On Mon, Nov 24, 2008 at 03:47:27PM +0100, Justine Demeyer wrote: > I indexed a set of 200 000 data who has a global size of about 1Gb and the > index created has a size of more than 3Gb!! What can explain this > difference??? I've added a new FAQ entry about database size: http://trac.xapian.org/wiki/FAQ/DatabaseSize Hope that helps. Cheers, Olly