Percona MySQL Patches is a great presentation to see Percona Patches for MySQL in action, showing how you can use them to get more understanding of your server load and improve server performance, as well as how they can improve performance all together.
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About Peter Zaitsev
Peter managed the High Performance Group within MySQL until 2006, when he founded Percona. Peter has a Master's Degree in Computer Science and is an expert in database kernels, computer hardware, and application scaling.