# Xms represents the initial size of total heap space
# Xmx represents the maximum size of total heap space
-Xms20g
-Xmx20g

## GC configuration
-XX:+UseConcMarkSweepGC
-XX:CMSInitiatingOccupancyFraction=75
-XX:+UseCMSInitiatingOccupancyOnly

# explicitly set the stack size
-Xss1m

## force the JVM to use IPv4 stack
-Djava.net.preferIPv4Stack=true

# pre-touch memory pages used by the JVM during initialization
-XX:+AlwaysPreTouch

# force the server VM
-server

# set to headless, just in case
-Djava.awt.headless=true

# ensure UTF-8 encoding by default (e.g. filenames)
-Dfile.encoding=UTF-8

# use our provided JNA always versus the system one
-Djna.nosys=true

# flags to configure Netty
-Dio.netty.noUnsafe=true
-Dio.netty.noKeySetOptimization=true
-Dio.netty.recycler.maxCapacityPerThread=0

# log4j 2
-Dlog4j.shutdownHookEnabled=false
-Dlog4j2.disable.jmx=true
-Dlog4j.skipJansi=true