Setting Up Percona-mysql-server

Percona apt Repository is not included in Base Ubuntu. So need to install it

sudo gpg --keyserver  hkp://keys.gnupg.net --recv-keys 1C4CBDCDCD2EFD2A
sudo gpg -a --export CD2EFD2A | sudo apt-key add -

Add this to /etc/apt/sources.list, replacing VERSION with the name of your distribution:

deb http://repo.percona.com/apt precise main
deb-src http://repo.percona.com/apt precise main
apt-get update
apt-get install percona-server-server-5.5 percona-server-client-5.5

Ref:http://www.percona.com/doc/percona-server/5.5/installation/apt_repo.html
Ref:http://www.percona.com/doc/percona-server/5.5/installation.html

We can generate initial mysql configuration file (my.cnf) through the following link
https://tools.percona.com/wizard