Whichever part your script targets.

I guess I'm a bit lost here. If you deliberately overload memory, what you'll see eating up memory is the thing you used to overload it.

Bend your finger backwards till it hurts (a little bit). If you then look at your hand to figure out what's causing the pain, it'll be you bending your finger backwards. In other words, you already know the cause, because you deliberately picked it and implemented it.

I'm not seeing the benefit to this, unless what you're doing is testing some sort of monitoring tool to see if it correctly identifies the problem and says (metaphorically), "Hey, check it out, you're bending your finger backwards! You should stop doing that." On the other hand, if the monitoring software says, "Possible stubbed toe detected. Suggested handling: Amputate at hip", then you've found out something useful, and know that you can dispense with using that monitoring software.

But that doesn't seem to be what you're doing here.