Jurijs >BTW: If some body have got results of that kind of testing, please do >not hesitate to share them with the list ;)))) A coworker did similar tests. You find the results, in German, here http://www.trivadis.com/Images/table_compression_tcm16-7201.pdf. The paper, unfortunately only partially, has been translated in English as well, see http://www.trivadis.com/Images/table_compression_0404en_tcm17-12678.pdf. HTH Chris -- //www.freelists.org/webpage/oracle-l