Mariel Cherkassky <mariel.cherkas...@gmail.com> writes: > The system catalogs located in the global directory but the global > directory isnt so big(500K).
You're operating under false assumptions. Only catalogs marked relisshared are in that directory, other ones are in the per-database directories. Somebody mentioned pg_largeobject upthread --- that would definitely be a candidate to be big, if you're using large objects at all. regards, tom lane