在检查点过程中，数据库服务器会在消息日志中写一条检查点完成消息。

As part of the checkpoint procedure, the database server writes a checkpoint-complete message in the message log.

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清单5展示了转换为ER服务器的HDR辅助服务器的消息日志节选。

Listing 5 shows an excerpt from the message log of the HDR secondary server that is transformed as er server.

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