How to set the default Edge Cache TTL

[200706991]

Is it possible to set the value of Edge Cache TTL just like Browser Cache TTL. There is an option under Caching for Browser Cache TTL, but nothing for Edge Cache TTL.

I’d like to know if there’s an official doc, which tells the default value of it and how to change it.

Does set a page rule for all resources work? Will it change other default behavior of Cloudflare if I just set Edge Cache TTL? Will it stop caching?

I don’t get why there is no option for it…
Thank you guys!

[jwds1978]

Edge Cache TTL

Cloudflare will respect your origin expires / cache control headers to calculate the Edge Cache TTL (providing you don’t override it with a page rule setting an explicit Edge Cache TTL). Note that as with any cache your item may be evicted if the item is not requested frequently. You can check whether an item is still in the cache by checking the headers: https://support.cloudflare.com/hc/en-us/articles/200169556-How-can-I-tell-if-Cloudflare-is-caching-my-site-or-a-specific-file- If you see …

[eva2000]

@200706991

I’d like to know if there’s an official doc, which tells the default value of it and how to change it.

see https://developers.cloudflare.com/cache/about/edge-browser-cache-ttl/

and https://developers.cloudflare.com/cache/how-to/configure-cache-status-code/

Edge TTL

By default, Cloudflare caches certain HTTP response codes with the following Edge Cache TTL when a cache-control directive or expires response header are not present.

HTTP status code	Default TTL
200, 206, 301	120m
302, 303	20m
404, 410	3m
403	0s
500, 502, 503, 504	0s

[200706991]

@Edge Cache TTL

Cloudflare will respect your origin expires / cache control headers to calculate the Edge Cache TTL

What if my origin doesn’t have these headers? What is the default Edge Cache TTL and how can I change it at the website level?

[eva2000]

See my previous reply. But if you want finer grain control use Cloudflare-cdn-cache-control and/or cdn-cache-control headers at origin side https://developers.cloudflare.com/cache/about/cdn-cache-control/

Blog post https://blog.cloudflare.com/cdn-cache-control/

[200706991]

Thank you so much! Got it!

[200706991]

Hi, this questions just come across my mind.

If I set Edge Cache TTL in a Page Rule, will it apply to all response status code for GET and HEAD methods or just 200 for Get and HEAD methods?

Because you know, even by default not all response status get cached, except for the following:
https://developers.cloudflare.com/cache/how-to/configure-cache-status-code/

[eva2000]

From what I experience, only those status codes regardless of HEAD or GET. You can easily test this with curl on a server/Linux system or via HTTP Header Checker - Check HTTP Response Headers With curl | KeyCDN Tools