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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News: Renewed #Ethiopia–#Eritrea war could ignite conflict spanning 10–15 countries on three continents, trigger “Africa’s Second World War,” expert warns
A renewed war between Ethiopia and Eritrea could ignite a broader conflict involving 10–15 countries across three continents and risk becoming “#Africa’s Second World War,” a conflict expert has warned, according to a report by Anadolu Agency.
Speaking to Anadolu Agency, Kjetil Tronvoll, professor of peace and conflict studies at #Oslo New University College, said tensions between the two neighboring countries have sharply escalated and could draw in regional and international actors if fighting erupts.
The expert suggested that regional and international actors could still help prevent escalation by increasing diplomatic engagement, pressing Eritrea to end interference in Ethiopia’s internal affairs, encouraging negotiations over Ethiopia’s potential use of the port of #Assab.......
Read more: https://addisstandard.com/?p=55840
Large-scale transformation and adaptive re-use in Oslo🇳🇴
Images of the new proposal for Oslo Horizon - KLP’s high-rise hub - submitted to PBE / Oslo planning authority. The scheme seeks to transform a former post office terminal into a new gateway to Oslo central stations rail platforms, and creating a commercial multi-tenant office hub w.3500 workspaces, a hotel/ conference centre, foodcourt and cafe + over 3000 cycle parking spaces. Between tree branches in an extensive green roofscape the public can experience panoramic views of the Oslo Fjord and biodiversity in the heart of Oslo.
Oslo Horizon will be one of the Norway’s largest and most ambitious transformation projects, pioneering applications of re-use and recycling on an international scale.
Made by CF Moller Architects in collaboration with: kristin jarmund architects androdeo arkitekter.
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Norvegiya haqidagi rasmiy risolalarda yozilmagan tafsilotlar: jurnalist bank kassiri va do‘kon sotuvchilari bilan suhbatlardan tortib, Oslodagi reklama va ishonch muhitigacha o‘z tajribalarini hikoya qiladi. Qimmat narxlar, yashirin xavf va hayrat uyg‘otuvchi kundalik hayot — Lillehammer va Oslo ko‘z oldingizda jonlanadi.
https://yep.uz/uz/2025/09/norvegiya-jurnalist-nigohida-lillehammer-oslo/
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Explore Norway through a journalist’s eyes: from the Olympic city of Lillehammer to Oslo’s city hall and royal palace. Discover sports facilities, nature, museums, and the unique Norwegian lifestyle.
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