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The HTTP Response Cache policy adds the capability for API Proxies to cache reoccurring and/or static HTTP responses to manage latency, decrease response times, and reduce load on a proxied server. By default, cached HTTP responses are stored based on the proxy's URL and request method. Additionally, you can configure cache responses for specified request header keys and query string keys. Following policy configuration, cached responses are returned to HTTP clients instead of requesting resources from the proxied server.
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Because API Versions use endpoints generated in the SnapLogic IIP, the HTTP Response Cache policy supports Proxy endpoints only by design. In the UI, the API Policy Manager menus API and Version Details tabs do not display this policy.
The entire HTTP response is cached, including headers.
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We limit each policy to store 100 entries in the cache per policy. Accordingly, the policy evicts the least used entry after 100.
Expired caches cannot be accessed, and new entries overwrite any existing ones. The maximum quantity of bytes that an HTTP response caches Response Caches in the default configuration is 85.83 MB of the payload.
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When future requests are made to the proxy endpoint for Request 1, Request 2, and Request 3, HTTP responses can be served from the HTTP Response Cache policy with payloads from Response 1, Response 2, and Response 3 instead of querying the upstream server, and therefore, freeing up computation resources for other operations.
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