Hi,
The purpose of this warning seems to leave information behind to diagnose out of memory cook failure. When the engine cooks in parallel, it can more easy to run out of memory if you are processing many large assets concurrently. The system approximate the memory usage of the ‘next’ task add it to the current memory load and check if the process might goes out of memory and then it adjust the number of concurrency tasks allowed. This system is on the conservative side and memory can fluctuate immediately after getting a value… so it is a guessing game where the engine can guess wrong time to time. This warning would not affect the cook nor the game. If you don’t have OOM cook failure, you can safely ignore this warning.
I diffed AssetCompilingManager.cpp where this warning is issues between Between 5.4 and 5.5 and the files are identical. So the warning you get is likely coming from the change made to the task system in UE 5.5. The engine runs more and more in parallel and this might be the reason you are seeing this warning now.
Regards,
Patrick