No I did NOT post the following comment
This is ridiculous. You didn’t test MySQL, you tested a failing DNS lookup on authentication.

resulting in the follow up post :

My previous post Redis, Memcache, Tokyp Tyrant, MySQL comparison had a flaw as pointed out by this comment. The MySQL was taking a huge time for doing a reverse DNS lookup.\

But as always … Everything is just a Freaking dns problem :)