How to set the lifetime of a page cached in nginx?

Question

Nginx

Good afternoon. I have an online store. The output works through nginx. Often there is a problem that people are given a cached copy of the page, and at that moment, for example, a discount on some product starts to work and people are shown a product with the wrong price.
Or how to reset the current cache so that people stop seeing the cached copy?

Answer 1

We look for a key with the proxy_cache_key format in the proxy_cache_path with the necessary data and delete it. Or use advanced caching methods like varnish