TaskMemoryManager

MemoryConsumer

+ TaskMemoryManager

+ allocatePage- freePage+ allocateArray- freeArray

MemoryManager

+ acquireExecutionMemory- releaseExecutionMemory+ acquireStorageMemory- releaseStorageMemory

ExternalAppendOnlyMap

TaskMemoryManager

+ memoryManager

+ allocatePage

BytesToBytesMap

ShuffleExternalSorter

ExternalSorter

UnsafeExternalSorter

Spillable

+ maybeSpill