CoordinatorExecutionMode and Process MaxThreads

Just recently I got into a processing performance test of my Analysis Services database and I noticed that only a little over 50% of the available system resources were being used. On investigation I found that the busy (processing pool busy threads), idle (processing pool idle threads) and queue (processing pool job queue length) that were to be used by the processing were way below the SSAS defaults.

This did not seen right. On closer investigation I found that, during the processing cycle, small amounts of data were being processed (ranging from a 1000 to 100000 records per batch) and ProcessAdd was being used to process the partition data.