TGINSIGHT SIMILAR POSTS
Изворен канал @pythonotes · Post #425 · 20 апр.
Недавно делал быстрый прототип асинхронного приложения в котором требовалось вызывать много синхронного кода. Да, я знаю, что это не лучший дизайн, но нужно было быстрое решение на один процесс и без очередей. Поэтому я выполнял код в потоках. Выглядело это примерно так: from fastapi.concurrency import run_in_threadpool async def execute(data: DataRequest) -> DataResponse: try: result = await run_in_threadpool(sync_function, data) return DataResponse(data=result) except Exception as e: return DataResponse( error=str(e), success=False, ) В общем работает нормально. Для всех вызовов под капотом используется общий тредпул, всё работает предсказуемо. Но потребовалось изменить количество запускаемых в пуле потоков (по умолчанию создается 40 воркеров). Так как дело происходит с FastAPI, делается это через lifespan используя настройки anyio: import anyio @asynccontextmanager async def lifespan(app: FastAPI): limiter = anyio.to_thread.current_default_thread_limiter() limiter.total_tokens = 100 yield # если вдруг нужно вернуть обратно limiter.total_tokens = 40 Зачем менять количество воркеров? - уменьшить, если оперативки мало (один тред занимает ~8мб) - увеличить чтобы выдержать нагрузку Если есть предложения получше при тех же вводных - предлагайте😉 #async
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Пребарај: #vision11official
@vision11official · Post #1345 · 12.09.2023 г., 10:01
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@vision11official · Post #1041 · 06.01.2023 г., 16:29
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@vision11official · Post #1110 · 06.02.2023 г., 07:31
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@vision11official · Post #1231 · 15.06.2023 г., 15:36
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@vision11official · Post #1229 · 09.06.2023 г., 12:08
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@vision11official · Post #1220 · 25.05.2023 г., 14:01
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@vision11official · Post #1217 · 16.05.2023 г., 14:31
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@vision11official · Post #1225 · 30.05.2023 г., 16:28
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@vision11official · Post #1221 · 27.05.2023 г., 10:08
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@vision11official · Post #1209 · 02.05.2023 г., 15:31
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@vision11official · Post #1213 · 12.05.2023 г., 11:31
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@vision11official · Post #1034 · 04.01.2023 г., 07:22
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