[jira] [Created] (SPARK-12251) Document Spark 1.6's off-heap memory configurations and add config validation

["Josh Rosen (JIRA)" <ji...@apache.org>]

Josh Rosen created SPARK-12251:
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             Summary: Document Spark 1.6's off-heap memory configurations and add config validation
                 Key: SPARK-12251
                 URL: https://issues.apache.org/jira/browse/SPARK-12251
             Project: Spark
          Issue Type: Improvement
          Components: Spark Core
            Reporter: Josh Rosen
            Assignee: Josh Rosen


We need to document the new off-heap memory limit configurations which were added in Spark 1.6, add simple configuration validation (for instance, you shouldn't be able to enable off-heap execution when the off-heap memory limit is zero), and alias the old and confusing `spark.unsafe.offHeap` configuration to something that lives in the `spark.memory` namespace.



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