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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Visa/NIN/Passport Application Discount (PAD)
Everyone can finally use "PAD" to gain up to 10% discount when applying for Nigerian passport, NIN or VISA.
✅ Avoid paying twice through unofficial sources or scammers who hide behind unregistered businesses.
✅ Avoid mistakes in the application process that will cost you time, energy and money.
Other Benefits?
1. We'll guide you on all that you need to do to successful apply for passport/visa issuance or re-issuance from start to finish.
2. We'll offer you a discount on payment for passport issuance or re-issuance or Nigerian VISA application in some cases.
3. We'll guide you on other documents that you might need after getting your passport/Visa.
4. We'll guide you on travel and accommodation plans if you have to travel to Moscow from another city.
5. We'll offer assistance in the case of delays or deliver your passport to you.
Yours in service,
Dr. Godwin Ibe
Chairman, NIDO Russia
+79262385618
https://t.me/nido_russia/1905
#pad#visa#nin#passport
Visa/NIN/Passport Application Discount (PAD)
Everyone can finally use "PAD" to gain up to 10% discount when applying for Nigerian passport, NIN or VISA.
✅ Avoid paying twice through unofficial sources or scammers who hide behind unregistered businesses.
✅ Avoid mistakes in the application process that will cost you time, energy and money.
Other Benefits?
1. We'll guide you on all that you need to do to successful apply for passport/visa issuance or re-issuance from start to finish.
2. We'll offer you a discount on payment for passport issuance or re-issuance or Nigerian VISA application in some cases.
3. We'll guide you on other documents that you might need after getting your passport/Visa.
4. We'll guide you on travel and accommodation plans if you have to travel to Moscow from another city.
5. We'll offer assistance in the case of delays or deliver your passport to you.
Yours in service,
Dr. Godwin Ibe
Chairman, NIDO Russia
+79262385618
https://t.me/nido_russia/1723
#pad#visa#nin#passport
Visa/NIN/Passport Application Discount (PAD)
Everyone can finally use "PAD" to gain up to 10% discount when applying for Nigerian passport, NIN or VISA.
✅ Avoid paying twice through unofficial sources or scammers who hide behind unregistered businesses.
✅ Avoid mistakes in the application process that will cost you time, energy and money.
Other Benefits?
1. We'll guide you on all that you need to do to successful apply for passport/visa issuance or re-issuance from start to finish.
2. We'll offer you a discount on payment for passport issuance or re-issuance or Nigerian VISA application in some cases.
3. We'll guide you on other documents that you might need after getting your passport/Visa.
4. We'll guide you on travel and accommodation plans if you have to travel to Moscow from another city.
5. We'll offer assistance in the case of delays or deliver your passport to you.
Yours in service,
Dr. Godwin Ibe
Chairman, NIDO Russia
+79262385618
https://t.me/nido_russia/1723
#pad#visa#nin#passport
Visa/NIN/Passport Application Discount (PAD)
Everyone can finally use "PAD" to gain up to 10% discount when applying for Nigerian passport, NIN or VISA.
✅ Avoid paying twice through unofficial sources or scammers who hide behind unregistered businesses.
✅ Avoid mistakes in the application process that will cost you time, energy and money.
Other Benefits?
1. We'll guide you on all that you need to do to successful apply for passport/visa issuance or re-issuance from start to finish.
2. We'll offer you a discount on payment for passport issuance or re-issuance or Nigerian VISA application in some cases.
3. We'll guide you on other documents that you might need after getting your passport/Visa.
4. We'll guide you on travel and accommodation plans if you have to travel to Moscow from another city.
5. We'll offer assistance in the case of delays or deliver your passport to you.
Yours in service,
Dr. Godwin Ibe
Chairman, NIDO Russia
+79262385618
https://t.me/nido_russia/1723
#pad#visa#nin#passport
Visa/NIN/Passport Application Discount (PAD)
Everyone can finally use "PAD" to gain up to 10% discount when applying for Nigerian passport, NIN or VISA.
✅ Avoid paying twice through unofficial sources or scammers who hide behind unregistered businesses.
✅ Avoid mistakes in the application process that will cost you time, energy and money.
Other Benefits?
1. We'll guide you on all that you need to do to successful apply for passport/visa issuance or re-issuance from start to finish.
