Can I do VACUUM FULL to pg_largeobject table?

I have two tables (table1, table2) in a Postgres 9.1 database. Both having oid type. Each table 1 million records. And pg_largeobject table size is around 40GB. I have removed 0.9 million records from each table, and executed the below command. vacuum full analyze table1; vacuum full analyze table2; Still no change in pg_largeobject table size (auto vacuum is enabled) Do I need to execute above command to pg_largeobject table too? Will it impact anything?