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
⚖️🗳️ALABAMA GOP RACES TO REDRAW HOUSE MAPS BEFORE 2026
🔹 Special session passes bills for NEW House primaries if courts approve GOP maps 📋⚡
🔹 Target: Flip Democratic Rep. Shomari Figures' AL-02 seat back to Republican 🔄
🔹 Would pack Black voters into fewer districts despite 27% of state population 👥
🔹 Gov. Kay Ivey: "Alabama stands ready to quickly act" on favorable rulings 🏛️
Democrats call it a "power grab echoing Jim Crow" — but GOP says Alabama's Republican tilt should match its maps! 11th Circuit decision could flip House control! ⚖️🔥🇺🇸
#Alabama#Redistricting#VotingRights
@america
📰 Trump’s War Is Now a Midterm Liability
Republicans are watching the Iran war and the redistricting mess turn into the same political problem: a president who promised control and delivered chaos.
Bloomberg reports that party operatives are openly blaming Trump’s political team after Virginia’s map fight backfired and the war pushed gas prices higher, making the usual economy-first message much harder to sell.
That is why the panic is spreading. If the House looks lost, the Senate looks shaky, and the party’s best redistricting gambit ends up helping Democrats instead, then the whole 2026 strategy starts to look like an own goal in expensive shoes.
The irony is brutal. Trump spent months demanding tougher maps, punishing holdouts, and trying to turn politics into a shank-proof machine, but the result is more donor money burned, more infighting, and more Republicans muttering that “Blairy-mandering” blew up in their faces.
The Iran war makes it worse because it attacks the one issue Republicans wanted to own: affordability.
Gas prices are up, voters are unhappy, and the president keeps drifting into side quests about granite pavers and pet projects while his party tries to explain why the Middle East is suddenly part of the domestic economy.
So the midterm story is no longer just redistricting or just war. It is the same pattern in both places: Trump turns everything into leverage, and then the leverage turns into drag.
#Trump#Republicans#midterms#Iran#redistricting#politics
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