After a period of user inactivity the next render is slow and use 100% of HDD

We are having a recurrent problem around here, sometimes after a period of user inactivity in 3dsmax, when we render an interactive or normal render it takes AGES to clean, it starts using the hdd 100% for a while, we are not using out of core textures, the machines have 128gb of ram and the scene is using 63% of it according to task manager.
Is this expected ? any way to not have it behave like this ?

More info would be necessary here - Corona version, Max version, OS version (including updates, so not just “Win 11”) and CPU.

Are you saving autosaves or render history? (the settings are in Render Setup > System > System Settings) These files can take up a lot of HDD space, especially if you are rendering in high resolution with multiple render elements.

Other than that, what you are describing sounds like paging memory to the HDD, which would mean that you are running out of RAM. You are not getting the “system running low on RAM” error message?

Hi, sorry for the late response, so here are the data
Win 10 Pro Os build 19045.4780 Windows feature experience pack 1000.19060.1000.0
3dsmax 2025.3 Corona 13, amd 7950x 128gb ram
We are not using autosave or render history, NOT receiving any kind of memory error on corona, task manager shows plenty of ram available.

This sounds like a issue with windows “Working Set - Win32 apps | Microsoft Learn

Try disabling windows defender, setting power option mode to high performance and you can also go through this article and try the solution listed: https://www.wisecleaner.com/think-tank/507-3-Solutions-for-Windows-10-Standby-Memory-Issues.html

You can also try disabling Sysmain (Superfetch) by opening services (services.msc), find “Sysmain” and disable it. this prevents Windows from aggressively managing memory (If you dont see any improvement, re enable it).