Oracle Error ORA-07305: ksmcsg: illegal database buffer size.

Oracle Error Message

ORA-07305: ksmcsg: illegal database buffer size.

Reason for the Error

The database buffer size must be a multiple of the extended cache mapping size for indirect data buffers to be used.

Solution

Verify that the db_block_size parameter is correct in INIT.ORA, or disable the use_indirect_data_buffers parameter.