CD
Cloudflare Developers•2mo ago
an

Caches is randomly deleted

Hi, I don't know why, but my cache is set to public, s-maxage=31536000, immutable, and it still expires randomly after a few hours or a day. Any insights about this? Tried searching google but doesnt found any good info I'm certain about this as I checked > 10 times, open devtools to make sure it's removed The logic is simple; I copied it from the doc's example. 
        const inCache = await caches.default.match(new Request(cacheKey, ctx.request))
        const query = new URL(ctx.request.url).searchParams
        if (inCache && !query.get('noCache'))
          return new Response(inCache.clone().body, inCache)
....
        const inCache = await caches.default.match(new Request(cacheKey, ctx.request))
        const query = new URL(ctx.request.url).searchParams
        if (inCache && !query.get('noCache'))
          return new Response(inCache.clone().body, inCache)
....
Why s-maxage: I want to share cache between across accounts
6 Replies
Walshy
Walshy•2mo ago
Cache is a max age not a minimum age. Things can be evicted from cache at any time
an
anOP•2mo ago
Do you mean the cache value can stay in cache storage up to 31536000, in this case? Is there any way to make the cache last longer? Initially I thought I could just save caches, I know they aren't durable and can break any time. But one day or a few hours is too short. Is there any alternative way to make it more durable, only KV?
Walshy
Walshy•2mo ago
KV would be your best bet or get more traffic. We have lots of storage but not infinite, we can't hold everyone's data forever - we need to be able to evict stuff
an
anOP•2mo ago
I want to confirm, if the traffic is good, does it mean the cache might store more than 2 days? assuming I have 1 request every 10 seconds and thanks for suggestion about KV, KV latency now pretty fast and can be the answer here, just want to confirm my understanding
Walshy
Walshy•2mo ago
yes, more traffic hitting the cache would keep it in cache. KV uses Tiered Cache + will be on-par if not slightly faster than the cache API so I'd definitely recommend that route, you'd hit cache anyway through KV but it uses TC so you basically never get a cache MISS, it will be a bit slower if not in local cache but still much faster than origin
an
anOP•2mo ago
yeah thats makes sense, thanks for sharing that, I understand CF infra better now

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