Hm, i think also that it's very strange. In your trace: kkoqbc: optimizing query block INS$1 (#0) And in my: kkoqbc: optimizing query block SEL$1 (#0) Is the "@source.afrsldb1" real dblink? Or may be it is the loopback link? And did you try this: insert into misha01 (a,b) with t_remote as (select/*+ inline no_merge */ substr(b,1,2) c from misha01@sourceDb.server1) select misha_seq.nextval, c from t_remote On Wed, Aug 14, 2013 at 10:24 PM, Michael Rosenblum <mrosenblum@xxxxxxxxxxx>wrote: > Here at Dulcian we took standardization of all environments too seriously > I dont have anything available other than 11.2.0.3, unfortunately J**** > > ** ** > > 10053 trace - see attached. IMHO, trace also looks strange.**** > > ** ** > > Thanks,**** > > Michael > > > -- Best regards, Sayan Malakshinov Senior performance tuning engineer PSBank http://orasql.org -- //www.freelists.org/webpage/oracle-l