Introduction to nginx memcache caching

This article mainly introduces the introduction of nginx memcache caching, which has certain reference value. Now I share it with you. Friends in need can refer to it

1 Basically

In a In the lnmp architecture, when nginx encounters dynamic resources, it will reverse proxy and send the request to the back-end php-fpm service. php-fpm reads data from mysql, produces web pages, and then returns it to the client.

If the traffic is large, php-fpm and mysql will become bottlenecks. The solution is to add a memcached cache.

nginx first uses $uri as the key to query the value in memcached. If it hits the value, it will directly return the value to the client. If not, then pass php-fpm. php-fpm returns the data to the client and stores a copy in memcached.

So, here you need the connection between nginx and memcached, and the connection between php and memcached.

2 PHP installs the memcache extension module

PHP does not support operating memcahce and needs to install an interface.

http://pecl.php.net/package/memcacheDownload memcache-2.2.7.tgz

 yum install m4 autoconf
#安装相关依赖
/app/php/bin/phpize
#运行phpize,不然memcache目录下没有configure文件
 ./configure --with-php-config=/app/php/bin/php-config
#安装扩展模块，使用php-config
 make && make install
#安装

After installation, memcache.so will be generated.

In the php/lib/php.ini file, there is a place for dynamic expansion. Add memcache.so to it and restart php-fpm.

In info.php, you can verify the installation

^{3 nginx directly connects to memcache}

    location / {
        set $memcached_key "$uri";
        memcached_pass 127.0.0.1:11211;
        error_page 404 /callback.php;
   }

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