[simo7]

Interesting, I’m starting to think undocumented thresholds are quite common in GCP.

I experienced something similar with Clod Run: inexplicable scaling events based on CPU utilization and concurrent requests (the two metrics that regulate scaling according to their docs).

After a lot of back and forth with their (premium) support it turns out there are additional criteria, smthg related to request duration, but of course nobody was able to explain in details.

[klon]

Yes, we have also experienced undocumented limits for Cloud Run. For us it was an obscure quota for max network packages per second per instance. Really infuriating and took 6 months to track down what it was. I think it has been documented here now: https://cloud.google.com/run/quotas#cloud_run_bandwidth_limi...

[politelemon]

Unnanounced changes too, there was a Firefox outage in 2022 due to GCP:

https://hacks.mozilla.org/2022/02/retrospective-and-technica...

[merb]

sorry but the blame here was 100% on Mozilla. No matter which http version, headers should always be treated as case-insensitive. Blanking anything on google here is just stupid. The problem was nih-syndrome and ignored the http spec.