fastcgi_cache_use_stale

Syntax:	`fastcgi_cache_use_stale error \| timeout \| invalid_header \| updating \| http_500 \| http_503 \| http_403 \| http_404 \| off ...;`
Default:	`fastcgi_cache_use_stale off;`
Context:	`http`, `server`, `location`

Determines in which cases a stale cached response can be used when an error occurs during communication with the FastCGI server. The directive’s parameters match the parameters of the fastcgi_next_upstream directive.

The error parameter also permits using a stale cached response if a FastCGI server to process a request cannot be selected.

Additionally, the updating parameter permits using a stale cached response if it is currently being updated. This allows minimizing the number of accesses to FastCGI servers when updating cached data.

To minimize the number of accesses to FastCGI servers when populating a new cache element, the fastcgi_cache_lock directive can be used.

Links:

https://nginx.org/en/docs/http/ngx_http_fastcgi_module.html#fastcgi_cache_use_stale

doc_nginx

2017-02-09 07:06:04

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