As someone who had some outages due to AI traffic and is now using CloudFlare's tools:
Most of my site is cached in multiple different layers. But some things that I surface to unauthenticated public can't be cached while still being functional. Hammering those endpoints has taken my app down.
Additionally, even though there are multiple layers, things that are expensive to generate can still slip through the cracks. My site has millions of public-facing pages, and a batch of misses that happen at the same time on heavier pages to regenerate can back up requests, which leads to errors, and errors don't result in caches successfully being filled. So the AI traffic keeps hitting those endpoints, they keep not getting cached and keep throwing errors. And it spirals from there.
Most of my site is cached in multiple different layers. But some things that I surface to unauthenticated public can't be cached while still being functional. Hammering those endpoints has taken my app down.
Additionally, even though there are multiple layers, things that are expensive to generate can still slip through the cracks. My site has millions of public-facing pages, and a batch of misses that happen at the same time on heavier pages to regenerate can back up requests, which leads to errors, and errors don't result in caches successfully being filled. So the AI traffic keeps hitting those endpoints, they keep not getting cached and keep throwing errors. And it spirals from there.