When the default heap size is chosen ergonomically, observe the
user's memory size limits (ulimits).
Customer scenario:
A container with capped-memory=16GBis created in a E25k domain that has 64GB of physical memory. The "capped-memory" in a zone is a soft memory limit not a hard partitioning memory limit like in LDoms. There is 'rcapd' daemon running in the background to check if a zone's processes are hitting the "capped-memory" limit. Sun's JVM by default uses 1/64th of physical memory as its initial heap size, therefore in a 64GB domain, a container will use 1GB as its default heap size. Customer desires to have other method to define a default Java heap size.

Kimberly Chang
Systems Engineer