They can't write concurrently, but generally speaking yes, they can: https://sqlite.org/faq.html#q5 https://sqlite.org/faq.html#q5 Your throughput will be much

They can't write concurrently, but generally speaking yes, they can: https://sqlite.org/faq.html#q5 https://sqlite.org/faq.html#q5 Your throughput will be much worse than a single process, but it's possible, and sometimes convenient. Maybe something in your stack is trying to hold open a writable connection in both processes?