WordPress Powered by Amimoto AMI comes with default plugins upon installation such as Nginx Cache Controller.
If you want to auto delete the cache, open the “Nginx Cache” settings screen menu, select “Yes” in “Enabling Cache Delete”. If you select “No”, it will not cache automatically.
Additionally, if you are rewriting the settings of Nginx, you must set the proxy_cache_path and proxy_cache_key.
Please refer to the following articles: