第一步

yum install libevent

第二步

wget http://dag.wieers.com/rpm/packages/rpmforge-release/rpmforge-release-0.3.6-1.el5.rf.i386.rpm
rpm -ivh rpmforge-release-0.3.6-1.el5.rf.i386.rpm

第三步

yum -y install –enablerepo=rpmforge memcached php-pecl-memcache
pecl install memcache

启动

servive memcached start