[SPARK-21090] Optimize the unified memory manager code

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.0
• Fix Version/s: 2.2.0
• Component/s: Spark Core
• Assignee: liuxian
• Reporter: liuxian
• Created: 14/Jun/17 05:44
• Updated: 19/Jun/17 03:54
• Resolved: 19/Jun/17 03:47

Description

1.In acquireStorageMemory, when the MemoryMode is OFF_HEAP ,the maxMemory should be modified to maxOffHeapStorageMemory
2. Borrow memory from execution, numBytes modified to numBytes - storagePool.memoryFree will be more reasonable

Issue Links

• links to: [Github] Pull Request #18296 (10110346)