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https://issues.apache.org/jira/browse/HIVE-22964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17055749#comment-17055749
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Aditya Shah commented on HIVE-22964:
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Hi [~pvary],
* yes, you are correct, no need for UGI here and thus removed it.
* I used a synchronized list and removed the encompassing class for the lists.
The overhead comparison was ~ 71s (w/o synchronized lists (earlier patch)) vs
78s (with synchronized list) for 150 partitions with 2 delta directories each.
* For rename of confs, I wasn't sure how to go about deprecation. I tried to
do it the way metastore cones were handled.
Thanks!
> MM table split computation is very slow
> ---------------------------------------
>
> Key: HIVE-22964
> URL: https://issues.apache.org/jira/browse/HIVE-22964
> Project: Hive
> Issue Type: Improvement
> Reporter: Aditya Shah
> Assignee: Aditya Shah
> Priority: Major
> Attachments: HIVE-22964.1.patch, HIVE-22964.patch
>
>
> Since for MM table we process the paths prior to inputFormat.getSplits() we
> end up doing listing on the whole table at once. This could be optimized.
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