To use the optimum of performance from your server there is a start-script for red5 available that does some basic settings in the JVM. It is called red5-highperf.sh. It is recommended to use that script for production and high-load scenarios.
#!/bin/bash if [ -z "$RED5_HOME" ]; then export RED5_HOME=.; fi # Previous option set export JAVA_OPTS="-Xrs -Xms512M -Xmx1024M -Xss128K -XX:NewSize=256m \ -XX:SurvivorRatio=16 -XX:MinHeapFreeRatio=20 -XX:+ExplicitGCInvokesConcurrent \ -Djava.net.preferIPv4Stack=true -Xverify:none" # start Red5 echo "Setting Hi Performance Options" exec $RED5_HOME/red5.sh >> $RED5_HOME/log/jvm.stdout 2>&1 &
You have to exclude the "-XX:+UseConcMarkSweepGC" param from the default red5-highperf.sh to make it functional! However if you are a performance expert you might also play with the values to find perfect matches for your use-case.
For a complete overview about possible arguments and their meaning see: http://www.oracle.com/technetwork/java/javase/tech/vmoptions-jsp-140102.html#PerformanceTuning