ORA-01555 snapshot too old: rollback segment number string with name "string" too smallCause: 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.ORA-02063 preceding stringstring from stringstringCause: An Oracle error was received from a remote database link.Action: Refer to the preceding error message(s).看下解决方法,应该可以明白点吧
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