Query Optimization with MySQL 5.6: Old and New Tricks - Percona Live London 2013
Query Optimization with MySQL 5.7 and MariaDB 10: Even newer tricks
MySQL Fabric: High Availability Solution for Connector/Python
Teaser For the Percona Live London 2014 Tutorial: "Query Optimization with MySQL 5.7 and MariaDB 10: even newer tricks" by DBAHire.com
Query optimization: from 0 to 10 (and up to 5.7)
MySQL at Wikipedia: How we do relational data at the Wikimedia Foundation
MySQL Schema Design in Practice
Scaling and hardware provisioning for databases (lessons learned at wikipedia)