One of the key design features of the Exalytics In-Memory Machine
[http://www.oracle.com/uk/solutions/ent-performance-bi/business-intelligence/exalytics-bi-machine/overview/index.html]
is the use of aggregates (pre-calculated summary data), held in the TimesTen
In-Memory database. Out of the box (“OotB”) these aggregates are built through
the OBIEE tool,