Causes of Downtime in Production MySQL Servers

Everyone wants to prevent database downtime by being proactive, but are
measures such as inspecting logs and analyzing SQL really proactive? Although
these are worthwhile, they almost always identify problems that already exist.
To be truly proactive, one must prevent problems, which requires studying and
understanding the reasons for downtime. This white paper is the companion to
our earlier paper on preventing production emergencies in MySQL.