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    <p>Yes we do profile Tomcat applications.</p> <p>Go to <code>catalina.bat</code> or <code>catalina.sh</code> and this to your <code>JAVA_OPTS</code> (I am using Tomcat 6.0.16):</p> <pre><code>-Dcom.sun.management.jmxremote=true -Dcom.sun.management.jmxremote.port=9090 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false </code></pre> <p>Your <code>JAVA_OPTS</code> should look like</p> <pre><code>set JAVA_OPTS=%JAVA_OPTS% -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.util.logging.config.file="%CATALINA_BASE%\conf\logging.properties" -Dcom.sun.management.jmxremote=true -Dcom.sun.management.jmxremote.port=9090 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false </code></pre> <p>Updated after Ryan comment that it is better to use <code>setenv.sh</code>. This is my <code>setenv.sh</code> for JDK 8. Missing few other settings but good to start with.</p> <pre><code>SUN_JVM_OPTS=" -server \ -XX:MaxMetaspaceSize=3G \ -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled \ -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=70 \ -XX:+ScavengeBeforeFullGC -XX:+CMSScavengeBeforeRemark \ -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=3 -XX:GCLogFileSize=2M \ -XX:+HeapDumpOnOutOfMemoryError \ -Dsun.net.inetaddr.ttl=60 \ -Dcom.sun.management.jmxremote \ -Dcom.sun.management.jmxremote.port=8480 \ -Dcom.sun.management.jmxremote.authenticate=false \ -Dcom.sun.management.jmxremote.ssl=false" # Set custom application options here APPLICATION_OPTS="-Dlog4j.configurationFile=patht-to-log/log4j2.xml -Dlog4j.debug=true " JVM_OPTS="$GENERAL_JVM_OPTS $SUN_JVM_OPTS" CATALINA_OPTS="$JVM_OPTS $APPLICATION_OPTS" echo "Tomcat started with settings "$CATALINA_OPTS </code></pre> <p>Once you drop the <code>setenv.sh</code> in bin directory, you can see the changes in console on startup.</p> <p>Here's another step by step tutorial to profile Tomcat applications with Visual VM: <a href="http://www.skill-guru.com/blog/2010/11/11/troubleshooting-application-performance-with-visualvm/" rel="nofollow noreferrer">Trouble shooting application performance with Visual VM</a></p>
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    1. POProfile Tomcat Application With VisualVM
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    1. COIf I follow the description on the link I can connect VisualVM to tomcat but there is no profile tab. Also, the description is not exact. It says "Click on Local or remote" but there is no such selection in VisualVM. I chose "Add JMX Connection" and specified a "localhost:9090" connection. I guess that's what they mean...
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    2. CO@Wolfgang Fixed the language
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    3. COYou should really not use JAVA_OPTS for this - you should use CATALINA_OPTS instead in a bin/setenv.sh file (you shouldn't edit catalina.sh - it already calls out to setenv.sh for you)
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