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
🚗💨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 🏁
- New wheels for that perfect look! 🖤
🛒 Individual parts available:
- Engine upgrade: €11,999
- New exhaust system: €5,050
- Body kit: €13,500
- Wheels: €3,070 per set
- Coilovers: €3,100 per set
#Manhart#ToyotaSupra#Tuning#CarEnthusiast#PerformanceUpgrade#CarLovers#Auto
🚗✨ Introducing the updated Volvo XC90! ✨🚗
After nearly a decade, the XC90 has received a stunning makeover with a refreshed exterior featuring new headlights, grille, and bumpers. Plus, enjoy an enhanced suspension and a modern media system with a larger screen! 📱🔊
This new XC90 will only be available with hybrid powertrains based on gasoline engines, as the company has phased out diesel options. ⚡️🚫
🔋 The plug-in hybrid XC90 offers an impressive electric range of about 70 km, with a total driving range of 800 km! Meanwhile, mild-hybrid versions with a 48-volt starter-generator reduce fuel consumption by 15%. 🌍💚
#VolvoXC90#Hybrid#Sustainability#Innovation#CarLovers#NewRelease#Auto
🚗💨 Exciting News from Dodge! 💨🚗
Introducing the new 3.0L Hurricane Inline-Six Engine!🌪️✨
Available in two powerful options:
- 🔥 426 hp for just $10,495
- ⚡️ 558 hp for $13,745
And that's not all! A third variant boasting around 1000 hp is on the way! 🚀💯
These engines are set to replace the legendary V8 HEMI. Get ready for a thrilling ride! 🏁🔥
#Dodge#HurricaneEngine#Power#Innovation#V8HEMI#CarLovers#Automotive
🚗💨Ferrari Unveils the F80: A New Super Hybrid Rivaling McLaren W1!💨🚗
Introducing the most powerful road model in Ferrari's history! 🔥🏎️
🔴 Instead of a V12, it features a Le Mans-inspired V6 3.0 with hybrid technology.
🔴 Produces a staggering 900 hp, revving up to 9000 RPM!
🔴 Combined output with electric motors (developed by Ferrari) reaches an astonishing 1200 hp!
🔴 0-100 km/h in just 2.15 seconds!
🔴 0-200 km/h in only 5.75 seconds!
🔴 Top speed of 350 km/h!
🔴 800-volt electrical architecture for ultimate performance!
🔴 Dry weight of 1525 kg!
🔴 Monocoque made from carbon fiber, with aluminum front and rear subframes!
The F80 features a two-seat configuration, with a driver-focused cockpit, dubbed "1+." 🏁👤
Its retro design pays homage to the legendary Daytona and F40, generating a whopping ton of downforce at 250 km/h! 🌬️✨
🚀Availability: Late 2025
💰Starting Price: €3.6 million
🔢 Only 799 units will be produced!
#FerrariF80#SuperHybrid#Hypercar#Ferrari#McLarenW1#CarLovers#Auto
When you want your car to be as cozy as your living room 🛋️🚗
#Satisfying#Transformation#DIY#Craftsmanship#UniqueRides#CarLovers#ViralVideo#Reels#FacebookWatch#AmazingCars
Full video 👇
https://www.facebook.com/share/r/1Dg1M4jKCs/
🚗💨 Introducing the all-new Brabus Mercedes-AMG S-Class! 🌟
This stunning beast boasts a jaw-dropping 1000 horsepower and a mind-blowing 1820 Nm of torque! 🔥💪
🔧 Under the hood, the 4.5-liter V8 has been meticulously upgraded with a custom turbo system, new pistons, and a fresh ECU tune. Get ready for an exhilarating driving experience! 🏎️💨
✨ The exterior features aggressive carbon aerodynamic elements and is finished in a unique shade of grey, perfectly complemented by 22-inch forged wheels. 😍🖤
🛋️ Inside, luxury meets style with exquisite grey quilted leather upholstery that takes comfort to the next level.
#Brabus#MercedesAMG#SClass#LuxuryCars#CarEnthusiast#1000HP#Performance#AutomotiveDesign#CarLovers#Auto🚘✨
🚀Yangwang U9 Sets New Record!🚀
The incredible Yangwang U9 by BYD has reached a jaw-dropping speed of 391.94 km/h! 🏎️💨 This marks a new record for Chinese cars, surpassing its previous achievement by 17 km/h and far exceeding its official top speed of 309 km/h.
To achieve this feat, the 1306-horsepower hypercar underwent significant upgrades, including enhanced aerodynamics, lightweight wheels with track tires, and a software reprogramming. 🔧✨
#YangwangU9#BYD#Hypercar#SpeedRecord#AutomotiveInnovation#CarLovers#Performance#ChineseAutomobile#Auto
🚗💨 Introducing the Naran Hypercar: The Ultimate Powerhouse! 🌟
Get ready for the unveiling of the Naran Hypercar in the UK this August! 🇬🇧 With a staggering 1000 horsepower, this beast promises to be the fastest four-seater car in the world, powered by a traditional internal combustion engine—no electric enhancements! ⚡️❌
Only 39 units will be produced, making it an exclusive masterpiece! 🎨✨
Under the hood, it features a 5.0-liter twin-turbo V8, derived from BMW's impressive 4.4-liter engine. 🏎️💥 And yes, it comes with full-wheel drive for that ultimate driving experience! 🌍🚀
#NaranHypercar#CarEnthusiasts#AutomotiveExcellence#V8Power#Hypercar#FastestCar#LuxuryCars#CarLovers#InnovativeEngineering
🚗✨ Introducing the all-new AC Cobra GT Coupe! 🌟
For the first time in history, this iconic sports car is getting a hardtop version, and it's set to be produced in series! 🏁💨
With stunning carbon body panels, the Coupe is not only beautiful but also powerful! 💪🔥 Choose between two roaring V8 engines: 565 or 730 horsepower!
Starting at just £325,000, this masterpiece is ready to hit the roads! 💷🚀
#ACCobra#SportsCar#CarEnthusiast#LuxuryAutomobile#V8Power#CobraGT#CarLovers#IconicDesign#AutomotiveExcellence