Hi > Qs Does conversion of freelist groups to 4 needs to be done ONLY for > Tables & Indexes which undergo INSERTs & NOT for Tables / Indexes > which undergo UPDATEs, SELECTs, DELETEs? To answer your question... Free lists could be used by UPDATE and DELETE statements as well. - When an UPDATE statement generates migrated and/or chained rows. - When a DELETE statement frees enough space to put the block on a free list. That said, the former should be avoided anyway and the later is not that usual... Therefore, usually, the INSERT statements are the most important factor to consider. In any case SELECT statements don't access the free lists. HTH Chris -- //www.freelists.org/webpage/oracle-l