Can anyone point to or give an explanation of what this AWR report statistic means and/or where it comes from please? We just moved an OLTP database from 11.1 to 11.2 and my numbers in that statistic have decreased dramatically ( down to 1 MB per second ). Parses per second also dropped dramatically. The change in the database server ( 11.2.0.3.4 from 11.1.0.7.12 ) also has additional memory in the SGA and PGA. This change was made in conjunction with an application server upgrade ( went from 10.2.0.4 client to 11.2.0.3 client ). The changes are all extremely positive just trying to sort out why so much better! -- //www.freelists.org/webpage/oracle-l