feat(asyncio): async DB layer, budget strategies, and log writer#35
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feat(asyncio): async DB layer, budget strategies, and log writer#35
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…og writer Swap synchronous psycopg2 + Session for asyncpg + AsyncSession across the entire gateway. Contended DB calls now yield to the event loop instead of blocking it. Key changes: - create_engine -> create_async_engine with configurable pool sizing - sessionmaker -> async_sessionmaker(expire_on_commit=False) - All route handlers, services, repositories converted to async DB calls - budget_strategy config: 'for_update' (default), 'cas' (lock-free), 'disabled' - log_writer_strategy config: 'single' (inline), 'batch' (background flush) - LogWriter Protocol with SingleLogWriter and BatchLogWriter implementations - DB pool tuning: db_pool_size, db_max_overflow, db_pool_timeout, db_pool_recycle - App startup uses FastAPI lifespan for async initialization - Alembic migrations remain sync (psycopg2) - New Prometheus metrics for log writer queue/batch/flush Co-Authored-By: Julian Bright <brightsparc@gmail.com>
tbille
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integration-tests
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Contributor
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@tbille looks like you didn't bring over the load testing script - I think that could still be useful, should I create a PR ? |
Contributor
Author
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@brightsparc good catch. Can you make a PR, I'll review it today |
Contributor
Here is the PR, I also noticed a small bug when re-running, so added graceful shutdown to capture all logs |
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Summary
psycopg2+Sessionto asyncasyncpg+AsyncSession. Contended DB calls now yield to the event loop instead of blocking it.budget_strategyconfig:for_update(default/legacy),cas(lock-free, recommended),disabled(skip budget checks)log_writer_strategyconfig:single(inline, default),batch(background flush for high-throughput)db_pool_size,db_max_overflow,db_pool_timeout,db_pool_recyclePorted from mozilla-ai/any-llm#1001
Co-Authored-By: Julian Bright brightsparc@gmail.com