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
Bitcoin and Ethereum ETF Outflows Report
On February 21, Bitcoin spot ETFs saw a net outflow of $62.77M, while BlackRock's ETF IBIT experienced a net inflow of $21.64M. Additionally, Ethereum spot ETFs recorded a net outflow of $8.92M. Read more here.
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Bitcoin ETFs Face Nearly $1B Outflows
Bitcoin ETFs experience record outflows nearing $1 billion. In 2023, all crypto sectors underperform compared to Bitcoin, with AI frameworks down 84%, agent projects 70%, and more. SEC acknowledges NYSE Arca's filing for Grayscale Ethereum ETF staking. Meanwhile, Bybit hackers have laundered 45,900 ETH ($113M) in 24 hours, totaling 135,000 ETH ($335M) to date, with more expected to be laundered soon.
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Crypto Outflows Reach $508M Amid Caution
Digital asset investment products experienced significant outflows of $508 million as investors react cautiously to uncertainties following the US Presidential inauguration. Influencing factors include market volatility surrounding trade tariffs, inflation, and monetary policy adjustments.
Read more: Unfolded
#Crypto#Investment#USPolitics#MarketVolatility#Inflation#MonetaryPolicy#DigitalAssets#DeFi#Ethereum#Trading#Finance#Economics#Outflows#Blockchain#Investors#Caution#RiskManagement#CryptoNews#MarketTrends#AssetManagement
Crypto Market Faces Severe Downturn
1️⃣ BTC inflow to exchanges hits annual high amidst panic. Price dropped below $90,000, triggering massive sell-offs.
2️⃣ Fear & Greed Index plunges to extreme fear (25), signaling anxiety in crypto markets.
3️⃣ BTC holders recorded losses of $1.73 billion, marking the highest since August 2024.
4️⃣ ETF funds faced major outflows totaling $1.01 billion, a record since launch.
5️⃣ Meme coins like Dogecoin and Shiba Inu drop significantly, as market saturation affects their traction.
6️⃣ New AI-meme project MIND of Pepe raises $6.8 million, distinguishing itself with functional AI integration.
7️⃣ Ethereum Foundation pledges $1.25 million for legal defense of Tornado Cash developer.
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