What are the main challenges that can arise under high load on an application developed with FastAPI?

Under high load on an application developed with FastAPI, the following main challenges may arise:

• Resource limitations: FastAPI itself is asynchronous and fast, but if the server or database cannot handle the load, it will lead to delays.
• Blocking operations: If there are synchronous or blocking calls in the code (e.g., heavy computations or synchronous database requests), it can slow down request processing.
• Database connection management: With a large number of concurrent requests, it is important to properly configure the connection pool; otherwise, timeouts or errors may occur.
• Load balancing and scaling: As the load increases, horizontal scaling and the use of load balancers may be necessary.
• Monitoring and logging: Without proper monitoring, it is difficult to quickly identify bottlenecks and errors.

To address these issues, it is recommended to use asynchronous database drivers, optimize code, apply caching, and also use monitoring and scaling tools.