Philip Crotwell <crotwell(at)seis(dot)sc(dot)edu> writes:
> I poked around in the database directory and found a file named 16948 that
> is 960Mb or almost all of the space on my partition.
That is pg_largeobject. Vacuuming should recover the lost space; are
you sure you've vacuumed it?
regards, tom lane