Indeed, it also calls them "slots": > You can get higher concurrency by keeping more than one row and updating a random row... just choose a random slot and up

Indeed, it also calls them "slots": > You can get higher concurrency by keeping more than one row and updating a random row... just choose a random slot and update it https://www.oreilly.com/library/view/high-performance-mysql/9781449332471/ch04.html#counter_tables https://www.oreilly.com/library/view/high-performance-mysql/...