Well..that would make sense. Where it is stopping is on the plane. The texture buffer is under prefs in carrara were most things are. Commit charge is for windows. Task manager memory management. You are looking for how much ram you are using and patterns between virtual vs real ram. Might want to check the options for tiling for that texture. Check tile and make seamless, even interpolation .  Keep in mind that you often don't need to delete items either for a render issue. Can make them invisible instead.

No need to think outside the box....
    Just make it invisible.