我想只关闭 wp-admin 目录下的 php 的 fastcgi_buffering 功能，但是我按如下代码写没有效果，不知道问题在哪里，应该怎么写。

    location ~ \.php$ {
        include snippets/fastcgi-php.conf;
        fastcgi_pass unix:/run/php/php7.0-fpm.sock;
        fastcgi_connect_timeout 600;
        fastcgi_send_timeout 600;
        fastcgi_read_timeout 600;
        fastcgi_buffer_size 64k;
        fastcgi_buffers 4 64k; 
        fastcgi_busy_buffers_size 128k;
        fastcgi_temp_file_write_size 128k;
        # fastcgi cache
        fastcgi_cache_bypass $no_cache;
        fastcgi_no_cache $no_cache;
        fastcgi_cache WORDPRESS;
        fastcgi_cache_valid 200 301 302 1d;
        add_header X-Cache "$upstream_cache_status From $host";
    }

    location ~ wp-admin/\.php$ {
        fastcgi_buffering off; # Making the updates in Wordpress real time.
    }