performance-testingload-testingtsung

Tsung - Maximum number of concurrent users in a single VM reached

I am new to tsung performance test. I have installed Tsung in Mac OS X using brew. After many tries and resolving few other issues, I am struck with the below error, and I do not find a proper solution elsewhere.

I am facing the below error:

"Maximum number of concurrent users in a single VM reached and 'use_controller_vm' is true, can't start new beam !!! Check 'maxusers' value in configuration.~n"

The command I used to run is:

tsung -f test_performance.xml start -r ssh_no_check

where ssh_no_check is:

#!/bin/sh
/usr/bin/ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no $@

and test_performance.xml is: 

<?xml version="2.0"?>   
<!DOCTYPE tsung SYSTEM "/path_to_tsung/tsung-1.0.dtd">
   <tsung loglevel="warning">
  <clients>
      <client host="localhost" use_controller_vm="true" maxusers="100"/>
   </clients>
   <servers>
      <server host="server_ip" port="port_num" type="tcp"/>
   </servers>
   <load>
      <arrivalphase phase="1" duration="60" unit="second">
         <users arrivalrate="300" unit="second"/>
      </arrivalphase>
    </load>
   <sessions>
        <session name="es_load" weight="1" type="ts_http">
        <transaction name="transaction_name">
             <request>

                <http url="url_path" contents="request_body" content_type="application/json" method="POST">
                    <http_header name="header0" value="value0"/>
                    <http_header name="header1" value="value2"/>
                </http>

            </request>
      </transaction>
    </session>
   </sessions>
 </tsung>

NOTE: In the above config xml, I have changed the server's host, port, http url, and headers values for safety & privacy.

Please help me in resolving this problem.

Solution

  • Your xml needs a bit of change:

    In your client tag, you have mentioned the maxusers as 100.

    But in users arrival rate you have configured as 300. Change it to 10, it will work for you.

    Extra point, if you want to generate report, just run the tsung_stats.pl command in the folder where the logs gets created, it will provide you a beautiful html report :)