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
#german
🆕B2 uchun tezkor nemis tili kursi!
🇩🇪
3 oy ichida B2 sertifikatiga tayyorlaning!
📌Darslar: Haftada 3 marta, har biri 3 soat
📌Davomiyligi:Apreldan boshlab 3 oy
📌Qo‘shimcha:Prüfungstraining (imtihon tayyorgarligi)
📌Format: Online
📌Kimlar uchun: Tezda B2 sertifikat olishni maqsad qilganlar uchun
📚Bizda imtihon talablariga mos holda, intensiv o‘qitish tizimi asosida o‘qishingiz mumkin.
‼️Eslatma: B1 darajani tugatganlar qabul qilinadi!
✈️Qo‘shimcha ma’lumot va ro‘yxatdan o‘tish uchun biz bilan bog‘laning: @mittelpunktmanager
✅Mittelpunkt|Dein Weg zur Entwicklung
#german
🆕B2 uchun tezkor nemis tili kursi!
🇩🇪
3 oy ichida B2 sertifikatiga tayyorlaning!
📌Darslar: Haftada 3 marta, har biri 3 soat
📌Davomiyligi:Apreldan boshlab 3 oy
📌Qo‘shimcha:Prüfungstraining (imtihon tayyorgarligi)
📌Format: Online
📌Kimlar uchun: Tezda B2 sertifikat olishni maqsad qilganlar uchun
📚Bizda imtihon talablariga mos holda, intensiv o‘qitish tizimi asosida o‘qishingiz mumkin.
‼️Eslatma: B1 darajani tugatganlar qabul qilinadi!
✈️Qo‘shimcha ma’lumot va ro‘yxatdan o‘tish uchun biz bilan bog‘laning: @mittelpunktmanager
✅Mittelpunkt|Dein Weg zur Entwicklung
‘Skilfully’ negotiating #Iran is ‘humiliating’ #US, #German Chancellor warns; says Washington lacks ‘strategic exit’
Addis Abeba – German Chancellor Friedrich Merz has warned that Iran is “humiliating” the United States through “skilful” negotiating, while questioning Washington’s lack of a clear exit strategy in the ongoing war.
Speaking in Marsberg, Merz said Iran appeared stronger than expected and accused the US of lacking direction. “The Iranians are clearly stronger than expected and the Americans clearly have no truly convincing strategy in the negotiations either,” he said, according to Deutsche Welle (DW).
He added that Tehran was negotiating “very skillfully — or very skillfully not negotiating,” warning that: “At the moment, I do not see what strategic exit the Americans will choose.”
https://www.facebook.com/share/1CSxphCpmn/?mibextid=wwXIfr
訊息:
Germany to soon resume coordination w/ UNWRA after Israel failed to provide evidence on its allegations against the agency’s employees
#German
#Zionism
#palestina
#Folk#German
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It speaks about camaraderie, hard work and the joy to drink away your hard life, then go back to working hard without knowing for how long but never alone as friends stand with us during tough times just waiting to drink again between friends.
It is the spirit of the working men, to stand through hard work and tough times, to help eachother out and wait for the day where you can drink and feast togethers.
https://youtu.be/gh3Y_jtDADo
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