Thanks. We have confirmed it is some type of LOB index corruption. Insert to BLOB stored inline works fine. Insert to BLOB stored out of line (one row, 5MB blob) takes 4 minutes Insert to BLOB stored out of line (new copy of table) takes 0.125 seconds. We are now rebuilding table. Thanks to everyone for their help. Keith > There is known bug on certain version when lots of rows deleted, insert took > ling time either waiting for hw enqueue or lots of time searching lob index to > find right place to insert... > > Sent via BlackBerry by AT&T > -- //www.freelists.org/webpage/oracle-l