现在最新的版本是Percona Server 5.1.47 -11.2，这个版本是基于MySQL5.1.47和InnoDB plugin 1.0.8的(而Oracle已经发布了MySQL5.1.49了)。
新功能：http://www.percona.com/docs/wiki/percona-server:release_notes_51
mysql>show plugins;
+--------------------------------+--------+--------------------+---------+---------+
| Name | Status | Type | Library | License |
+--------------------------------+--------+--------------------+---------+---------+
| binlog | ACTIVE | STORAGE ENGINE | NULL | GPL |
| CSV | ACTIVE | STORAGE ENGINE | NULL | GPL |
| MEMORY | ACTIVE | STORAGE ENGINE | NULL | GPL |
| InnoDB | ACTIVE | STORAGE ENGINE | NULL | GPL |
| INNODB_RSEG | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_BUFFER_POOL_PAGES | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_BUFFER_POOL_PAGES_INDEX | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_BUFFER_POOL_PAGES_BLOB | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_TRX | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_LOCKS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_LOCK_WAITS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMP | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMP_RESET | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMPMEM | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_CMPMEM_RESET | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_TABLE_STATS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_INDEX_STATS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| XTRADB_ADMIN_COMMAND | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_TABLES | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| INNODB_SYS_INDEXES | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| XTRADB_ENHANCEMENTS | ACTIVE | INFORMATION SCHEMA | NULL | GPL |
| MyISAM | ACTIVE | STORAGE ENGINE | NULL | GPL |
| MRG_MYISAM | ACTIVE | STORAGE ENGINE | NULL | GPL |
+--------------------------------+--------+--------------------+---------+---------+
23 rows in set (0.00 sec)
mysql>select @@innodb_version;
+------------------+
| @@innodb_version |
+------------------+
| 1.0.8 -11.2 |
+------------------+
1 row in set (0.00 sec)
在该版本中，其将内建的innobase改为仅支持动态编译，而innodb_plugin则支持静态和动态两种编译方式，需要我们在编译的时候注意下,与原先的编译方式稍有不同。
=== InnoDB Storage Engine ===
Plugin Name: innobase
Description: Transactional Tables using InnoDB
Supports build: dynamic
Configurations: max, max-no-ndb
=== InnoDB Storage Engine ===
Plugin Name: innodb_plugin
Description: Transactional Tables using InnoDB
Supports build: static and dynamic
Configurations: max, max-no-ndb
而Percona之前的版本 5.1.45 -10.2和Oracle的MySQL5.1.47中内建的innobase都支持静态和动态编译，innodb_plugin则只支持动态方式。这种改变我感觉还是不错的，至少有助于提高性能。