Sebastian Sippl writes: > I recognized that if more than one (big)query is started on the server > at the same time (by multiple users) it tends to get extremly slow. Is > there any way to avoid this ? Maybe a problem with your database adapter. There are some that allow other threads to proceed (e.g. mxZODBCDA) and some that do not (e.g. ZODBCDA). Dieter