Question: What does
the hidden parameter _smu_debug_mode do? How do I use
_smu_debug_mode do debug a corrupted data file? Can
you show an example of using _smu_debug_mode?
Answer: The _smu_debug_mode is
used to set other parameter values and it should only be
used when working directly with Oracle technical support.
you find an error like this one below,
Illegal rollback Segment operation in Automatic Undo mode
need to follow these steps:
session set "_smu_debug_mode" = 4;
you got this another error below
ORA-06510: PL/SQL: unhandled
ORA-06512: at "sys.dbms_transaction",
ORA-06512: at line 1
--then you need to follow these
rollback force '7.12.102';
system set "_smu_debug_mode" = 4;
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