So, I need some thoughts to bounce around here. Running 10.2 Standard edition on Win and 10.2 Enterprise edition on Linux RH 5. I have the same database, the same data. Building a Materialzed View on the Win box never requires the temporary tablespace be more than about 500mb. While on the LINUX box we are gobbling up about 175GB of space. Any idea why we might see such a vast difference? RF Robert G. Freeman Oracle Consultant/DBA/Author Principal Engineer/Team Manager The Church of Jesus Christ of Latter-Day Saints Father of Five, Husband of One, Author of various geeky computer titles from Osborne/McGraw Hill (Oracle Press) Oracle Database 11g New Features Now Available for Pre-sales on Amazon.com! BLOG: http://robertgfreeman.blogspot.com/ Sig V1.2 -- //www.freelists.org/webpage/oracle-l