Percona

Percona provides consulting, 24×7 support, training, and services for MySQL databases and their surrounding technologies. Percona's founders were the original leaders of the high performance support team inside of MySQL Inc. They authored the standard reference text on MySQL optimization – “High Performance MySQL” by O'Reilly Press. Percona's consultants have solved stubborn MySQL problems for a gamut of customers, including many of the world's best known web sites. Percona also builds open source tools, including an enhanced version of MySQL, to solve real world problems common to MySQL users. Percona has pioneered alternatives to expensive annual support contracts or lengthy consulting visits – we do most work remotely over the internet, bill you only for the length of time actually worked, and are available on demand with no up-front commitment.

Website: http://www.percona.com/