Good idea to check it with jmap. Looks like I've been worrying about nothing
$ /usr/java/default/bin/jmap -F -heap 37861 | grep -i maxheapsize
Attaching to process ID 37861, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 20.6-b01
MaxHeapSize = 10737418240 (10240.0MB)
Thanks for the help!