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
🚀 Unleashing the Beast! The Mercedes-AMG GLE, enhanced by Manhart, now boasts a staggering 800 horsepower and a Russian body kit. 💥
🔥 Originally, the V8 "mild-hybrid" engine produced 612 hp and 850 Nm. Manhart's custom supercharger unit and control module upgrade pushed the power output to a whopping 800 hp and 1000 Nm.
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🚗💨Manhart Unleashes 200+ Extra Horses on the Toyota Supra!🏎️✨
The stock 3.0L inline-six engine of the Toyota Supra packs a punch with 340 hp. But the tuning experts at Manhart have taken it to the next level, boosting it to an impressive 550 hp and a whopping 770 Nm of torque! ⚡️🔧
But that’s not all! The stunning coupe also features:
- Eye-catching aerodynamic body kit 🛠️
- Re-tuned suspension for enhanced performance 🏁
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🛒 Individual parts available:
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- New exhaust system: €5,050
- Body kit: €13,500
- Wheels: €3,070 per set
- Coilovers: €3,100 per set
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🚗💨Exciting News for BMW M5 Fans!💨🚗
German tuning house Manhart is set to unleash a beastly 800 horsepower from the latest BMW M5! 🔥 With their proven track record of boosting the XM crossover to an astonishing 900 hp, we can’t wait to see what they have in store for the M5!
But that's not all! The M5 and its Touring variant will also receive:
• A more aggressive body kit 🛠️
• A revamped suspension with lowered ride height 🚧
• Stunning new wheels! 🏎️✨
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🚗💥 Introducing the Manhart MHXM 900! 💥🚗
Get ready to experience the ultimate BMW XM upgrade! 🌟
🔧Power Boost: From a stock 748 hp and 1000 Nm to an astonishing 900 hp and 1200 Nm! 💪🔥
⚙️Suspension Upgrade: Featuring H&R springs for enhanced handling! 🛠️
🛞Stunning Wheels: Equipped with eye-catching 24-inch Manhart wheels! 😍
🌌Carbon Fiber Body Kit: Lightweight and aggressive styling that enhances performance! 🖤
🖌️Luxurious Interior: Finished in a sleek grey-orange scheme with leather, Alcantara, and carbon accents! ✨
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The tuning experts at Manhart have taken the iconic BMW M3 to a whole new level, surpassing the power of the new BMW M5! 🔥
🔧Engine Upgrade: Boosted by a staggering 345 hp, the total output now stands at an incredible 855 hp and 1090 Nm of torque! 💪⚙️
📈Transmission: Enhanced 8-speed automatic for smooth power delivery!
✨Other Upgrades:
• Signature carbon fiber body kit for that aggressive look 🏎️
• Adjustable dampers for a tailored ride experience 🛠️
• Carbon strut brace for increased rigidity 🔩
This specific MH3 800 Touring has already clocked 12,500 km and is up for grabs at €212,000! 💰
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