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Graph Rag Api Doc - GRAD

Quick start

  1. Add new repository to GRAD
uv run autods/grad/grad.py add https://github.com/owner/repo_name
  1. Ask repository using GRAD
uv run autods/grad/grad.py ask https://github.com/owner/repo_name "How to use LightAutoML library?"

Troubleshooting

Too many open files (os error 24)

If you encounter an error like:

LanceError(IO): Too many open files (os error 24)

This is a macOS/Linux file descriptor limit issue. LanceDB (the vector database) opens many files for its index, which can exceed the default system limit.

Quick fix - increase the limit for your current terminal session:

ulimit -n 10240

Permanent fix - add to your ~/.zshrc or ~/.bashrc:

ulimit -n 10240

To check your current limits:

ulimit -n        # Current soft limit (often 256 on macOS)
ulimit -Hn       # Hard limit (max you can set)

Buffer manager exception: Unable to allocate memory

If you encounter an error like:

Buffer manager exception: Unable to allocate memory! The buffer pool is full and no memory could be freed!

This is a Kuzu graph database buffer pool limit issue. The buffer pool may fill up during concurrent graph operations.

Option 1: Clear Cognee data (try first):

rm -rf .venv/lib/python3.12/site-packages/cognee/.cognee_system/

Option 2: Increase Kuzu buffer pool size (if Option 1 doesn't help):

Edit .venv/lib/python3.12/site-packages/cognee/infrastructure/databases/graph/kuzu/adapter.py and change all occurrences of buffer pool settings:

# Change from:
buffer_pool_size=2048 * 1024 * 1024,  # 2GB
max_db_size=4096 * 1024 * 1024,       # 4GB

# To:
buffer_pool_size=8 * 1024 * 1024 * 1024,  # 8GB
max_db_size=16 * 1024 * 1024 * 1024,   # 16GB

Note: This change will be lost if you reinstall/update Cognee.