InnoDB has always been highly efficient, and includes several unique architectural elements to assure high performance and scalability. The latest InnoDB storage engine includes new features that take advantage of advances in operating systems and hardware platforms, such as multi-core processors and improved memory allocation systems. In addition, new configuration options let you better control some InnoDB internal subsystems to achieve the best performance with your workload.
Starting with MySQL 5.5 and InnoDB 1.1, the built-in InnoDB
storage engine within MySQL is upgraded to the full feature set
and performance of the former InnoDB Plugin. This change makes
these performance and scalability enhancements available to a much
wider audience than before, and eliminates the separate
installation step of the InnoDB Plugin. After learning about the
InnoDB performance features in this section, continue with
Optimization to learn the best practices for
overall MySQL performance, and Optimizing for
in particular for InnoDB tips and guidelines.