Which version of MySQL is production-ready (GA)?
Currently, both MySQL 5.0 and MySQL 5.1 are supported for production use. MySQL 5.0 achieved General Availability (GA) status with MySQL 5.0.15, which was released for production use on 19 October 2005. MySQL 5.1 achieved General Availability (GA) status with MySQL 5.1.30, which was released for production use on 14 November 2008. Development work on MySQL 5.4 has started; currently, MySQL 5.4 is in beta status. Development work on MySQL 6.0 has started; currently, MySQL 6.0 is in alpha status.