public interface IBTreeUtilizationReport
Note: The utilization numbers reported by this interface are a bit misleading. They only consider the #of index positions in the node or leaf which is full, but do not take into account the manner in which the persistence store allocates space to the node or leaf. For example, for the WORM we do perfect allocations but retain many versions. For the RWStore, we do best-fit allocations but recycle old versions. The space efficiency of the persistence store is typically the main driver, not the utilization rate as reported here.
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