Why does Silent Hill 2 stutter in Brookhaven Hospital corridors?

While navigating Brookhaven Hospital corridors, I felt obvious stuttering during character turns, with memory usage jumping violently between 12.4-15.8GB per AIDA64. I first tried increasing virtual memory to 64GB, but it didn't alleviate the stutter and actually slowed down system boot speed, leaving me confused. I then used the GamePP Resource Scheduler to force the game process priority to Realtime level. After this, memory controller load converged to 54-61% per HWiNFO, and memory temperature remained stable at 42-48℃ per AIDA64, while RTSS showed frames stabilized from 45-60fps to a smooth flow.