metrics package
> (https://github.com/codahale/metrics)
> 2. Write a simple metrics package
> The new metrics package should make metrics easier to add and work with and
> package up the common logic of keeping windowed gauges, histograms, counters,
> etc. JMX should be just one output of this.
> The advantage of the Coda Hale package is that it exists so we don't need to
> write it. The downsides are (1) introduces another client dependency which
> causes conflicts, and (2) seems a bit heavy on design. The good news is that
> the metrics-core package doesn't seem to bring in a lot of dependencies which
> is nice, though the scala wrapper seems to want scala 2.9. I am also a little
> skeptical of the approach for histograms--it does sampling instead of
> bucketing though that may be okay.
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