nginx cache issue (http upstream cache: -5)

loopback_proxy nginx-forum at
Mon Feb 5 19:11:49 UTC 2018

Ahhh interesting, that did the trick. Thank you so much. 

I have been also trying to understand the internals of nginx caching and how
it works. I read the nginx blog about the overall architecture and the nginx
man page about proxy_cache_* directives. I am looking for the internal
architecture of the how the caching subsystem works. If you guys have any
documentation or article about it, that would be so useful. 

- Karthik

Posted at Nginx Forum:,278346,278370#msg-278370

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