Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/9084#discussion_r41825250
--- Diff: core/src/main/scala/org/apache/spark/memory/MemoryManager.scala
---
@@ -40,19 +41,38 @@ private[spark] abstract class MemoryManager {
_memoryStore
}
+ // Amount of execution/storage memory in use, accesses must be
synchronized on `this`
+ protected var _executionMemoryUsed: Long = 0
+ protected var _storageMemoryUsed: Long = 0
+
/**
* Set the [[MemoryStore]] used by this manager to evict cached blocks.
* This must be set after construction due to initialization ordering
constraints.
*/
- def setMemoryStore(store: MemoryStore): Unit = {
+ final def setMemoryStore(store: MemoryStore): Unit = {
_memoryStore = store
}
/**
- * Acquire N bytes of memory for execution.
+ * Total available memory for execution, in bytes.
+ */
+ def maxExecutionMemory: Long
+
+ /**
+ * Total available memory for storage, in bytes.
+ */
+ def maxStorageMemory: Long
+
+ // TODO: avoid passing evicted blocks around to simplify method
signatures (SPARK-10985)
--- End diff --
Good call on deferring this to a followup task.
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