Hello, > It was a bug of version 8.1. > We solve all our problem simply update to 8.4 !!! Well ... it was not a bug, actually a feature that was not yet implemented. My first question about which version of PostgreSQL you were using in this thread was exactly for that purpose, but ... you never replied to that. Next time, please post the version you are using and possibly the operating system. > It's incredible, DB don't change dimension even after 1 million insert and > update. > CPUs average load drastically is fallen down! Glad you fixed it. Ciao, Gabriele -- Gabriele Bartolini - 2ndQuadrant Italia PostgreSQL Training, Services and Support Gabriele.Bartolini@xxxxxxxxxxxxxx - www.2ndQuadrant.it http://www.2ndquadrant.com/books/ -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general