Popular open source database.

MySQL offers several key advantages:

Reliability and Performance. MySQL AB provides early versions of all its database server software to the community to allow for several months of "battle testing" by the open source community before it deems them ready for production use.

Ease of Use and Deployment. MySQL's architecture makes it extremely fast and easy to customize. Its unique multi-storage engine architecture gives corporate customers the flexibility they need with a database management system unmatched in speed, compactness, stability, and ease of deployment.

Freedom from Platform Lock-in. By providing ready access to source code, MySQL's approach ensures freedom, thereby preventing lock-in to a single company or platform.

Cross-Platform Support. MySQL is available on more than twenty different platforms including major Linux distributions, Mac OS X, UNIX and Microsoft Windows.

Millions of Trained and Certified Developers. MySQL is the world's most popular open source database, so it's easy to find high-quality, skilled staff.

What's New:

MySQL 5.5.19 is a new version of the 5.5 production release of the world's most popular open source database. MySQL 5.5.19 is recommended for use on production systems.

MySQL 5.5 includes several high-impact enhancements to improve the performance and scalability of the MySQL Database, taking advantage of the latest multi-CPU and multi-core hardware and operating systems. In addition, with release 5.5, InnoDB is now the default storage engine for the MySQL Database, delivering ACID transactions, referential integrity and crash recovery by default.

MySQL 5.5 also provides a number of additional enhancements including:

• Significantly improved performance on Windows, with various Windows specific features and improvements
• Higher availability, with new semi-synchronous replication and Replication Heart Beat
• Improved usability, with Improved index and table partitioning, SIGNAL/RESIGNAL support and enhanced diagnostics, including a new Performance Schema monitoring capability.

For a more complete look at what's new in MySQL 5.5, please see the following resources:

• MySQL 5.5 is GA, Interview with Tomas Ulin:
  • http://dev.mysql.com/tech-resources/interviews/thomas-ulin-mysql-55.html
• Documentation:
  • http://dev.mysql.com/doc/refman/5.5/en/mysql-nutshell.html
• Whitepaper: What's New in MySQL 5.5:
  • http://dev.mysql.com/why-mysql/white-papers/mysql-wp-whatsnew-mysql-55.php

If you are running a MySQL production level system, we would like to direct your attention to MySQL Enterprise Edition, which includes the most comprehensive set of MySQL production, backup, monitoring, modeling, development, and administration tools so businesses can achieve the highest levels of MySQL performance, security and uptime.

http://mysql.com/products/enterprise/

For information on installing MySQL 5.5.19 on new servers, please see the MySQL installation documentation at: http://dev.mysql.com/doc/refman/5.5/en/installing.html

For upgrading from previous MySQL releases, please see the important upgrade considerations at: http://dev.mysql.com/doc/refman/5.5/en/upgrading.html

MySQL Database 5.5.19 is available in source and binary form for a number of platforms from our download pages at: http://dev.mysql.com/downloads/mysql/