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cache_​error

  • Property Manager name: Cache HTTP Error Responses
  • Behavior version: The v2023-01-05 rule format supports the cache_​error behavior v1.1.
  • Rule format status: GA, stable
  • Access: Read/Write
  • Allowed in includes: Yes

Caches the origin's error responses to decrease server load. Applies for 10 seconds by default to the following HTTP codes: 204, 305, 400, 404, 405, 501, 502, 503, 504, and 505.

OptionTypeDescriptionRequires
enabledboolean

Activates the error-caching behavior.

{"displayType":"boolean","tag":"input","type":"checkbox"}
ttlstring (duration)
Overrides the default caching duration of 10s. Note that if set to 0, it is equivalent to no-cache, which forces revalidation and may cause a traffic spike. This can be counterproductive when, for example, the origin is producing an error code of 500.
{"displayType":"string","tag":"input","type":"text"}
{"if":{"attribute":"enabled","op":"eq","value":true}}
preserve_​staleboolean 
When enabled, the edge server preserves stale cached objects when the origin returns 400, 500, 502, 503, and 504 error codes. This avoids re-fetching and re-caching content after transient errors.
{"displayType":"boolean","tag":"input","type":"checkbox"}
{"if":{"attribute":"enabled","op":"eq","value":true}}