maxTtl

Specifies the maximum allowed TTL for cached content served by this origin. Defaults to 86400s (1 day). Cache directives that attempt to set a max-age or s-maxage higher than this, or an Expires header more than maxTtl seconds in the future will be capped at the value of maxTTL, as if it were the value of an s-maxage Cache-Control directive.

• The TTL must be >= 0 and <= 31,536,000 seconds (1 year)

• Setting a TTL of "0" means "always revalidate"

• The value of maxTtl must be equal to or greater than defaultTtl.

• Fractions of a second are not allowed. When the cache mode is set to "USE_ORIGIN_HEADERS", "FORCE_CACHE_ALL", or "BYPASS_CACHE", you must omit this field. A duration in seconds terminated by 's'. Example: "3s".