yum安装软件时报错libmysqlclient.so.18()(64bit)

环境：CentOS 7.2，使用网易yum的网络源
问题：
使用yum安装软件时报错
...
2:postfix-2.10.1-6.el7.x86_64 has missing requires of libmysqlclient.so.18()(64bit)
2:postfix-2.10.1-6.el7.x86_64 has missing requires of libmysqlclient.so.18(libmysqlclient_18)(64bit)
重点关注：libmysqlclient.so.18()(64bit)
解决:
缺少Percona-XtraDB-Cluster-shared-55-5.5.37-25.10.756.el6.x86_64.rpm这个包

# wget http://www.percona.com/redir/downloads/Percona-XtraDB-Cluster/5.5.37-25.10/RPM/rhel6/x86_64/Percona-XtraDB-Cluster-shared-55-5.5.37-25.10.756.el6.x86_64.rpm
# rpm -ivh Percona-XtraDB-Cluster-shared-55-5.5.37-25.10.756.el6.x86_64.rpm