ColdFusion Out Of Memory

I wanted to get technical input on something related to our ColdFusion setup. We’ve configured 20 ColdFusion instances on one server, and each instance has a Java max heap size of 4500 MB. Now, let’s say each of these instances tries to generate a PDF file that’s around 5000 MB—so larger than the configured heap size. Would this scenario lead to an out-of-memory issue? Just to add, the host machine has 93 GB of RAM. Appreciate your thoughts on this!