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

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.6.0
• Component/s: Spark Core
• Target Version/s: 1.6.0
• Assignee: Josh Rosen
• Reporter: Josh Rosen
• Created: 10/Dec/15 01:28
• Updated: 12/Feb/16 18:13
• Resolved: 10/Dec/15 23:29

Description

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.

Issue Links

• links to: [Github] Pull Request #10237 (JoshRosen)