Taming MySQL is… challenging. Especially in very large, fast-growth, ‘always-on’ environments. It’s one of those things where you seemingly can never know all there is to know about it. That’s why I really like coming across posts like this one from FreshBooks that describes a very real problem that was affecting their users, how they dealt with it, why *that* failed, and what the final fix was. Post a link to your favorite MySQL Problem and Solution post in the comments (oh yeah, and “subscribe to comments” should be working now!)