Hi Patty, How many LIOs per one insert do you have? How many indexes do you have on the table? Hope no functional indexes :) Simple algorithm for LIO for simple insert should be = N*M + X where N = number of indexes M = depth level (usually up to 4 on big tables) X = number of blocks the insert can fit into (1 for normal size row) Is your number bigger then with this simple formula? Regards, Zoran Martic --- Patty.Charlebois@xxxxxxxxxxxxxx wrote: > The only constraint on this table is a primary key > constraint to ensure=20= > uniqueness=2E > __________________________________ Do you Yahoo!? The all-new My Yahoo! - Get yours free! http://my.yahoo.com -- //www.freelists.org/webpage/oracle-l