When a checkpoint occurs, Oracle must update the headers of all datafiles to record
the details of the checkpoint. This is done by the CKPT process. The CKPT process
does not write blocks to disk; DBWn always performs that work.
The statistic DBWR checkpoints displayed by the System_Statistics monitor in
Enterprise Manager indicates the number of checkpoint requests completed.
检查点进程
当检查点发生时 , Oracle将更新所有数据文件的头来记录检查点 .
后面这句话什么意思 ? 哪位大侠告诉我一下 , 谢谢.
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转载于:http://blog.itpub.net/10599713/viewspace-979926/
本文详细解释了Oracle数据库中检查点(checkpoint)的工作原理。在检查点发生时,Oracle通过CKPT进程更新所有数据文件的头部信息以记录检查点详情。DBWR检查点统计信息反映了已完成的检查点请求的数量。
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