srcache_store
The 'srcache_store' directive defines the caching methods and response statuses for caching subrequests in NGINX.
Description
The 'srcache_store' directive allows you to specify which request methods and HTTP response statuses should be cached when using the transparent subrequest-based caching layout provided by the ngx_srcache module. You can supply 2-3 parameters: a list of HTTP methods (e.g., GET, POST) and a list of response statuses (e.g., 200, 404) that should be cached. If you provide only the methods, the default status is assumed to be 200. This directive is crucial for optimizing caching behavior, as it dictates how responses are stored based on the method and status, enhancing the performance of your application by reducing server load and speeding up response times for frequently accessed content.
Config Example
location /example {
srcache_store GET 200 404;
}Ensure that the specified methods make sense for the caching strategy—caching POST responses can lead to unwanted behavior.
Remember that the default behavior is to cache only responses with a 200 status unless otherwise specified.
Be cautious with cache invalidation; improper usage can lead to stale data being served.