xtradb suppoort in 5.0.x version?

Hi.
I have installed latest percona for 5.0.x version
from http://www.percona.com/downloads/Percona-Server-5.0/Percona- Server-5.0.91-22/deb/hardy/x86_64/

But it seems xtradb is not there?

mysql> show variables like “%version%”;
±------------------------±-----------------------+
| Variable_name | Value |
±------------------------±-----------------------+
| protocol_version | 10 |
| version | 5.0.91-b22.hardy.5-log |
| version_comment | (Ubuntu) |
| version_compile_machine | x86_64 |
| version_compile_os | debian-linux-gnu |
±------------------------±-----------------------+
5 rows in set (0.00 sec)

mysql> SHOW ENGINES;
±-----------±---------±---------------------------------- -----------------------------+
| Engine | Support | Comment |
±-----------±---------±---------------------------------- -----------------------------+
| MyISAM | DEFAULT | Default engine as of MySQL 3.23 with great performance |
| MEMORY | YES | Hash based, stored in memory, useful for temporary tables |
| InnoDB | YES | Supports transactions, row-level locking, and foreign keys |
| BerkeleyDB | NO | Supports transactions and page-level locking |
| BLACKHOLE | YES | /dev/null storage engine (anything you write to it disappears) |
| EXAMPLE | NO | Example storage engine |
| ARCHIVE | YES | Archive storage engine |
| CSV | YES | CSV storage engine |
| ndbcluster | DISABLED | Clustered, fault-tolerant, memory-based tables |
| FEDERATED | YES | Federated MySQL storage engine |
| MRG_MYISAM | YES | Collection of identical MyISAM tables |
| ISAM | NO | Obsolete storage engine |
±-----------±---------±---------------------------------- -----------------------------+
12 rows in set (0.00 sec)

mysql> set global innodb_expand_import=1;
ERROR 1193 (HY000): Unknown system variable ‘innodb_expand_import’

What’s wrong? Please suggest…

I need 5.0.x version…

XtraDB isn’t in 5.0, it is based on the InnoDB plugin and is 5.1 and newer only. But a lot of our performance improvements were back-ported to the InnoDB in our 5.0 builds.

ok. thx for clarification.