Actual link: <a href="https://www.facebook.com/notes/facebook-engineering/under-the-hood-mysql-pool-scanner-mps/10151750529723920" rel="nofollow">https://www.facebook.com/notes/facebook-engineering/under-th...</a>
Yup, it's blog spam. Go here: <a href="https://news.ycombinator.com/item?id=6597256" rel="nofollow">https://news.ycombinator.com/item?id=6597256</a>