Job slower after upgrade from Oracle 11.2.0.2 to 11.2.0.3

    Hallo.

I upgraded my production system from oracle 11.2.0.2 to oracle 11.2.0.3

I note that background job are slower.

For example a job ZJOB from 100000 sec. to 14000 sec. after the upgrade.

What could I check?

Statistics are updated.

Thanks for your help.

Mario