Hi together, thank you very much so far - I have to do some deeper digging, but since the box is production during the week, so I have to be careful. I'll update the thread as soon as I know more. Best regards and thanks again Martin Klier Am 24.02.2014 15:04, schrieb Jonathan Lewis: > But you wouldn't see either of these strategies from the 10053 trace because > it doesn't report the histograms. -- Usn's IT Blog for Oracle and Linux http://www.usn-it.de -- //www.freelists.org/webpage/oracle-l