Saturday 1 October 2016

What is main purpose of CHECKPOINT?

A Checkpoint is a database event, which synchronizes the data blocks in memory with the datafiles on disk.
A checkpoint has two purposes:
    1. to establish data consistency
    2. Enable faster database recovery

The following are the parameter that will be used by DBA to adjust time or interval of how frequently its checkpoint should occur in database.
LOG_CHECKPOINT_TIMEOUT = 3600; # Every one hour
LOG_CHECKPOINT_INTERVAL = 1000; # number of OS blocks.

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