Something is wrong with the editor? ¿Or not? (UE5.6)

[Ivan3z]

I spent a couple of hours editing materials and particle systems.
When I finish the job I see that there is a lot of memory allocated, and a lot of objects.
Normally my project uses about 5 GB of memory.
The frame rate is also incredibly low (The normal on my machine is 160FPS).

(All windows closed, Ouliner closed, details closed, empty map, only the viewport, no playing)

I know if I restart the editor everything will go back to normal.

But I want to share some screenshots in case anyone know tell me what’s going on.

Memory:

Game:

Thank you so much!!

[Ivan3z]

I found out the problem is caused by the Niagara editor.
After close it the memory is not free and the FPS drop and never get up again.