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Posted to issues@hive.apache.org by "Rajesh Balamohan (JIRA)" <ji...@apache.org> on 2016/09/21 01:07:21 UTC
[jira] [Updated] (HIVE-14803) S3: Stats gathering for insert
queries can be expensive for partitioned dataset
[ https://issues.apache.org/jira/browse/HIVE-14803?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Rajesh Balamohan updated HIVE-14803:
------------------------------------
Attachment: HIVE-14803.1.patch
Observed 12% improvement in runtime with 100 partition dataset.
\cc [~ashutoshc]
> S3: Stats gathering for insert queries can be expensive for partitioned dataset
> -------------------------------------------------------------------------------
>
> Key: HIVE-14803
> URL: https://issues.apache.org/jira/browse/HIVE-14803
> Project: Hive
> Issue Type: Improvement
> Components: Metastore
> Reporter: Rajesh Balamohan
> Assignee: Rajesh Balamohan
> Priority: Minor
> Attachments: HIVE-14803.1.patch
>
>
> StatsTask's aggregateStats populates stats details for all partitions by checking the file sizes which turns out to be expensive when larger number of partitions are inserted.
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