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Oracle Checkpoint Process (CKPT) background process

At specific times, the Checkpoint Process requests a checkpoint be made by DBWn. When DBWn is finished with the checkpoint, CKPT updates the data file headers and the control file with the most recent checkpoint SCN.

CKPT also wakes up every three seconds to check if the amount of memory exceeds the value configured in the pga_aggregate_limit init parameter.

CKPT is a background process (but can also run as a thread).

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