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• Open Tomcat Properties. If you need further details on how to do this, see: Tomcat start/ stop, open properties
• Switch to the Java tab.

• Add these lines to Java Options:

  • Check that the location of the GC (Garbage Collection) log file is correct. This should be in $JAVA_HOME\logs. In the examples below, this C:\tomcat\logs

Java 8

-Djava.awt.headless=true
-XX:+PrintGCDetails
-XX:+PrintGCDateStamps
-Xloggc:C:\tomcat9tomcat\logs\gc-%t.log
-XX:+UseGCLogFileRotation
-XX:NumberOfGCLogFiles=10
-XX:GCLogFileSize=10m

Java 11

-Djava.awt.headless=true
-Xlog:gc=debug:file=C:\tomcat9tomcat\logs\gc-%t.log:time,level,tags:filecount=10,filesize=10muptimemillis,tid

• Add the required memory sizes to Initial Memory Pool and Maximum Memory Pool; see Tomcat planning for details of estimating Tomcat's memory allocation
• Switch to the General tab to set the Startup Type. If you want to start/stop Tomcat:
  • manually, set Manual 
  • automatically when Windows starts, set Automatic.

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