We have ORACLE 10gr2 on Redhat server. Our application vendor told me don't "online rebuild index". They suggest kick out all users then rebuild index. I have been online rebuild index on several databases since ORACLE 8.1.7 and NO problem. I don't know why application vendor suggest don't "online rebuild index". I like listen your experience. Thanks. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- //www.freelists.org/webpage/oracle-l