> I recently upgraded from MySQL 5.0 to Percona Server 5.1. I use yum
> remove to remove the old mysql server and client. And I used yum
> install to install Percona server & client. It was running fine for a
> while. Then something strange happened. I was in the middle of the
> mysql prompt, all of a sudden I got the message that mysqld has been
> disconnected.

> I logged out of mysql, then relogged in. To my surprise the mysqld has
> been reverted back to MySQL 5.0, the version before the upgrade. How
> did that happen?

> So I once again removed mysql server & client. And installed Percona
> server & client again. After the server was started up, "show global
> status;" showed this:

> | have_innodb                             | NO

> Innodb has been disabled. What has happened? What should I do? What
> can I do to prevent this (the disappearing Percona Server and the
> disabled InnoDB) from happening again?

> Thank you.

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