Thanks Bill for this recommendation:
> *) In the early step dump the data only with pg_dumpall --disable-triggers -a Dumb question. Will this kind of pg_dumpall lead to downtime, I mean is there a database lock during this time? Thanks! -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
