alter system checkpoint

最新推荐文章于 2021-11-22 23:26:29 发布

翻译最新推荐文章于 2021-11-22 23:26:29 发布 · 2.7k 阅读

文章标签：

#system #database #transactions #oracle #application #thread

本文详细介绍了如何使用 Oracle Database 中的 CHECKPOINT 子句来显式地触发检查点操作，确保已提交事务的所有更改都被写入到磁盘上的数据文件中。文章还解释了在 Real Application Clusters 环境下，如何通过 GLOBAL 和 LOCAL 设置来控制整个集群或单个实例的日志文件组的检查点行为。

checkpoint_clause

Specify CHECKPOINT to explicitly force Oracle Database to perform a checkpoint, ensuring that all changes made by committed transactions are written to datafiles on disk . You can specify this clause only when your instance has the database open. Oracle Database does not return control to you until the checkpoint is complete.

GLOBAL In a Real Application Clusters environment, this setting causes Oracle Database to perform a checkpoint for all instances that have opened the database. This is the default.

LOCAL In a Real Application Clusters environment, this setting causes Oracle Database to perform a checkpoint only for the thread of redo log file groups for the instance from which you issue the statement.