Hi, 

I'm was testing the project by fastapi + sqlalchemy, i write golang code 
for sending thread parallelism to the my API endpoint, I found a problem, 
in the sqlalchemy many requests fail, 

this is my config : 

SQLALCHEMY_DATABASE_URL = config("DATABASE_URL")
engine = create_engine(SQLALCHEMY_DATABASE_URL)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

I took a video of this problem,


https://drive.google.com/file/d/1rgd_GBwRQHmiv-C-26luFfESKIByQP4U/view?usp=sharing


We do not know exactly how to solve the problem. sqlalchemy must cover many 
requests connection.

Thanks,
Ramin

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