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https://issues.apache.org/jira/browse/HIVE-22446?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stamatis Zampetakis updated HIVE-22446:
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Fix Version/s: (was: 4.0.0)
I cleared the fixVersion field since this ticket is not resolved. Please review
this ticket and if the fix is already committed to a specific version please
set the version accordingly and mark the ticket as RESOLVED.
According to the JIRA guidelines
(https://cwiki.apache.org/confluence/display/Hive/HowToContribute) the
fixVersion should be set only when the issue is resolved/closed.
> Make IO decoding quantiles counters less contended resource.
> ------------------------------------------------------------
>
> Key: HIVE-22446
> URL: https://issues.apache.org/jira/browse/HIVE-22446
> Project: Hive
> Issue Type: Improvement
> Components: llap
> Reporter: Slim Bouguerra
> Assignee: Slim Bouguerra
> Priority: Major
> Attachments: HIVE-22446.patch
>
>
> Currently LLAP IO relies on Hadoop Lock-based quantiles data structure and
> updates the IO decoding sample on a per batch based using.
> {code}
> org.apache.hadoop.hive.llap.metrics.LlapDaemonIOMetrics#addDecodeBatchTime
> {code}
> via
> {code}
> org.apache.hadoop.hive.llap.io.decode.EncodedDataConsumer#consumeData
> {code}
> This can be a source of thread contention.
> Goal of this ticket is to reduce the frequency of updates to avoid major
> bottleneck.
>
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