I haven't tried 10053 with RBO, but oraus.msg does indicate that is traces the CBO. (The end of Dennis' post indicates RBO) On 9/8/05, Mladen Gogala <gogala@xxxxxxxxxxxxx> wrote: > Can you enable the event 10053 for the whole remote database and see what > happens? > The other solution would be to select it several times and, in the meantime, > enable > 10053 on the remote database. There will be a session facilitating your query > on > the remote database. > -- > Mladen Gogala > http://www.mgogala.com > > > -- -- //www.freelists.org/webpage/oracle-l