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This guide details how to install the Perfmon4j agent into an Tomcat 7.0.x application server under running on Linux. The instructions require perfomn4j 1.2.0-RC_2 or later.

Copy files

Copy the following files from your perfmon4j distribution:

  • Create an apache-tomcat/lib/endorsed folder.
  • Copy the perfmon4.jar file into apache-tomcat/lib/endorsed folder.
  • Copy the javassist.jar file into apache-tomcat/lib/endorsed folder.
  • Copy the perfmon4-servlet.jar file into apache-tomcat/lib folder.
  • Copy the perfmon4-tomcat7.jar file into apache-tomcat/lib folder.
  • Copy the perfmonconfig.xml (located in the pefmon4j/doc folder of the perfmon4j distribution) file into apache-tomcat/conf folder.


Set the following environment variable:

export CATALINA_OPTS="-javaagent:../lib/endorsed/perfmon4j.jar=-eorg.apache,-eSQL,-eVALVE,-f../conf/perfmonconfig.xml"
Details on javaagent command line parameters.
export JAVA_ENDORSED_DIRS="-Djava.endorsed.dirs=../lib/endorsed"


  • Start tomcat using apache-tomcat/bin/ run shell script.
  • You should see Perfmon4j ascii art when the agent is launched.
  • Once the server is started you should see something that looks like the following:

Max Active Threads. 0 
Throughput......... 0.00 per minute
Average Duration... 0.00
Median Duration.... NA
> 2 seconds........ 0.00%
> 5 seconds........ 0.00%
> 10 seconds....... 0.00%
Standard Deviation. 0.00
Max Duration....... 0 
Min Duration....... 0 
Total Hits......... 0
Total Completions.. 0
(SQL)Avg. Duration. 0.00
(SQL)Std. Dev...... 0.00
(SQL)Max Duration.. 0 
(SQL)Min Duration.. 0 

This indicates that perfmon4j is monitoring each web request. Go into the apache-tomcat console http://localhost:8080 and navigate through the demo applications. Each minute a summary will be displayed showing this throughput information.