Nginx fastcgi_cache没有缓存任何东西

Question

我有一个Nginx服务器设置，启用了fastcgi_cache，但根本没有任何缓存。缓存文件夹为空。我已经尝试过几次重建nginx而没有任何成功。这可能与我在子目录中的$ args为空的其他问题有关，请参阅此处：https://stackoverflow.com/posts/36349729

Nginx构建于：

implicit val convertRes = Json.writes[U]

nginx.conf

 --sbin-path=/usr/sbin --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log 
 --pid-path=/var/run/nginx.pid --lock-path=/var/lock/nginx.lock --http-log-path=/var/log/nginx/access.log 
 --http-client-body-temp-path=/var/lib/nginx/body --http-proxy-temp-path=/var/lib/nginx/proxy 
 --http-fastcgi-temp-path=/var/lib/nginx/fastcgi --with-debug --with-http_stub_status_module 
 --with-http_flv_module --with-http_ssl_module --with-http_dav_module --with-ipv6 --with-http_realip_module

服务器conf：

#user  nobody;
worker_processes  2;

pid     /var/log/nginx.pid;

events {
    worker_connections  1024;
}

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 /var/log/web.access.log  main;

    fastcgi_cache_path /var/run/nginx-cache levels=1:2 keys_zone=WORDPRESS:250m inactive=60m;
    fastcgi_cache_key "$scheme$request_method$host$request_uri";
    fastcgi_cache_use_stale error timeout invalid_header http_500;
    fastcgi_ignore_headers Cache-Control Expires Set-Cookie;

    sendfile        on;
    #tcp_nopush  on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    gzip  on;
    gzip_disable "msie6";

    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_buffers 16 8k;
    gzip_http_version 1.1;
    gzip_types text/plain text/css application/json application/javascript application/x-javascript text/xml application/xml application/xml+rss text/javascript image/svg+xml;

    client_max_body_size 200M;

    # If your domain names are long, increase this parameter.
    server_names_hash_bucket_size 64;

    include /etc/nginx/sites-available/*.conf;
}