1.4 What Is New in MySQL 5.5

1.4.1 Scalability Improvements
1.4.2 InnoDB I/O Subsystem Changes
1.4.3 Diagnostic and Monitoring Capabilities
1.4.4 Enhanced Solaris Support

This section summarizes what has been added to, deprecated in, and removed from MySQL 5.5.

Added Features

The following features have been added to MySQL 5.5:

Deprecated Features

The following features are deprecated in MySQL 5.5 and may be or will be removed in a future series. Where alternatives are shown, applications should be updated to use them.

Removed Features

The following constructs are obsolete and have been removed in MySQL 5.5. Where alternatives are shown, applications should be updated to use them.