>>>A 4-node RAC BIG benchmark with Oracle 10g / AIX 5.3L using a Hybrid Banking App. is underway. uh, have you measured at 1,2 and 4 nodes ? also, when did the definition of "Large" start to include disk layouts of 16 spindles RAID 1+0 for the database and 1 additional LUN for redo? Not that you have a disk I/O problem anyway... -- //www.freelists.org/webpage/oracle-l