Bernard, > Never heard of RACman ? No. Google shows RACman as an alias for a regular poster at CDOS. tahiti.oracle.com yields no hits. Neither does metalink. Can RACman reduce the amount of redo in a way that two instances produce less redo than one instance? I'm curious and willing to learn. Regards, Carel-Jan === If you think education is expensive, try ignorance. (Derek Bok) === -- //www.freelists.org/webpage/oracle-l