Databricks Instances - RAM Per Core Analysis

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The following formulae are used for calculations:
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jvm_heap_memory_mb = (instance.ram * 1024 * 0.97 - 4800) * 0.8;

reserved_memory_mb = 300 mb
spark_memory_fraction = 0.6
user_memory_fraction = 1-spark_memory_fraction = 0.4

spark_execution_memory_fraction = 0.5
spark_storage_memory_fraction = 1 - spark_execution_memory_fraction = 0.5