[PostgreSQL-Hackers] synchronous commit in dump

It might help if you're dumping as individual inserts and not COPY,
but if you're doing that you're not asking for performance in the
first place. I don't really see how it would help in any other cases -
sync_commit=off helps when you have many small transactions, which
really is the opposite of pg_dump/pg_restore.

That isn't necesarily true. Maybe you don't have shell access to the
database server
but just trough pgadmin or something like that...

in that env the copy of the dumps won't work so you need to make the backup with
inserts (by need) and still want some performance

I don't see why that would preclude using COPY. But anyway in that
case you could still run the restore with -1.

...Robert