Frequently Asked Questions
Do I still need to create "Edge Cache TTL" page rules with "Cache Level: Cache Everything"?
No, you don't need create Edge Cache TTL page rules. When the WordPress plugin is installed, APO automatically caches content for 30 days and invalidates on change within 30 seconds. However, because APO now supports cache-related page rules, make sure existing page rules don't affect the resources served by APO.
Does Origin Cache Control override APO?
No. APO ignores Origin Cache Control for caching on the Edge, but APO serves original Origin Cache Control to the client.
Why are my browser cache control headers missing with APO?
The browser cache control headers may be missing with APO if you set your browser to cache TTL to "respect existing headers." For example:
$ curl -sv -o /dev/null https://example.com/ -H 'Accept: text/html' 2>&1 | grep cache-control< cache-control: max-age=86400, stale-while-revalidate=86400, stale-if-error=86400
Is the stale-if-error directive still needed with APO?
No, the stale-if-error directive is not needed because the feature is built into APO.
When I check the posts and homepage cache status, the response header shows
cf-cache-status: BYPASS. Is APO working?
When Chrome DevTools is open, Chrome sends
Cache-Control: no-cache by default. You can uncheck the Disable cache (while DevTools is open) setting and see that
cf-cache-status: HIT and
cf-apo-via: cache headers will be returned.
When I check
cf-cache-status via cURL,
DYNAMIC are always returned. In my browser, I see
HIT but other tools return
DYNAMIC. Is this expected behavior?
Yes, this is expected behavior because the requests must contain
Are Google Fonts optimized when APO is activated?
Yes, Google Fonts are also optimized when APO is activated. You can confirm the optimization by checking the font URLs. For example, the URL will change from
https://example.com/fonts.gstatic.com/s/... when the site loads. For proxied fonts, the
cf-apo-via:proxy header is returned.