Tomcat启动参数修改

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CATALINA_OPTS="-server -Xms1024M -Xmx4096M  -XX:PermSize=128M -XX:MaxPermSize=256M -XX:+HeapDumpOnOutOfMemoryError -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:HeapDumpPath=$CATALINA_BASE/log/heap.hprof  -Dproject=gameserver -Djava.rmi.server.hostname=ip -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=port -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -verbose:gc -XX:+PrintGCTimeStamps -XX:+PrintGCDetails -Xloggc:$CATALINA_BASE/log/gc.log -XX:ErrorFile=$CATALINA_BASE/log/java_error_%p.log  -XX:OnError=\"pmap %p\" -XX:OnError=\"gcore %p\" -Xcheck:jni"

1、位置最好在执行前
# ----- Execute The Requested Command -----------------------------------------
这样可以保证里面的属性，如CATALINA_BASE 能正确获得

2、 不能使用JAVA_OPTS，下面是二者区别
#   JAVA_OPTS       (Optional) Java runtime options used when any command
#                   is executed.
#                   Include here and not in CATALINA_OPTS all options, that
#                   should be used by Tomcat and also by the stop process,
#                   the version command etc.
#                   Most options should go into CATALINA_OPTS.
#   CATALINA_OPTS   (Optional) Java runtime options used when the "start",
#                   "run" or "debug" command is executed.
#                   Include here and not in JAVA_OPTS all options, that should
#                   only be used by Tomcat itself, not by the stop process,
#                   the version command etc.
#                   Examples are heap size, GC logging, JMX ports etc.
使用JAVA_OPTS关服的时候会抛出异常：
Error: Exception thrown by the agent : java.rmi.server.ExportException: Port already in use: portNum; nested exception is:
        java.net.BindException: Address already in use