The upper limit for the desired InnoDB checkpoint age, that is, InnoDB
will flush aggressively if this value is approached, in order to avoid
exceeding it. If innodb_checkpoint_age_target system variable is not
set, then it's equal to the maximum async checkpoint age target, which
is maintained internally by the server. If the system variable is set,
then this status variable is the lesser of that target and the system
variable value.
Innodb_ checkpoint_ target_ age
The upper limit for the desired InnoDB checkpoint age, that is, InnoDB checkpoint_ age_target system variable is not
will flush aggressively if this value is approached, in order to avoid
exceeding it. If innodb_
set, then it's equal to the maximum async checkpoint age target, which
is maintained internally by the server. If the system variable is set,
then this status variable is the lesser of that target and the system
variable value.