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
After falling from the support level of $500.0, #BinanceCoin reached the support level of $400.0 and recovered and is now trading above both levels.
As you can see in the chart, a dynamic resistance still prevents #BNBUSDT growth, so in the first step, crossing and breaking this resistance can be a sign of the continuation of the upward trend in the daily time frame.
So far, BNBUSDT has hit the dynamic resistance 2 times and failed to break it, these collisions may reach up to 5 times and then the price will start to grow. The current price movement scenario is between the $400.0 support and the dynamic resistance.
Easily earn a small income, Tencent PP Ranch Golden Egg Picking Guide!
Dear QQ Ranch friends, today, we are going to share how to easily make money in Tencent PP Ranch by picking up golden eggs! Just a few steps to make your virtual farm more abundant, earn money now!
————————
📚 1. Understand how to get golden eggs
First of all, golden eggs are a rare resource in QQ Ranch, which are picked up by participating in daily activities, completing tasks or within a specific time period. Remember to go online regularly to ensure that you don’t miss them!
📚 2. Improve the efficiency of picking eggs
⦁ Reasonable time arrangement: Choose the peak period of popularity to enter the game, and the chance of getting golden eggs is greater.
⦁ Add friends: help other players and share the experience and skills of picking eggs.
📚 3. Trade with golden eggs
The golden eggs you pick up can be sold through the in-game trading system to get game coins or other rewards. Pay attention to market trends, choose the best time to make a move, and maximize your profits!
📚 4. Participate in activities to get more rewards
Regularly participate in various activities of Tencent PP Ranch, and there will often be extra golden egg rewards to increase your small treasury. Pay attention to game announcements and participate in time!
📚 5. Continue to invest and enjoy the fun
Persist in going online every day, enjoy the fun of picking golden eggs, accumulate wealth, and make more like-minded friends.
————————
Come and pick up golden eggs at Tencent PP Ranch and earn your wealth! Perseverance, simple earning, and a promising future! 🎉
If you have other successful experiences in picking golden eggs, please share them in the comment area! I wish you all a happy game and full profits!
https://t.me/TencentPPRanch_bot/ppp?startapp=477789
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