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What indicators in the Spark UI's Storage tab should a data engineer monitor to identify suboptimal performance of a cached table when using the MEMORY_ONLY storage level?
MEMORY_ONLY
A
On Heap Memory Usage is within 75% of Off Heap Memory Usage
B
The RDD Block Name includes the “*” annotation signaling a failure to cache
C
Size on Disk is > 0
D
The number of Cached Partitions > the number of Spark Partitions
