What causes the size of an aggregate to increase when modeling a system?

The increase in aggregate size during system modeling occurs when too many entities or business logic are included in the aggregate, leading to:

• Complexity in state management — the aggregate becomes bulky and difficult to maintain.
• Violation of the single responsibility principle — the aggregate takes on too many functions.
• Performance issues — large aggregates require more resources during loading and saving.

Reasons for aggregate size increase:

• Including entities in the aggregate that do not necessarily need to be transactionally linked.
• Attempting to combine multiple business concepts into one aggregate.
• Lack of clear boundary delineation of aggregates.

To control the size of the aggregate, it is important to carefully define its boundaries and include only those entities that should change atomically together.