As a result of an enhancement request (Bug 10215520), from 11.2.0.3 onwards you can use the following method to keep the underscore (hidden) parameters after an upgrade:
% dbua -keepHiddenParams
Reference:
Doc ID 1321814.1
As a result of an enhancement request (Bug 10215520), from 11.2.0.3 onwards you can use the following method to keep the underscore (hidden) parameters after an upgrade:
% dbua -keepHiddenParams