Locate plugin files in the ${NGRINDER_HOME}/plugins folder to activate the plugins.

JVM Monitor Plugin

JVM Monitor Plugin connects to the JMX port(By default the port is 5000) in the remote server which is specified in the target host fields in the perf test configuration page, and collects the count of full and minor GC and size of Heap and PermGen memory area, and the thread count.

You can set the port by specifing the following configuration in system.conf.

plugin.jvm_monitor.port=PORT_YOU_WANT

If you want to connect the Tomcat, you can activate JMX on Tomcat by providing the CATALIA_OPTS.

set CATALINA_OPTS=-Dcom.sun.management.jmxremote  -Dcom.sun.management.jmxremote.port=PORT_YOU_WANT -Dcom.sun.management.jmxremote.ssl=false   -Dcom.sun.management.jmxremote.authenticate=false

Network Overflow Plugin

Network Overflow Plugin watches the agent's network usage and stop the test if the too much traffics are used. This plugin is useful if you can not make sure the test traffic does not harm the network stability.

You can set the maxmimum allowed traffic by specifying the followings in the system.conf

• If you want to set the maximum byte allowed in each test. Please specify the following. plugin.networkoverflow.pertest.limit=MAX_MEGA_BYTE_PER_SECOND_ALLOWED If you provide 128 here, a test can make less than 128MB/s traffic.

• If you want to set the maximum byte allowed for all tests in a region. Please specify the following. plugin.networkoverflow.limit=MAX_MEGA_BYTE_PER_SECOND_ALLOWED If you provide 128 here, total traffic less than 128MB/s is only allowed.