Mark J. Bobak
Senior Oracle Architect
ProQuest Information & Learning
"There are 10 types of people in the world: Those who understand binary, and those who don't."
Online rebuilds don't use existing index for creating new. They do full table scan on the table.However, in both cases, old index segment is kept until new one is ready to use and switch to it is done. Also the journal IOTs used for online rebuilds are stored in the target tablespace, so if you've got lots of transactions going on while you are rebuilding the index onl ine, you need additional space in target tablespace.Tanel.