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Posted to dev@hive.apache.org by "Jimmy Xiang (JIRA)" <ji...@apache.org> on 2015/02/06 20:02:35 UTC

[jira] [Commented] (HIVE-9574) Lazy computing in HiveBaseFunctionResultList may hurt performance [Spark Branch]

    [ https://issues.apache.org/jira/browse/HIVE-9574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14309648#comment-14309648 ] 

Jimmy Xiang commented on HIVE-9574:
-----------------------------------

Patch 1 is on RB: https://reviews.apache.org/r/30739/

> Lazy computing in HiveBaseFunctionResultList may hurt performance [Spark Branch]
> --------------------------------------------------------------------------------
>
>                 Key: HIVE-9574
>                 URL: https://issues.apache.org/jira/browse/HIVE-9574
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Spark
>            Reporter: Rui Li
>            Assignee: Jimmy Xiang
>             Fix For: spark-branch
>
>         Attachments: HIVE-9574.1-spark.patch
>
>
> {{RowContainer.first}} may call {{InputFormat.getSplits}}, which is expensive. If we switch {{container}} and {{backupContainer}} frequently in {{HiveKVResultCache}}, it will downgrade performance.



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