ORA-01555 snapshot too old
“快照太旧”错误是因为没有足够的还原数据来实现读取一致性。
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 undo_retention setting. Otherwise, use larger rollback segments
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/30031456/viewspace-1358791/ ，如需转载，请注明出处，否则将追究法律责任。
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