How to keep pg_largeobject from growing endlessly

Hi all

 

I'm routinely vacuumlo'ing to reap orphan OIDs. Is it necessary to manually vacuum pg_largobject or is it handled by autovacuum?

 

In a system where large objects are constantly added (and *some* rarely deleted, so it grows every day), would I gain space (freed to the OS) by VACUUM FULL it?

 

Thanks.