Estante Virtual has created a revolution in Brazil's second-hand book market. The site is a trading portal for thousands of independent traders and bookstores, with a searchable inventory that grows enough to fill two bookstores every day. But as the site grew, the traffic exceeded the capabilities of the MySQL database and the web servers. Percona converted the site to a higher performance architecture using technologies such as Sphinx and lighttpd, and performed full-stack system optimization. The result is an excellent user experience for buyers and sellers, and a high-performance application that can scale significantly with future demand.