/etc/alternatives/jre/bin/java -Dlog4j.configurationFile=/opt/openfire/lib/log4j2.xml -Dlog4j2.formatMsgNoLookups=true -server -DopenfireHome=/opt/openfire -Dopenfire.lib.dir=/opt/openfire/lib -classpath /opt/openfire/lib/startup.jar -jar /opt/openfire/lib/startup.jar
for this command my server is using 80% cpu