Not sure if it makes a difference or if anyone cares, but even with all the memory limits left commented out in the product.conf files, the 19.2 Xmx setting (java.memory.heap.max) is about 2.5 times the 19.1 value:
19.2 (using jdk1.8.0_221):
19.1 (using jdk1.8.0_221):
