To determine the split threshold

[xuxc]

as we know ,Hbase split threshold is determine by IncreasingToUpperBoundRegionSplitPolicy,and it just affected by tableRegionsCount and flushSize.
I'd want to know if there is a more comprehensive evaluation that includes 1) the percent of datanode's memory usage,2)datanode's I/O load rate and other parameters of datanode to determine split threshold.
thank u.
xuxc