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
#SNX/USDT analysis :
#SNX is currently retracing towards the support zone following a recent impulsive move. It is anticipated that after a breakout from this zone, the price will retest and subsequently bounce back, resuming its bullish momentum.
TF : 1D
Entry : $2.0
Target : $3.4
SL : $1.5
#SNX/USDT analysis :
#SNX has broken and retested the support zone, and it is currently facing resistance from the 200 EMA. The price is likely to continue its bearish momentum from its current level and retest previous lows.
TF : 4H
Entry : $1.353
Target : $1.229
SL : $1.430
#SNX🐻👀
A little bit risky but will worth to try. Use SL.
Want to see more strategies for any coin? Check out CoinLegs in order to have an overview before your trades 📊
UNBELIEVABLE PROFIT OF 23,600% HAS BEEN REALIZED IN #SNX
🔀
We're made a massive 2️⃣3️⃣6️⃣🔤 profit this Trade 🤑🔥
If you had only $50 inthis single position you would've made $11,800⭐
Went from 7,910% to 23,615%—That’s an extra 15,705% profit just by holding for maximum gains🥂🔥
If you're someone who's been following our progress, but haven't yet joined the PREMIUM group, what's holding you back? You can see the consistent profits we're making on a regular basis. The only difference between you and the members who send us the positive feedback you see, is that they took action and joined the PREMIUM group.
It's business as usual - every day, like clockwork, we are in the fast lane, leaving the competition eating our dust
😮💨🪙
If you are ready to step up, send me a message and let's get started 👇
@Kevindexter✅
🔀#SNX/USDT 2,170% profit, insane move! 🤯
That’s 2️⃣1️⃣🔤 gain on your money 💰🔥
💰$50 would return $3600💸
💰$50 would return $1,085💎
💰$50 would return $1,085💎
Fast & solid results—that’s what we love the most. Any guesses on who’s missing out again? 🤔
Enjoy 2,170% profit🆙. 🤝Congratulations all Premium Members.
Now imagine if you followed the rest of the signals.. 🤑💯
chat to join
➡️@Kevindexter✅️