I believe that it's just a confirmation that automatic undo management was able to initialize use of the tablespace identified by the UNDO_TABLESPACE initialization parameter. On 6/20/05, Jeffrey Beckstrom <JBECKSTROM@xxxxxxxxx> wrote: > > What does this mean in the alert log? > > Successfully onlined Undo Tablespace 406. > -- Paul Baumgartel paul.baumgartel@xxxxxxxxxxxx -- //www.freelists.org/webpage/oracle-l