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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Tigray Communication Affairs Bureau has dismissed circulating reports that the federal government has released #budget allocations for the #salaries of public servants in Tigray, describing the claims as “baseless” and “intended to mislead the public.”
In a statement issued on 29 March, the Bureau said no such funds have been received to date, citing information from the regional Bureau of Finance and Resource Mobilization.
“The information being disseminated is completely false,” the statement said, warning that the reports are designed to create mistrust between the regional administration and civil servants.
The Bureau’s statement comes amid continued uncertainty over the restoration of federal budgetary support to Tigray which was blocked since October 2025.
Read more: https://addisstandard.com/?p=56184
News: Teachers, students in #Tigray protest federal #salary suspension, call for international pressure
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The demonstrations, which drew thousands of teachers and students, underscored a deepening humanitarian and education crisis in the regional. Regional authorities say the federal government has halted salary payments for teachers since October 2025, a move they argue violates constitutional provisions and international legal obligations.
#Amanuel_Assefa, Vice President of the Tigrai Interim Administration, told protesters that the suspension of budgets and salaries is a deliberate effort
Read more: https://addisstandard.com/?p=56054