Overview

Uvicorn 0.30, released on May 28, 2024, introduces a new multiprocess manager replacing the old worker system.

Main Features

New multiprocess manager

The new multiprocess manager improves worker handling with more reliable restarts, better connection distribution, and optimized graceful shutdown.

python 
import uvicorn

# Using the new multiprocess manager
uvicorn.run(
    'app:app',
    host='0.0.0.0',
    port=8000,
    workers=4,  # new multiprocess manager
)

Sources