You can specify sizing information, also called volumetrics,
for tables and columns in a physical data model, or for entities and
attributes in a logical data model.
Volumetrics properties in a data model estimate the data stored
and its expected rate of growth. This information can help an organization
make decisions about necessary equipment and database storage design.
Overview of estimating database size
You can use the workbench to complete several important
tasks that help you estimate database size requirements.