Engineering Field Notes
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Deep dives into complex system design challenges, architectural decision records (ADRs), and optimized code structures.
system_architecture.md
FastAPIPostgreSQLThreading
The Problem
High-throughput APIs often face race conditions and SSL socket collisions when multiple async threads attempt to use a shared database client.
The Architecture Solution
Implemented isolated database client dependency injection at the request level, ensuring each thread maintains a dedicated, thread-safe connection pool.
Implementation Logic
def get_db_session():
# Isolated connection pool per request
db = SessionLocal()
try:
yield db
finally:
db.close()