[jira] [Updated] (HIVE-22446) Make IO decoding quantiles counters less contended resource.

["Slim Bouguerra (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-22446?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Slim Bouguerra updated HIVE-22446:
----------------------------------
    Status: Patch Available  (was: In Progress)

> 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
>             Fix For: 4.0.0
>
>
> 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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