关于 XtraDB

Percona XtraDB 是 InnoDB 存储引擎的增强版，被设计用来更好的使用更新计算机硬件系统的性能，同时还包含有一些在高性能环境下的新特性。

XtraDB 存储引擎是完全的向下兼容，在 MariaDB 中，XtraDB 存储引擎被标识为"ENGINE=InnoDB"，这个与 InnoDB 是一样的，所以你可以直接用XtraDB 替换掉 InnoDB 而不会产生任何问题。

Percona XtraDB includes all of InnoDB's robust, reliable ACID-compliant design and advanced MVCC architecture, and builds on that solid foundation with more features, more tunability, more metrics, and more scalability. In particular, it is designed to scale better on many cores, to use memory more efficiently, and to be more convenient and useful. The new features are especially designed to alleviate some of InnoDB's limitations. We choose features and fixes based on customer requests and on our best judgment of real-world needs as a high-performance consulting company.

Percona XtraDB versions in various releases are:

• XtraDB from Percona Server 5.5.33-rel31.1 in MariaDB 5.5.33
• XtraDB from Percona Server-5.5.32-rel31.0 in MariaDB 5.5.32

• MariaDB 5.2 and 5.3 include the latest XtraDB version from MariaDB 5.1 at the time they were released.

• version 5.1.59-13 in MariaDB 5.1.60
• version 5.1.54-12.5 in MariaDB 5.1.55
• version 5.1.52-11.6 in MariaDB 5.2.4 and 5.1.53
• version 5.1.49-12 in MariaDB 5.1.50
• version 5.1.47-11.2 in MariaDB 5.1.49
• version 1.0.6-10 in MariaDB 5.1.47
• version 1.0.6-9 in MariaDB 5.1.42, 5.1.44, and 5.1.44b.
• version 1.0.4-8 in MariaDB 5.1.41 RC
• version 1.0.3-8 in MariaDB 5.1.39 Beta
• version 1.0.3-6 in MariaDB 5.1.38 Beta

More information can be found on the Percona XtraDB wiki.