????????Lnmp下安装memcached
1、先安装 libevent,再安装 Memcached主程序
# tar xf libevent-2.0.21-stable.tar.gz
# cd libevent-2.0.21-stable
# ./configure --prefix=/usr/local/libevent
# make
# make install
2、Memcached 安装?
# tar xf memcached-1.4.21.tar.gz
# cd memcached-1.4.21
# ./configure --prefix=/usr/local/memcached --with-libevent=/usr/local/libevent/
# make
# make install
3、服务器端安装结果测试：
# /usr/local/memcached/bin/memcached -d -m 512 -u root
# ss -tnulp | grep 11211
# pkill memcached
4、Memcached 和 PHP 结合使用
①php Memcached 扩展 安装 ? memcache-2.2.6.tgz
# tar xf memcache-2.2.7.tgz
# cd memcache-2.2.7
# /usr/local/php5/bin/phpize
# ./configure --enable-memcache --prefix=/usr/local/memcache --with-php-config=/usr/local/php5/bin/php-config --with-zlib-dir
# make
# make install
# vim /usr/local/php5/php.ini #加入下面两行，最后一行要看实际情况
extension=memcache.so
extension="/usr/local/php5/lib/php/extensions/no-debug-non-zts-20090626/"
# service nginx restart #重启nginx
# /usr/local/memcached/bin/memcached -d -m 512 -u root #启动memcached
#memcached?-d?-m?10?-u?root?-l?localhost?-p?11211?-c?256?-P?/tmp/memcached.pid?
此命令仅作为讲解下面参数
各个参数的详解
1.??-d选项是启动一个守护进程，
2.??-m是分配给Memcached使用的内存数量，单位是MB,
3.??-u是运行Memcache的用户，我这里是root，
4.??-l是监听的服务器IP地址,
5.??-p是设置Memcache监听的端口，最好是1024以上的端口，
6.??-c选项是最大运行的并发连接数，默认是1024,按照你服务器的负载量来设定，
7.??-P是设置保存Memcache的pid文件
②测试memcached是否能与php配合使用
# vim /usr/local/nginx/html/mem_test.php
# vim mem.php
<?php
$mem = new Memcache;
$mem->connect( ‘127.0.0.1‘ , 11211);
$mem->set (‘test‘ , "hello world!" , 0 ,12);
$val = $mem->get( ‘test‘);
echo $val;
?>
# curl http://192.168.131.135/mem.php
出现"hello world！"则说明memcache php扩展成功了