If Redo Apply is running, you must cancel Redo Apply before you can change the log files.

如果重做应用正在运行，你必须在你改变日志文件钱取消重做应用。

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You then have the option of either starting Redo apply or real-time apply, or opening the database for read-only access.

然后，你可以选择启用应用重做或者实时应用，再或者以只读方式打开数据库来访问。

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You can alternate between having a physical standby database open for read-only access and performing Redo Apply using the following procedures.

你可以使用以下过程在物理备库只读方式打开访问和执行重做应用来轮流切换。

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At some point, you need to resume redo apply on the standby database, and apply the archived redo log files to resynchronize the standby database with the primary database.

在有点伤，你需要在备库上重新应用重做数据，应用归档日志来同步备库和主库之间的数据。

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Make sure that Redo Apply is running (so that the change is applied to the standby database). If the following query returns the MRP or MRP0 process, Redo Apply is running.

确保重做应用在运行，这样备库就会应用这些变化。如果以下的查询返回的MRP或者MRP0进程，则说明重做应用在运行。

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Issue the following query to find out if the standby database is performing redo apply or real-time apply. If the MRP0 or MRP process exists, then the standby database is applying redo.

通过如下查询找出备库是在重做应用还是实时应用，如果MRP0或者MRP进程存在，那么备库正在应用重做。

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Issue the following query to find out if the standby database is performing redo apply or real-time apply. If the MRP0 or MRP process exists, then the standby database is applying redo.

通过如下查询找出备库是在重做应用还是实时应用，如果MRP0或者MRP进程存在，那么备库正在应用重做。

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