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
⭐️#US30: Bulls Will Push Higher
It is essential that we apply multitimeframe technical analysis and there is no better example of why that is the case than the current 📈US30 chart which, if analyzed properly, clearly points in the upward direction.
#US30 SELL full Target done ☑️
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Live Indices News Today – US30, NASDAQ, NAS100 & GER40 | March 23, 2026 https://www.fxpremiere.com/live-indices-news-today-us30-nasdaq-nas100-ger40-march-23-2026/#US30
🔅US30 Will Fall! Sell!📉
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Here is our detailed technical review for 📊US30.
The market is approaching a significant resistance area 49,454.8.
Due to the fact that we see a positive bearish reaction from the underlined area, I strongly believe that sellers will manage to push the price all the way down to 47,742.6 level.
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🔅US30 Is Bullish! Buy!📈
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Here is our detailed technical review for 📊US30.
The market is testing a major horizontal structure 45,691.7.
Taking into consideration the structure & trend analysis, I believe that the market will reach 46,550.5 level soon.
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#freesignal#us30
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🔅US30 Will Grow! Long!📈
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Here is our detailed technical review for 📊US30.
The market is trading around a solid horizontal structure 48,884.2.
The above observations make me that the market will inevitably achieve 49,692.2 level.
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#freesignal#us30
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🔅US30 Is Very Bearish! Short!📉
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Here is our detailed technical review for 📊US30.
The market is trading around a solid horizontal structure 50,088.7.
The above observations make me that the market will inevitably achieve 49,623.5 level.
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#freesignal#us30
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🔅US30 Will Move Lower! Sell!📉
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Take a look at our analysis for 📊US30.
The market is approaching a significant resistance area 49,481.0.
Due to the fact that we see a positive bearish reaction from the underlined area, I strongly believe that sellers will manage to push the price all the way down to 49,076.8 level.
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#freesignal#us30
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🔅US30 Is Bearish! Sell!📉
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Here is our detailed technical review for 📊US30.
The market is on a crucial zone of supply 49,331.6.
The above-mentioned technicals clearly indicate the dominance of sellers on the market. I recommend shorting the instrument, aiming at 48,745.5 level.
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#freesignal#us30
- - - - - - - -
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❓Official Contact:@signalprovidercontact