This environment variable sets heap space and other memory-related JVM options. If not set, the launcher calculates a reasonable default: a heap size of 75% of the host machine's total memory, plus 0.25 GB of off-heap memory per core.

You can set this variable directly to override all defaults, or use the following variables to customize the calculated defaults:

Setting this variable manually also disables the automatic heap dump configuration (-XX:+HeapDumpOnOutOfMemoryError).