如果数据库运行在归档模式下，那么你可以在数据库开启的状态下备份数据库。这种备份叫做不一致备份。

ARCHIVELOG mode, then you can back up the database while it is open. The backup is called an.

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启用事务日志归档模式的一个副作用是：在下面两种情况下，所有数据更改(insert)都会被记录到日志中，而默认情况下它们不会被记录。

One side effect of enabling the transaction log archive mode is all the data changes (inserts) get logged, whereas by default they are not logged in the following two cases.

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在上述情况下，如果性能很重要的话，最好是在执行上述操作时禁用事务日志归档模式。

If performance is important in the above cases, it would be a good idea to disable transaction log archive mode for the duration of their execution.

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