HI Li, thanks I know that, I RTFM, It is an open question about how to get the _disable_logging effect without using that parameter. What I'm asking is about applying no logging to all tablespaces before import? Compared to setting _disable_logging? I don't know if some one knows about improvements. For example "setting nologgin to all tablespace I saved 1% of time, but I set this other parameter too, etc.." And any other comment about reducing logging activity without using the _disable_logging parameter. :) -- //www.freelists.org/webpage/oracle-l