謝意
http://qiita.com/zakki/items/f065c79bbe287481c292
http://blog.risouf.net/entry/27
https://hiroakis.com/blog/2013/08/22/mysql-%E3%81%AA%E3%81%9Cibdata1%E3%81%8C%E8%82%A5%E5%A4%A7%E5%8C%96%E3%81%99%E3%82%8B%E7%90%86%E7%94%B1%E8%A8%98%E4%BA%8B%E3%81%AE%E6%84%8F%E8%A8%B3/
参考にさせていただきました

# service mysql stop
# yum remove mysql*
# yum install http://dev.mysql.com/get/mysql-community-release-el6-5.noarc
h.rpm
# yum install mysql mysql-devel mysql-server mysql-utilities php-mysql
# chkconfig mysqld on
# rm -y /var/lib/mysql/ib*
# service mysqld start