can change the perm of DBC? - response (3) by sk73

We cannot change the perm of DBC.
Modify the sizes from the databases under DBC that are of no importance as per your judgement. (or)
Keep using GIVE, MODIFY DATABASE and UPDATE SPACE while checking the sizes in DBC.DATABASES. When you are at the immediate child level under DBC, you will notice that the DBC size is brought back. This can be done only on some databases.