I posted a doc update a while ago to mention that CLUSTER isn't MVCC-safe:
http://archives.postgresql.org/pgsql-patches/2007-03/msg00137.phpCLUSTER is now MVCC-safe in CVS HEAD, but the documentation for older releases should still be updated.
-- Heikki Linnakangas EnterpriseDB http://www.enterprisedb.com ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings