当使用DPF时，被分区的是数据库，而不是实例。
It is the database and not the instance that is partitioned when using DPF.
如果网络分区在预测的指定时间后发生，那么被分区的组群就不能接收到一些重要信息。
If partition time is predicted behind time, nodes in partitioned group cannot receive some important messages.
如果所有分区都处于他们都在发送和接收数据的 combo 状态，那么统计信息就不能被收集。
If all partitions are in a combo state where they are both sending and receiving data, then statistics cannot be collected.
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