[GENERAL] pg_dumping large objects

[Morris Goldstein]

pg_dump --help says:

    -b, --blobs     include large objects in dump

What is the definition of "large object"? Is it a certain set of types
(e.g. text)? Long values stored in these types? What qualifies as
long? In general, how can I tell if I need the -b flag (postgres 7.4).

Morris Goldstein