yes, i read that, and i read the wikipedia article.
I guess what I'm interested in is in the Batch Operations section:
--> At each iteration after actions finish execution of the current batch the database transaction is committed.
So does that mean that even though the Process has a TRANSACTION "around it", if I'm using IN BATCHES OF 1 somewhere in that process tree, then COMMITs are happening?
The 1st RULE in the above picture calls a Process shown here:

This creates an email for each of the people selected in a Grid.