源码安装memcached和php memcache扩展
注：以下安装步骤以centos6.5系统为例。
一、安装前准备 1、下载源码包 http://www.memcached.org/
目前最新版本是http://www.memcached.org/files/memcached-1.4.24.tar.gz
2、安装libevent 由于memcached依赖于libevent库,因此需要安装libevent
#yum install libevent libevent-devel
二、安装memcached 1、创建memcached用户 #useradd -d /var/run/memcached/ -s /sbin/nologin -c memcached daemon memcached
2、解压源码包 #tar zxvf memcached-1.4.24.tar.gz
3、编译安装 #cd memcached-1.4.24
#./configure --prefix=/usr/local/memcached
#make && make install
4、memcached常用参数说明 -m memcache最大可用内存数（单位：m）
-u 用户
-l 监听ip
-p 端口号
三、添加service脚本 #vi /etc/rc.d/init.d/memcached
内容如下 #! /bin/sh
#
# chkconfig: - 55 45
# description: the memcached daemon is a network memory cache service.
# processname: memcached
# config: /etc/sysconfig/memcached
# pidfile: /var/run/memcached/memcached.pid
# standard lsb functions
#. /lib/lsb/init-functions
# source function library.
. /etc/init.d/functions
ip=127.0.0.1
port=11211
user=memcached
maxconn=1024
cachesize=64
options=
# check that networking is up.
. /etc/sysconfig/network
if [ $networking = no ]
then
exit 0
fi
retval=0
prog=memcached
pidfile=${pidfile-/var/run/memcached/memcached.pid}
lockfile=${lockfile-/var/lock/subsys/memcached}
start () {
echo -n $starting $prog: # ensure that /var/run/memcached has proper permissionsif [ `stat -c %u /var/run/memcached` != $user ]; then chown $user /var/run/memcachedfidaemon --pidfile ${pidfile} /usr/local/memcached/bin/memcached -d -l $ip -p $port -u $user -m $cachesize -c $maxconn -p ${pidfile} $optionsretval=$?echo[ $retval -eq 0 ] && touch ${lockfile}
}
stop () {
echo -n $stopping $prog: killproc -p ${pidfile} /usr/local/memcached/binretval=$?echoif [ $retval -eq 0 ] ; then rm -f ${lockfile} ${pidfile}fi
}
restart () {
stop start
}
# see how we were called.
case $1 in
start)
start;;
stop)
stop;;
status)
status -p ${pidfile} memcachedretval=$?;;
restart|reload|force-reload)
restart;;
condrestart|try-restart)
[ -f ${lockfile} ] && restart || :;;
*)
echo $usage: $0 {start|stop|status|restart|reload|force- reload|condrestart|try-restart}retval=2 ;;
esac
exit $retval 四、测试 1、启动memcached服务 #/etc/rc.d/init.d/memcached start
默认memcached服务监听在127.0.0.1:11211
2、测试 #telnet 127.0.0.1 11211
输入 stats，正常显示如下，说明安装成功 trying 127.0.0.1...
connected to 127.0.0.1.
escape character is '^]'.
stats
stat pid 12246
stat uptime 2444
stat time 1442302696
stat version 1.4.24
stat libevent 2.0.22-stable
stat pointer_size 64
stat rusage_user 0.089986
stat rusage_system 0.027995
stat curr_connections 5
stat total_connections 7
stat connection_structures 6 五、安装memcached-tool工具 memcached-tool是memcached监控工具，是一个perl脚本，可以直接运行。命令用法如下。
usage: memcached-tool [mode]
memcached-tool 10.0.0.5:11211 display # shows slabs memcached-tool 10.0.0.5:11211 # same. (default is display) memcached-tool 10.0.0.5:11211 stats # shows general stats memcached-tool 10.0.0.5:11211 dump # dumps keys and values
六、安装php memcache扩展 1、下载源码包 memcache-3.0.8.tgz
2、安装memcache扩展 #tar zxvf memcache-3.0.8.tgz
#cd memcache-3.0.8
#/usr/local/php/bin/phpize
#./configure --with-php-config=/usr/local/php/bin/php-config
#make && make install
3、修改配置文件php.ini 添加 extension=memcache.so
4、测试 重启nginx和php-fpm，查看phpinfo（）显示如下有信息，说明安装成功。 registered save handlers files user memcache
memcache support enabled