Proxy_cache_path question

Server NGINX
1

Hi list,

I’m trying to limit the amount of data nginx caches but can’t get it to
work properly.

I’m using the following line to limit the cache:

proxy_cache_path /var/tmp/nginx/cache levels=1:2 keys_zone=cache:32m
inactive=1440 max_size=32m;

Is my assumption correct that this cache cannot grow any bigger than
32Mb? What I see in my case is /var/tmp/nginx/cache grows well above
32Mb (in my test I’ve seen 46Mb).

Does anybody has a suggestion to get the cache limit to work?

Regards,

Marlon

2

On Thu, Apr 29, 2010 at 11:24:51AM +0200, Marlon de Boer wrote:

Is my assumption correct that this cache cannot grow any bigger than
32Mb? What I see in my case is /var/tmp/nginx/cache grows well above
32Mb (in my test I’ve seen 46Mb).

Does anybody has a suggestion to get the cache limit to work?

It may be bigger at least for two reasons:

  1. nginx counts only file size rounded to file system block size.
    For example, on UFS it’s fragment size.
    As I understand, “du” counts in 1K blocks.
  2. levels=1:2 means that nginx will create at least 8M directory
    hierarchy.

–
Igor S.
http://sysoev.ru/en/