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ORA-01092: ORACLE instance terminated

Oracle Database Tips by Donald Burleson

The Oracle docs note details on the ORA-1092 error:

ORA-01092: ORACLE instance terminated. Disconnection forced
Cause: The instance connected to was terminated abnormally, probably due to a SHUTDOWN ABORT. The current process was forced to disconnect from the instance.
Action: Examine the alert log for more details. Contact the database administrator to determine when the instance is restarted. Attempt to reconnect after the instance is running again.

The ORA-01092: ORACLE instance terminated Disconnection forced. is a generic error when Oracle detects a serious problem at database start time.

The ORA-01092: ORACLE instance terminated error can be caused by many factors, and I've seen there:

  • A shutdown abort

  • Bad permissions of BDUMP, CDUMP or UDUMP directories

  • Missing datafiles

  • Renaming files when Oracle is down

  • and many other OS-related causes

Check your alert log for a more descriptive report of the exact startup problem.

 

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Note: This Oracle documentation was created as a support and Oracle training reference for use by our DBA performance tuning consulting professionals.  Feel free to ask questions on our Oracle forum.

Verify experience! Anyone considering using the services of an Oracle support expert should independently investigate their credentials and experience, and not rely on advertisements and self-proclaimed expertise. All legitimate Oracle experts publish their Oracle qualifications.

Errata?  Oracle technology is changing and we strive to update our BC Oracle support information.  If you find an error or have a suggestion for improving our content, we would appreciate your feedback.  Just  e-mail:  

and include the URL for the page.


                    









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