This is a command-line option for the
mysqld commands (arg: Required).
In 10.6 ES, 10.6 CS, 10.5 ES, 10.5 CS, 10.4 ES, 10.3 ES:
This characterizes the number of hits a hot block has to be untouched until it is considered aged enough to be downgraded to a warm block. This specifies the percentage ratio of that number of hits to the total number of blocks in the page cache.
In 10.4 CS, 10.3 CS, 10.2 ES, 10.2 CS: