Max File Size Allowed In Cache

Server NGINX
1

Is there any way to limit the maximum size of an individual object in a
proxy cache? Looking through the documentation (
Module ngx_http_proxy_module ) I’m not
seeing
anything directly related to that.

I might be misunderstanding the proxy_temp_file_write_size or
proxy_max_temp_file_size commands, but outside of limiting the entire
cache
size with proxy_cache_path, I’m not seeing anything that says “this is
the
maximum size of an individual file that can sit in cache”.

Thanks!

Posted at Nginx Forum:

2

would be interesting to know the answer to this questions as I was
wondering
as well if that is possible.

Thanks for the response!

Posted at Nginx Forum:

3

Hello!

On Tue, Sep 30, 2014 at 01:35:30AM -0400, martinproinity wrote:

would be interesting to know the answer to this questions as I was wondering
as well if that is possible.

As of now there is no easy way to limit caching based on a
response size. In simple cases, when the Content-Length header is
present in a response, the proxy_no_cache combined with a map (or
embedded perl, or whatever) can be used to disable caching based
on the Content-Length header returned.

See here for documentation:

http://nginx.org/r/proxy_no_cache
http://nginx.org/r/map

–
Maxim D.
http://nginx.org/

4

Hello!

On Tue, Sep 30, 2014 at 11:38:59PM -0400, martinproinity wrote:

Thanks Maxim. Is it possible the filter on a value “larger than” or “smaller
than”? How would the regex in the map block look like? e.g. smaller than
1000000?

I tried something like this, which is not working:
map $upstream_http_content_length $docache {
default 0;
“~*([1-9][0-9]{0,6}|1000)$” 1;
}

You’ve forgot start anchor. Something like this should work to
disable cache for responses with Content-Length larger than
1000000:

map $upstream_http_content_length $nocache {
    default                       1;
    "~^[1-9]{0,6}$"               0;
}

proxy_no_cache $nocache;

–
Maxim D.
http://nginx.org/

5

Thanks Martin! That works.

Posted at Nginx Forum:

6

Thanks Maxim. Is it possible the filter on a value “larger than” or
“smaller
than”? How would the regex in the map block look like? e.g. smaller than
1000000?

I tried something like this, which is not working:
map $upstream_http_content_length $docache {
default 0;
“~*([1-9][0-9]{0,6}|1000)$” 1;
}

Posted at Nginx Forum: