free Oracle DBMS CPU and OLTP stress tests - details and download URLs
can be found at:

http://www.linxcel.co.uk/orabm/orabm.html
http://www.linxcel.co.uk/orabm/orabm.pdf

Free downloadable tools designed to run out-of-the box and deliver
results quickly, to provide a stake in the ground for the performance
of a server running two different types of Oracle DBMS workload: CPU
intensive, and mixed-workload Online Transaction Processing (OLTP):

• Orabmload: loads TPC-C compliant data into a user-chosen number of
Warehouses
• Orabm: stresses the CPU and memory of an Oracle DBMS server
• Orabmoltp: stresses the DBMS with a multi-session, multi-instance
OLTP load

Ready built executables for Windows are provided in all cases: all you
need is a low end PC with Oracle9i client installed, and one or more
Oracle databases (any 8i or 9i server platform) accessible by Oracle
Net to get started.

brought to you by Linxcel - the creators of empower!, the Oracle RAC
desktop tuning tool:
http://www.linxcel.co.uk/empower/software/2.1/empower!.msi