Percona Toolkit is a collection of advanced command-line tools used by Percona
support staff to perform a variety of MySQL and system tasks that are too
difficult or complex to perform manually, including:

    Verify master and replica data consistency
    Efficiently archive rows
    Find duplicate indexes
    Summarize MySQL servers
    Analyze queries from logs and tcpdump
    Collect vital system information when problems occur

WWW: http://www.percona.com/software/percona-toolkit/