There are many parameters you can tweak, for sure. Overflowing an area probably triggers an immediate GC run, and if that doesn’t free up enough space, an additional “young” region is used. You only need to specify a high enough maximum value for the total memory consumption of all generations.

One situation you can run into is if you generate and quickly drop objects faster than the GC can collect them, or rather, the process spends most of its time with GC rather than with actual program execution, then after a certain while an exception will be raised. That situation almost always indicates a bug in your program, and the exception helps to see the cause of the program stalling. Of course that behavior is also configurable.