Error Message
ORA-00383: DEFAULT cache for blocksize string cannot be reduced to zero
Cause
User attempted to reduce db_cache_size to zero, or attempted to to reduce db_[n]K_cache_size to zero while there were still online tablespaces with blocksize [n]K. Note that since the SYSTEM tablespace cannot be taken offline, it is always illegal to set db_cache_size to zero.
Action
Offline any tablespaces with the corresponding blocksize and then perform the operation again.
