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
✨ ADC International Youth Summit 2026 ✨
We are excited to share some of the brightest moments from one of the most large-scale and inspiring events of the year — ADC International Youth Summit 2026!
This summit brought together active and ambitious youth, leaders, speakers, and experts from different countries. Throughout these productive days, participants exchanged ideas, gained new knowledge, built valuable connections, and took important steps toward their future.
We are proud of every participant and grateful to everyone who became part of this incredible event!
#ADC#YouthSummit2026#InternationalSummit#Leadership#Education#FutureLeaders
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✨ ADC International Youth Summit 2026 ✨
Biz yilning eng yirik va ilhomlantiruvchi tadbirlaridan biri — ADC International Youth Summit 2026’dan yorqin lahzalarni siz bilan baham ko‘rishdan mamnunmiz!
Ushbu sammit turli mamlakatlardan kelgan faol va ambitsiyali yoshlar, liderlar, spikerlar hamda ekspertlarni birlashtirdi. Mazmunli kunlar davomida ishtirokchilar fikr almashdilar, yangi bilimlarga ega bo‘ldilar, yangi tanishuvlar orttirdilar va o‘z kelajagi sari muhim qadamlar qo‘ydilar.
Har bir ishtirokchi bilan faxrlanamiz va ushbu tadbirning bir qismi bo‘lgan barchaga minnatdorchilik bildiramiz!
#ADC#YouthSummit2026#InternationalSummit#Leadership#Education#FutureLeaders
📞 742261078
📲 Telegram: @admofadc
✨ ADC International Youth Summit 2026 ✨
We are excited to share some of the brightest moments from one of the most large-scale and inspiring events of the year — ADC International Youth Summit 2026!
This summit brought together active and ambitious youth, leaders, speakers, and experts from different countries. Throughout these productive days, participants exchanged ideas, gained new knowledge, built valuable connections, and took important steps toward their future.
We are proud of every participant and grateful to everyone who became part of this incredible event!
#ADC#YouthSummit2026#InternationalSummit#Leadership#Education#FutureLeaders
📞 742261078
📲 Telegram: @admofadc
✨ ADC International Youth Summit 2026 ✨
Мы рады поделиться яркими моментами с одного из самых масштабных и вдохновляющих событий этого года — ADC International Youth Summit 2026!
Этот саммит объединил активную и амбициозную молодежь, лидеров, спикеров и экспертов из разных стран. В течение насыщенных дней участники обменивались идеями, получали новые знания, находили единомышленников и делали важные шаги к своему будущему.
Мы гордимся каждым участником и благодарим всех, кто стал частью этого события!
#ADC#YouthSummit2026#InternationalSummit#Leadership#Education#FutureLeaders
📞 742261078
📲 Telegram: @admofadc
✨ ADC International Youth Summit 2026 ✨
Biz yilning eng yirik va ilhomlantiruvchi tadbirlaridan biri — ADC International Youth Summit 2026’dan yorqin lahzalarni siz bilan baham ko‘rishdan mamnunmiz!
Ushbu sammit turli mamlakatlardan kelgan faol va ambitsiyali yoshlar, liderlar, spikerlar hamda ekspertlarni birlashtirdi. Mazmunli kunlar davomida ishtirokchilar fikr almashdilar, yangi bilimlarga ega bo‘ldilar, yangi tanishuvlar orttirdilar va o‘z kelajagi sari muhim qadamlar qo‘ydilar.
Har bir ishtirokchi bilan faxrlanamiz va ushbu tadbirning bir qismi bo‘lgan barchaga minnatdorchilik bildiramiz!
#ADC#YouthSummit2026#InternationalSummit#Leadership#Education#FutureLeaders
📞 742261078
📲 Telegram: @admofadc
🌟 ADC International Youth Summit 2026
Yilning eng yirik va ilhomlantiruvchi tadbirlaridan biri — ADC Xalqaro Yoshlar Sammiti o‘z yakuniga yetdi!🌍✨
Ushbu sammit turli mamlakatlardan kelgan eng faol yoshlar, yetakchilar va ekspertlarni bir nuqtada birlashtirdi. Ishtirokchilar tajriba almashishdi, yangi bilimlar olishdi va kelajak sari muhim qadam tashlashdi. Biz har bir ishtirokchi bilan faxrlanamiz!
✨ADC International Youth Summit 2026✨
We are excited to share some of the brightest moments from one of the most large-scale and inspiring events of the year — ADC International Youth Summit 2026!
This summit brought together active and ambitious youth, leaders, speakers, and experts from different countries. Throughout these productive days, participants exchanged ideas, gained new knowledge, built valuable connections, and took important steps toward their future.
We are proud of every participant and grateful to everyone who became part of this incredible event!
#ADC#YouthSummit2026#InternationalSummit#Leadership#Education#FutureLeaders#YoshlarSammati
📞 742261078
📲 Telegram: @admofadc
🌟 ADC International Youth Summit 2026
Yilning eng yirik va ilhomlantiruvchi tadbirlaridan biri — ADC Xalqaro Yoshlar Sammati o‘z yakuniga yetdi!🌍✨
Ushbu sammit turli mamlakatlardan kelgan eng faol yoshlar, yetakchilar va ekspertlarni bir nuqtada birlashtirdi. Ishtirokchilar tajriba almashishdi, yangi bilimlar olishdi va kelajak sari muhim qadam tashlashdi. Biz har bir ishtirokchi bilan faxrlanamiz!
✨ADC International Youth Summit 2026✨
We are excited to share some of the brightest moments from one of the most large-scale and inspiring events of the year — ADC International Youth Summit 2026!
This summit brought together active and ambitious youth, leaders, speakers, and experts from different countries. Throughout these productive days, participants exchanged ideas, gained new knowledge, built valuable connections, and took important steps toward their future.
We are proud of every participant and grateful to everyone who became part of this incredible event!
#ADC#YouthSummit2026#InternationalSummit#Leadership#Education#FutureLeaders#YoshlarSammati
📞 742261078
📲 Telegram: @admofadc