https://marco.org/2007/08/29/if-you-are-dissatisfied-with-database-write
If you are dissatisfied with database write performance, you might try setting the innodb_flush_method parameter to O_DSYNC. Although O_DSYNC seems to be slower on most systems, yours might not be one of them.
— MySQL manual on InnoDB tuning - That’s encouraging. Thanks a lot.