question about proxy cache

[Michał Jaszczyk]

Hey,

I'm having some problems with proxy_cache. Upstream responds with
Cache-Control and Expires headers set to 30 days. My Nginx is
configured like this:

       proxy_cache_path /var/lib/storage levels=2:2
keys_zone=storage:1024m max_size=102400m;

       # unimportant stuff cut out

       location /storage {
            internal;

            rewrite ^/storage(.*)$ $1 break;

            proxy_method GET;
            proxy_pass_request_headers off;
            proxy_pass_request_body off;

            proxy_pass http://storage;

            proxy_intercept_errors on;

            proxy_cache storage;
            proxy_cache_valid 200 30d;
            proxy_cache_valid any 1h;
        }

I chose random path on my upstream (something like
/repository/data/3e960a013c9f00000000000000004a1bcf4b10f075cf0000) and
I see that Nginx accesses this path very frequently - few times a day.
I thought that the above config would make Nginx access this path only
once a month. The cache is far from being full. What am I doing wrong?

Regards,

-- 
Michał Jaszczyk