I was wondering whether setting synchronous_commit = off will have the following side effect. (1) Process A issues UPDATE command on row x, from false to true. (2) After that, Process B READ from row x. Is it possible that when Process B start to read row x, the "true" value is not being "flushed" to the table. Hence, process B will read the row x as false? If this situation will happen, is it possible that Process B may issues a command, use to "flush all" pending data to be written to disk? Thanks and Regards Yan Cheng CHEOK -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general