The following JVM Args are supported when starting the embedded server.

heapSize

You can set the max heap size the server is allowed to have (-Xmx) by passing the heapSize parameter to the start command. This parameter defaults to megabytes but you can specify any valid suffix.

start heapSize=1024

In server.json

server set JVM.heapSize=1024
server set JVM.heapSize=2G
server show JVM.heapSize

minHeapSize

You can set the starting heap size for the server (-Xms) by passing the minHeapSize parameter to the start command. This parameter defaults to megabytes but you can specify any valid suffix.

start minHeapSize=1024

In server.json

server set JVM.minHeapSize=1024
server set JVM.minHeapSize=2G
server show JVM.minHeapSize

Ad Hoc JVM Args

You can specify ad-hoc JVM args for the server with the JVMArgs parameter.

start JVMArgs="-XX:MaxGCPauseMillis\=200"

In server.json

server set JVM.args="-XX:MaxGCPauseMillis\=200"
server show JVM.args

Ad Hoc Runwar Options

You can specify ad-hoc options for the underlying Runwar library using the RunwarArgs parameter.

start RunwarArgs="--sendfile-enable false"

In server.json

server set runwar.args="--sendfile-enable false"
server show runwar.args