Percona Server is an enhanced drop-in replacement for MySQL. Persona server is free open source solution, offering better performance, scalability, features, and instrumentation. Self-tuning algorithms and support for extremely high-performance hardware make it the clear choice for organizations that demand excellent performance and reliability from their MySQL database server.
You can upgrade from MySql server and still use the same tools and application without any change, including phpMyAdmin. If you currently have a running MySql server please make backups of the configuration and databases before upgrading.
1. Remove MySql Server
apt-get remove mysql-server-core-5.1 mysql-server-5.1 mysql-server
2. Install the keys for Percona apt repository
gpg --keyserver hkp://keys.gnupg.net --recv-keys 1C4CBDCDCD2EFD2A
gpg -a --export CD2EFD2A | apt-key add -
3. Insert Percona apt repository to sources.list
echo "deb http://repo.percona.com/apt squeeze main" >> /etc/apt/sources.list
echo "deb-src http://repo.percona.com/apt squeeze main" >> /etc/apt/sources.list
4. Update apt
5. Install Percona server
apt-get install percona-server-5.5
> When prompted select you root password
> Confirm root password
Percona Server is now up and running and has replaced MySql Server.