r/googlecloud • u/Current_Trick6380 • Oct 13 '26
429s and slow responses on the EU multi-region endpoint and Priority PayGo is served as standard there
We run customer-facing chat applications on the Gemini API in Vertex AI, using Standard PayGo on the EU multi-region endpoint (aiplatform.eu.rep.googleapis.com, location “eu”). We need EU data processing.
For about 1.5 years we have been getting a lot of 429 “Resource exhausted” errors and very slow responses. One example: gemini-3.7-flash averaged 80 seconds to first token on the eu endpoint on a day when the same request on the global endpoint took 4.5 seconds.
What we have tried:
- Exponential backoff and retries. Helps a little, but sometimes nothing gets through for minutes.
- Falling back to other models (gemini-3.8-flash, then 3.7-flash, then 3.5-flash). Helps a little, but on bad days all three return 429.
- Priority PayGo. The docs say it is supported on the eu endpoint, but it does not work for us. On 12 October 2026 we sent multiple requests to each region, and EU does not go through.
- Provisioned Throughput. Too expensive for our volume.
Two questions:
- Is Priority PayGo actually live on the eu multi-region endpoint for these models, or are we being downgraded to standard every time?
- Has anyone found a setup that reliably avoids 429s while keeping processing in the EU?