JAVA_OPTS 与 CATALINA_OPTS

JAVA_OPTS 与 CATALINA_OPTS

配置只是该Tomcat使用的环境变量，使用CATALINA_OPTS，而如果配置其他Java应用程序也要使用的环境变量，比如JBoss，在JAVA_OPTS中设置。

tomcat6的说明

rem   CATALINA_OPTS   (Optional) Java runtime options used when the "start",
rem                   or "run" command is executed.

rem   JAVA_OPTS       (Optional) Java runtime options used when the "start",
rem                   "stop", or "run" command is executed.

tomcat8的说明

rem   CATALINA_OPTS   (Optional) Java runtime options used when the "start",
rem                   "run" or "debug" command is executed.
rem                   Include here and not in JAVA_OPTS all options, that should
rem                   only be used by Tomcat itself, not by the stop process,
rem                   the version command etc.
rem                   Examples are heap size, GC logging, JMX ports etc.

rem   JAVA_OPTS       (Optional) Java runtime options used when any command
rem                   is executed.
rem                   Include here and not in CATALINA_OPTS all options, that
rem                   should be used by Tomcat and also by the stop process,
rem                   the version command etc.
rem                   Most options should go into CATALINA_OPTS.

18001进程是tomcat，只配置CATALINA_OPTS，但是读取到其它tomcat配置的JAVA_OPTS，非必要不适用JAVA_OPTS

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普通官网配置

CATALINA_OPTS="-Xms2048m -Xmx2048m -XX:ParallelGCThreads=8 -XX:PermSize=512m -XX:MaxPermSize=1024m -Xloggc:/usr/local/log/gc18001/gc18001.log -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintGCTimeStamps"

打印log
-Xloggc:/usr/local/log/gc18001/gc18001.log -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintGCTimeStamps