Oracle Database Error Code ORA-383 Description :
DEFAULT cache for blocksize string cannot be reduced to zero
Error Cause:
User attempted to reduce db_cache_size to zero, or attempted to to reduce db_K_cache_size to zero while there were still online tablespaces with blocksize K. Note that since the SYSTEM tablespace cannot be taken offline, it is always illegal to set db_cache_size to zero.
How to Solve :
Offline any tablespaces with the corresponding blocksize and then perform the operation again.
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