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 reduce DB_nK_CACHE_SIZE to zero while there were still online tablespaces with block size nK. 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 block size and then perform the operation again.

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