Percona Toolkits is a suite of tools for MySQL and MariaDB. They are very useful in many situations and well documented (the main website is http://www.percona.com/software/percona-toolkit). To install them, you can add the repository:
> aptitude install python-software-properties > apt-key adv --keyserver keys.gnupg.net --recv-keys 1C4CBDCDCD2EFD2A > add-apt-repository 'deb http://repo.percona.com/apt wheezy main'
Then, configure APT-Pining to avoid the Percona repository overriding MariaDB's repository and conflict some packages. So, create this file at
/etc/apt/preferences.d/00percona.pref and add the following content to it:
Package: * Pin: release o=Percona Development Team Pin-Priority: 100
You're now ready for the installation ...