How do I fix `Rate limit exceeded` errors when logging metrics?

If you receive an HTTP 429 Rate limit exceeded error when calling wandb.log(), you are exceeding the rate limit quota for your project. W&B applies rate limits per project, and paid plans have higher limits than free plans.

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How to stay under the rate limit

1. Update your W&B SDK: The latest version includes optimized mechanisms for retrying requests and managing quota usage.
   pip install --upgrade wandb
   
2. Reduce logging frequency: Log metrics less often. For example, log every N epochs instead of every epoch:
   for epoch in range(100):
       if epoch % 5 == 0:
           wandb.log({"acc": accuracy, "loss": loss})
   
3. Sync data manually: If you are rate limited, W&B stores your run data locally. You can sync it later with:
   wandb sync <run-file-path>
   

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Rate limit headers

When rate limited, the response includes these headers: If RateLimit-Remaining is 0, wait for the number of seconds in RateLimit-Reset before retrying. For more information, see Experiments limits and performance.

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Metrics Experiments