Add limit on concurrent requests for doc-qa #64
Merged
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This PR adds a
RequestLimiter
class to limit concurrent requests for a given endpoint.In the case of question answering on very large documents, the requests can take several seconds. With the default FastAPI/Uvicorn/Gunicorn deployment, the requests get processed concurrently on a GPU, slowing down all the requests. To provide consistent user experience, the API can respond with a server-busy error code if the in-process requests exceed the limit threshold.