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.
