Once you have installed HiRDB Accelerator, you can use in-memory data processing to accelerate batch-processing speed. In-memory data processing loads all of the data in RDAREAs into memory in a batch operation. During batch processing, only the data in memory is updated; the data on the disk is not updated. Upon completion of batch processing, the updated data in memory is written onto the disk in a batch operation. Since no disk input or output occurs during batch processing, the time taken for batch processing is shortened accordingly. For details about in-memory data processing, see 6.8.2 In-memory data processing.