docs: private long getSize() {
  		long numSegments = 0;
  		numSegments += this.availableMemory.size();
  		numSegments += this.buckets.length;
  		for(InMemoryPartition<T> p : this.partitions) {
  			numSegments += p.getBlockCount();
  			numSegments += p.numOverflowSegments;
  		}
  		numSegments += this.compactionMemory.getBlockCount();
  		return numSegments*this.segmentSize;
  	}