15.6 GiB. Sizes use
binary units (1 GiB = 1024 MiB).
The information is read on the node itself: PowerShell on Windows, /proc/meminfo
on Linux, and sysctl on macOS. On other systems, or if the lookup fails, the value
reported by the Java virtual machine is used, or N/A if that is unavailable.
On Linux the value is the memory the kernel can use, which is slightly less than the installed amount. Inside a container, the value reported by the JVM may be the container limit.