When did the redo log under InnoDB in mysql start to perform check point disk dropping?

The third hot summer of open source is coming , College students participate in winning 10000 yuan bonus ！>>>

mysql in innodb Under the redo log When to start execution check point Drop plate ？ It's a few redo log Only when it is full can it be executed check point Discs , There is still one redo log When it is full, it will be executed , Or has it been implemented and redo log It doesn't matter if you are dissatisfied ？

---