From: Bossart, Nathan <bossartn(at)amazon(dot)com>
> It may be useful for backups taken with the "consistent snapshot"
> approach. As noted in the documentation [0], running CHECKPOINT
> before taking the snapshot can reduce recovery time. However, users
> might wish to avoid the IO spike caused by an immediate checkpoint.
>
> [0] https://www.postgresql.org/docs/devel/backup-file.html
Ah, understood. I agree that the slow or spread manual checkpoint is good to have.
Regards
Takayuki Tsunakawa