2. We'll offer you a discount on payment for passport issuance or re-issuance or Nigerian VISA application in some cases.
3. We'll guide you on other documents that you might need after getting your passport/Visa.
4. We'll guide you on travel and accommodation plans if you have to travel to Moscow from another city.
5. We'll offer assistance in the case of delays or deliver your passport to you.
Yours in service,
Dr. Godwin Ibe
Chairman, NIDO Russia
+79262385618
https://t.me/nido_russia/1723
#pad#visa#nin#passport
Visa/NIN/Passport Application Discount (PAD)
Everyone can finally use "PAD" to gain up to 10% discount when applying for Nigerian passport, NIN or VISA.
✅ Avoid paying twice through unofficial sources or scammers who hide behind unregistered businesses.
✅ Avoid mistakes in the application process that will cost you time, energy and money.
Other Benefits?
1. We'll guide you on all that you need to do to successful apply for passport/visa issuance or re-issuance from start to finish.
2. We'll offer you a discount on payment for passport issuance or re-issuance or Nigerian VISA application in some cases.
3. We'll guide you on other documents that you might need after getting your passport/Visa.
4. We'll guide you on travel and accommodation plans if you have to travel to Moscow from another city.
5. We'll offer assistance in the case of delays or deliver your passport to you.
Yours in service,
Dr. Godwin Ibe
Chairman, NIDO Russia
+79262385618
https://t.me/nido_russia/1723
#pad#visa#nin#passport
Visa/NIN/Passport Application Discount (PAD)
Everyone can finally use "PAD" to gain up to 10% discount when applying for Nigerian passport, NIN or VISA.
✅ Avoid paying twice through unofficial sources or scammers who hide behind unregistered businesses.
✅ Avoid mistakes in the application process that will cost you time, energy and money.
Other Benefits?
1. We'll guide you on all that you need to do to successful apply for passport/visa issuance or re-issuance from start to finish.
2. We'll offer you a discount on payment for passport issuance or re-issuance or Nigerian VISA application in some cases.
3. We'll guide you on other documents that you might need after getting your passport/Visa.
4. We'll guide you on travel and accommodation plans if you have to travel to Moscow from another city.
5. We'll offer assistance in the case of delays or deliver your passport to you.
Yours in service,
Dr. Godwin Ibe
Chairman, NIDO Russia
+79262385618
https://t.me/nido_russia/1723
#pad#visa#nin#passport
Visa/NIN/Passport Application Discount (PAD)
Everyone can finally use "PAD" to gain up to 10% discount when applying for Nigerian passport, NIN or VISA.
✅ Avoid paying twice through unofficial sources or scammers who hide behind unregistered businesses.
✅ Avoid mistakes in the application process that will cost you time, energy and money.
Other Benefits?
1. We'll guide you on all that you need to do to successful apply for passport/visa issuance or re-issuance from start to finish.
2. We'll offer you a discount on payment for passport issuance or re-issuance or Nigerian VISA application in some cases.
3. We'll guide you on other documents that you might need after getting your passport/Visa.
4. We'll guide you on travel and accommodation plans if you have to travel to Moscow from another city.
5. We'll offer assistance in the case of delays or deliver your passport to you.
Yours in service,
Dr. Godwin Ibe
Chairman, NIDO Russia
+79262385618
https://t.me/nido_russia/1723
#pad#visa#nin#passport
Visa/NIN/Passport Application Discount (PAD)
Everyone can finally use "PAD" to gain up to 10% discount when applying for Nigerian passport, NIN or VISA.
✅ Avoid paying twice through unofficial sources or scammers who hide behind unregistered businesses.
✅ Avoid mistakes in the application process that will cost you time, energy and money.
Other Benefits?
1. We'll guide you on all that you need to do to successful apply for passport/visa issuance or re-issuance from start to finish.
2. We'll offer you a discount on payment for passport issuance or re-issuance or Nigerian VISA application in some cases.
3. We'll guide you on other documents that you might need after getting your passport/Visa.
4. We'll guide you on travel and accommodation plans if you have to travel to Moscow from another city.
5. We'll offer assistance in the case of delays or deliver your passport to you.
Yours in service,
Dr. Godwin Ibe
Chairman, NIDO Russia
+79262385618
https://t.me/nido_russia/1723
#pad#visa#nin#passport