Hi Andreas, > They will lost after a crash, but after a regular shutdown / restart all > data in the table. Yes, the semantics are clearly stated in the documentation. What I wonder is whether postgresql will issue flush/fsync operations when unlogged tables are modified? Regards, Clemens -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general