3

目前我正在为未登录的用户使用 fastcgi_cache 进行缓存，并使用（ if + fastcgi_no_cache + fastcgi_cache_bypass ）将登录的用户直接传递到后端，即 PHP-FPM。

这项工作已经足够好，但是当 PHP-FPM 开始达到 500+ req/s 时，缓慢/加载开始。

所以我在想的是为登录用户创建一个缓存，每个用户都有自己的缓存文件，这可能吗？如果是的话，请你给我一些建议。我已经护目镜了很多，但没有任何帮助。

使用 mysql 和 memcached 和 apc 运行自定义 php cms 的站点

猫 /etc/nginx/nginx.comf

user  username username;

worker_processes     8;
worker_rlimit_nofile 20480;

pid /var/run/nginx.pid;

events {

    worker_connections 10240;
    use epoll;
}

http {
    include       mime.types;
    default_type  application/octet-stream;


    log_format main '$remote_addr - $remote_user [$time_local] '
            '"$request" $status  $body_bytes_sent "$http_referer" '
            '"$http_user_agent" "$http_x_forwarded_for"';
    access_log      off;
    error_log   /var/log/nginx/error.log    warn;
    log_not_found       off;
    log_subrequest      off;

    server_tokens       off;
    sendfile        on;
    tcp_nopush          on;
    tcp_nodelay         on;
    keepalive_timeout   3;
    keepalive_requests  50;
    send_timeout        120;    
    connection_pool_size    256;
    chunked_transfer_encoding on;
    ignore_invalid_headers   on;
    client_header_timeout   60; 
    large_client_header_buffers 4 128k;
    client_body_in_file_only off;
    client_body_buffer_size 512K;
    client_max_body_size    4M;
    client_body_timeout 60;
    request_pool_size   32k;
    reset_timedout_connection on;
    server_name_in_redirect off;
    server_names_hash_max_size 4096;
    server_names_hash_bucket_size 256;
    underscores_in_headers  off;
    variables_hash_max_size 4096;
    variables_hash_bucket_size 256;

    gzip            on;
    gzip_buffers        4 32k;
    gzip_comp_level     1;
    gzip_disable            "MSIE [1-6]\.";
    gzip_min_length     0;
    gzip_proxied        any;
    gzip_types      text/plain text/css application/x-javascript text/javascript text/xml application/xml application/xml+rss application/atom+xml;

    open_file_cache     max=3000 inactive=20s;
    open_file_cache_min_uses 1;
    open_file_cache_valid   20s;
    open_file_cache_errors  off;

    fastcgi_buffer_size     8k;
    fastcgi_buffers         512 8k;
    fastcgi_busy_buffers_size   16k;
    fastcgi_cache_methods   GET HEAD;
    fastcgi_cache_min_uses  1;
    fastcgi_cache_path /dev/shm/nginx levels=1:2 keys_zone=website:2000m inactive=1d max_size=2000m;
    fastcgi_connect_timeout 60;
    fastcgi_intercept_errors on;
    fastcgi_pass_request_body on;
    fastcgi_pass_request_headers on;
    fastcgi_read_timeout    120;
    fastcgi_send_timeout    120;
    proxy_temp_file_write_size 16k;

    fastcgi_max_temp_file_size  1024m;

    include /etc/nginx/vhosts/*.conf;

}

虚拟主机设置： 

server {

    listen 80;
    server_name domain.com;

    access_log  off;
    error_log  /var/log/nginx/error.log warn;
    root /home/username/public_html;

    location ~ \.php$ {

        # pass cache if logged in
        set $nocache "";
                if ($http_cookie ~ (MyCookieUser*|MyCookiePass*)) {
                  set $nocache "Y";
                }
                fastcgi_no_cache $nocache;
                fastcgi_cache_bypass $nocache;
        fastcgi_cache       website;
        fastcgi_cache_key         $host$uri$is_args$args;
        fastcgi_cache_valid       200 301 302 304 40s;
        fastcgi_cache_valid       any 5s;
        fastcgi_cache_use_stale error timeout invalid_header updating http_500 http_503 http_404;
        fastcgi_ignore_headers  Set-Cookie;
        fastcgi_hide_header     Set-Cookie;
        fastcgi_ignore_headers  Cache-Control;
        fastcgi_hide_header     Cache-Control;
        fastcgi_ignore_headers  Expires;
        fastcgi_hide_header     Expires;
                fastcgi_no_cache $nocache;
                fastcgi_cache_bypass $nocache;
                fastcgi_index  index.php;
                fastcgi_pass 127.0.0.1:8081;
                fastcgi_param  SCRIPT_FILENAME  /home/username/public_html$fastcgi_script_name;
                include /etc/nginx/fastcgi_params;

    }

    location ~* ^.+\.(jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|pdf|ppt|txt|mid|swf|midi|wav|bmp|js)$ {
        root            /home/username/public_html;
        expires             max;
        add_header          Cache-Control   cache;
    }

}

php-fpm 配置 

emergency_restart_threshold = 10
emergency_restart_interval = 60s
process_control_timeout =10s
rlimit_files = 102400
events.mechanism = epoll
[www]
user = username
group = username
listen = 127.0.0.1:8081
listen.backlog = 10000
pm = dynamic
pm.max_children = 2048
pm.start_servers = 64
pm.min_spare_servers = 20
pm.max_spare_servers = 128
pm.process_idle_timeout = 10s;
pm.max_requests = 50000
request_slowlog_timeout = 40s
request_terminate_timeout = 60s

还需要改变 php cms 运行自己的 cookie 的方式吗？

服务器内存：32GB DDR3 处理器：双 E5620 Centos6 64bit

4

2 回答 2

2

只是一个建议（以及我目前正在做的事情）......

当您在站点的“登录”部分时，为什么不为 nginx 从其上游 cgi 服务器 (php-fpm) 获取的每个唯一 cookie 使用不同的缓存 - 这或多或少意味着每个登录用户都将获得自己的缓存 - 它不是最佳的，但会有所帮助。

如果您想开始使用带有 cookie/动态内容等的真正精美的缓存选项，您可能需要在 nginx 前面使用 varnish-cache。

我也有某些位置会在访问时清除缓存的任何缓存数据（对于该 URI），例如 /admin 或 /system 等 - 我想要的最后一件事是 nginx 提供我的管理后端的缓存副本及其所有敏感信息php-fpm 离线时的黑客。

于 2012-10-02T02:01:15.103 回答
2

您可能会喜欢这个 WordPress 示例：

        set $cs_session "";
        if ($http_cookie ~* "wordpress_logged_in_[^=]*=([^%]+)%7C") {
                set $cs_session wordpress_logged_in_$1;
        }

fastcgi_cache_key               "$scheme$request_method$host$request_uri$cs_session";
于 2014-10-28T15:00:14.720 回答