caching - Why nginx does not cache my content? -

i checked cache path /usr/local/nginx/proxy_cache. no cache file found after visit url many times.

my configuration: ngnix.conf

http {    include       /etc/nginx/mime.types;     default_type  application/octet-stream;     access_log   /var/log/nginx/access.log;     sendfile        on;    #tcp_nopush     on;     #keepalive_timeout  0;    keepalive_timeout  65;    tcp_nodelay        on;     client_body_buffer_size  512k;        proxy_temp_file_write_size 128k;      proxy_temp_path   /usr/local/nginx/proxy_temp;      proxy_cache_path /usr/local/nginx/proxy_cache levels=1:2 keys_zone=content:20m inactive=1d max_size=100m;        gzip  on;     include /etc/nginx/conf.d/*.conf;    include /etc/nginx/sites-enabled/*; } 

default

server { listen   80; server_name  208.115.202.87;      location  /test {          proxy_cache content;       proxy_cache_key $host$uri$is_args$args;          proxy_cache_valid  200 15m;      proxy_pass  http://aaa.com/;     } 

nginx not cache pages sets cookies, check if pages have set-cookie header.

if necessary, cookies can ignored proxy_ignore_headers , suppressed proxy_hide_header. example:

proxy_ignore_headers set-cookie; proxy_hide_header set-cookie;