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From "Jimmy Xiang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-9574) Lazy computing in HiveBaseFunctionResultList may hurt performance [Spark Branch]
Date Tue, 10 Feb 2015 19:23:11 GMT

    [ https://issues.apache.org/jira/browse/HIVE-9574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14314722#comment-14314722
] 

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

Test index_auto_mult_tables is ok for me on my box.

> 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, HIVE-9574.2-spark.patch, HIVE-9574.3-spark.patch,
HIVE-9574.4-spark.patch, HIVE-9574.5-spark.patch, HIVE-9574.6-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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