I need to investigate the topic in the subject line; in specific, tuning the AIX kernel to optimize performance of an Oracle data warehouse. Is there a more up-to-date reference than the following, which Google found on Amazon: Oracle 8i and UNIX Performance Tuning By Ahmed Alomari. How much would still be valid in 9i? Thanks for your help, Leslie Leslie Tierstein Senior Consultant Vision Chain, Inc. The first software to power the demand data network phone: 202-261-3549 -- //www.freelists.org/webpage/oracle-l