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As described in the previous chapter, when the redo log is recorded during the transaction processing, the checkpoint step for the persistence of the memory DB, and the disk I/O for transaction processing of the disk DB are configured on the same disk, a disk bottleneck occurs. It is recommended to configure the redo log and each area as a physically separated disk in order to minimize the performance downgrade.

Disk I/O

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As shown in the figure above, if the redo log record, checkpoint, and disk I/O by the buffer manager are concentrated on one disk, the disk bottleneck cannot be avoided. Therefore, it is recommended for the user to refer to this document for efficient disk configuration.