How to keep worker memory after completing request?

Hi! I'm running serverless for model GAN. I want preload model in memory at the first request and reuse it on the next req without load model again (in case container/pod still remain). When I sent 2nd req, Idle had "clean up worker" and load model again.
How could I prevent "clean up worker" and keep model in memory? (in case container was not removed)