Have you considered just creating a stored outline (or sql profile if you have the tuning pack) to lock in your favorite explain plan? Why would you want to create histograms on all indexed columns? You might want to try removing all histograms on the columns involved with this query to see if that helps, or only gather histograms for columns with skewonly. I think it might be helpful if you can provide the output of "select * from table(dbms_xplan.display_cursor(3841154485,0,'IOSTATS LAST'));", if this is the query you're trying to tune, but you'll need to turn on a 10046 trace for the query in order to gather plan level stats. Regards, Brandon ________________________________ Privileged/Confidential Information may be contained in this message or attachments hereto. Please advise immediately if you or your employer do not consent to Internet email for messages of this kind. Opinions, conclusions and other information in this message that do not relate to the official business of this company shall be understood as neither given nor endorsed by it.