汹涌澎湃汹涌澎湃汹涌澎湃汹涌澎湃 化参数的值，可以为每个实例启动更多ARCn进程，启动的ARCn进程的最大数量是10个。 CKPT 检查点(checkpoint process，CKPT)进程有助于减少恢复实例的用时。执行检查点期间，CKPT更新控制文件和数据文件的头，以便反映最后的成功
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Background checkpoint process suspended until locks are available.
后台检查点进程已挂起，直到有可用的锁。
The backup or shadow server is a continuous checkpoint of the active server, which is implemented through two primary changes to the traditional process of live migration.
备用或影子服务器是活动服务器的一个连续检查点，它通过对传统动态迁移过程进行两处主要改动来实现。
If an error occurs after a checkpoint, the loading process can be restarted from the rows following the checkpoint.
如果在检查点后出现了任何错误，则可以从检查点后的行重新启动加载流程。
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