I encountered a problem where, after packaging a project containing only StartContent using version 5.5 and running it with LLM (Low-Level Memory) debugging, I observed a stepwise increase in RHIMisc memory usage, as shown in the attached image.
The red line representing RHIMisc growth on the horizontal axis (time in seconds) has reached 8000s, clearly demonstrating exponential growth.
This issue does not occur in version 5.4. After investigation, I found that it is caused by the default enablement of Hardware Raytracing in 5.5. When I manually enabled Hardware Raytracing in 5.4, the same problem occurred, and this behavior was consistent across multiple machines.
I find it puzzling because Hardware Raytracing shouldn’t have such an obvious issue, especially since I haven’t made any other modifications. Has anyone else experienced this problem? The end result is that after running the game for an extended period (over 12 hours), the virtual memory accumulates nearly 10GB of growth.