We are proud to present the MySQL Server 5.5.8 GA release, the first 5.5 production version of the world’s most popular open source database. MySQL 5.5.8 is recommended for use on production systems.
MySQL 5.5 includes several high-impact changes to address scalability and performance issues in MySQL Server. These changes exploit advances in hardware and CPU design and enable better utilization of existing hardware. MySQL 5.5 also provides a number of other new enhancements, including InnoDB I/O subsystem changes, enhanced Solaris Support as well as diagnostic and monitoring capabilities.