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ORA-01555 snapshot too old Comment on this Topic ORA-01555 snapshot too old: rollback segment number string with name "string" too small Cause: Rollback records needed by a reader for consistent read are overwritten by other writers. Action: If in Automatic Undo Management mode, increase the setting of UNDO_RETENTION. Otherwise, use larger rollback segments. Comment on ORA-01555 snapshot too old |
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