Database Growth on upgrade to EHP4

Dear Basis Consultants

Hi! We have applied EHP4 on an existing EHP3 ABAP system. After the upgrade, we had noticed a significant change in the database size.

EHP3 - Source - Size :180 GB

EHP4 - Target - Size : 250 GB

The database is Oracle 10.2.0.4. for ECC 6.0 Unicode System.

To what parameters/factors do we account this database growth? Request your help...

Thanks & Regards

Sai