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https://issues.apache.org/jira/browse/SPARK-15247?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15284771#comment-15284771
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Apache Spark commented on SPARK-15247:
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User 'maropu' has created a pull request for this issue:
https://github.com/apache/spark/pull/13137
> sqlCtx.read.parquet yields at least n_executors * n_cores tasks
> ---------------------------------------------------------------
>
> Key: SPARK-15247
> URL: https://issues.apache.org/jira/browse/SPARK-15247
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.6.0
> Reporter: Johnny W.
>
> sqlCtx.read.parquet always yields at least n_executors * n_cores tasks, even
> though this is only 1 very small file
> This issue can increase the latency for small jobs.
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