Hi all, looking into a situation where LOB inserts are slowing down and enq tx row lock contention is up to 40% of ET. This is what we have verified so far 1- no changes in execution count. 2- no changes in xplans. 3- up to date cbo stats. 4- no ddl changes as far as object defs. - no new indexes created on affected tables. 5- chicken <-> egg dilemma. Inserts are slowing down due to row locks or row locks showing up due to inserts slowing down. Awr/addm points to an index and a lob segment being top contention segments-- //www.freelists.org/webpage/oracle-l