Database Error Messages

Release
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  • 23ai
  • 21c
  • 19c
Updated
Jun 24, 2024

ORA-01627

rollback segment number 'string' is not online

Cause

Could have been taken offline before by DBA or cleaned up by SMON.


Action

Check the status of rollback segment in undo$ or dba_rollback_segs to make sure the rollback segment is actually online.