Ultimate Thread Group in Jmeter

Reference

testingjournals

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What it is

A standard Thread Group gives us a platform to setup configuration related to your performance test execution. But, suppose you wish to perform load test for 500 virtual users where in single execution different User slots(250, 100, 150) follow separate Ramp-up Time(Startup time), Ramp-down Time(Shutdown time) & ‘Hold Load for’ time. A standard thread group is not capable of fulfilling such requirement. To apply such conditional load on server we have to use Ultimate Thread Group. Using Ultimate Thread Group you can define initial delays and setup duration of your run.

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Thread Schedule

  • Start Thread Count: Here we can define the amount of threads to load in single set. Thread will start one by one until it reaches the count defined per row. Let’s say we have defined 20 Thread Count in first row then we are going to load 20 users first.

  • Initial Delay, Sec: This time decides after how many seconds we want to hit the server for the first time.

  • Startup Time ,Sec: This works as a Ramp-up time for threads to hit the server. Start Up Time is divided among each user(Start Thread Count/Startup Time). So if we have defined Start Thread count = 50 & Startup Time = 10 that means we are giving 5 seconds for each thread to hit the server. This configuration is applicable for a single row.

  • Hold Load For, sec: After all the threads are activated from the single row, JMeter will hold the load upto defined seconds.

  • Shutdown Time: After the Hold Load time period is over, JMeter will shutdown all the threads withing defined shutdown time period.

  • Add Row / Copy Row / Delete Row: To add, remove slots of Thread configuration. Here, each row is a separate slot.

Example

  • As you can see in above image we have added 3 rows with Thread count as 10, 20 & 30.
  • Initial delay for all 3 rows is kept same as 10 seconds.
  • So after initiation of execution, Jmeter will wait for 10 seconds to send the 1st thread to the server.
  • Startup Time is also same as 10 seconds. Hence, within 10 seconds all 60 Users will be sent to the server.
  • Now Hold Load Time is different for each row: 50, 100 & 150 seconds. So after 50 seconds of Startup time we will have Ramp down of threads defined in 1st row. As you can see, we are getting our first ramp-down at 1.10 mins (10+10+50 secs).
  • Similarly other Ramp-downs will occur as per the defined configuration.
<?xml version="1.0" encoding="UTF-8"?>
<jmeterTestPlan version="1.2" properties="3.1" jmeter="3.1 r1770033">
  <hashTree>
    <TestPlan guiclass="TestPlanGui" testclass="TestPlan" testname="测试计划" enabled="true">
      <stringProp name="TestPlan.comments"></stringProp>
      <boolProp name="TestPlan.functional_mode">false</boolProp>
      <boolProp name="TestPlan.serialize_threadgroups">false</boolProp>
      <elementProp name="TestPlan.user_defined_variables" elementType="Arguments" guiclass="ArgumentsPanel" testclass="Arguments" testname="用户定义的变量" enabled="true">
        <collectionProp name="Arguments.arguments"/>
      </elementProp>
      <stringProp name="TestPlan.user_define_classpath"></stringProp>
    </TestPlan>
    <hashTree>
      <kg.apc.jmeter.threads.UltimateThreadGroup guiclass="kg.apc.jmeter.threads.UltimateThreadGroupGui" testclass="kg.apc.jmeter.threads.UltimateThreadGroup" testname="jp@gc - Ultimate Thread Group" enabled="true">
        <collectionProp name="ultimatethreadgroupdata">
          <collectionProp name="-1175188856">
            <stringProp name="1567">10</stringProp>
            <stringProp name="1567">10</stringProp>
            <stringProp name="1567">10</stringProp>
            <stringProp name="1691">50</stringProp>
            <stringProp name="1567">10</stringProp>
          </collectionProp>
          <collectionProp name="-481295376">
            <stringProp name="1598">20</stringProp>
            <stringProp name="1567">10</stringProp>
            <stringProp name="1567">10</stringProp>
            <stringProp name="48625">100</stringProp>
            <stringProp name="1598">20</stringProp>
          </collectionProp>
          <collectionProp name="-1374446741">
            <stringProp name="1629">30</stringProp>
            <stringProp reference="../../collectionProp/stringProp[2]"/>
            <stringProp name="1567">10</stringProp>
            <stringProp name="48780">150</stringProp>
            <stringProp name="1629">30</stringProp>
          </collectionProp>
        </collectionProp>
        <elementProp name="ThreadGroup.main_controller" elementType="LoopController" guiclass="LoopControlPanel" testclass="LoopController" testname="循环控制器" enabled="true">
          <boolProp name="LoopController.continue_forever">false</boolProp>
          <intProp name="LoopController.loops">-1</intProp>
        </elementProp>
        <stringProp name="ThreadGroup.on_sample_error">continue</stringProp>
      </kg.apc.jmeter.threads.UltimateThreadGroup>
      <hashTree>
        <HTTPSamplerProxy guiclass="HttpTestSampleGui" testclass="HTTPSamplerProxy" testname="HTTP请求" enabled="true">
          <elementProp name="HTTPsampler.Arguments" elementType="Arguments" guiclass="HTTPArgumentsPanel" testclass="Arguments" testname="用户定义的变量" enabled="true">
            <collectionProp name="Arguments.arguments"/>
          </elementProp>
          <stringProp name="HTTPSampler.domain">www.zhibo8.cc</stringProp>
          <stringProp name="HTTPSampler.port"></stringProp>
          <stringProp name="HTTPSampler.connect_timeout"></stringProp>
          <stringProp name="HTTPSampler.response_timeout"></stringProp>
          <stringProp name="HTTPSampler.protocol"></stringProp>
          <stringProp name="HTTPSampler.contentEncoding"></stringProp>
          <stringProp name="HTTPSampler.path"></stringProp>
          <stringProp name="HTTPSampler.method">GET</stringProp>
          <boolProp name="HTTPSampler.follow_redirects">true</boolProp>
          <boolProp name="HTTPSampler.auto_redirects">false</boolProp>
          <boolProp name="HTTPSampler.use_keepalive">true</boolProp>
          <boolProp name="HTTPSampler.DO_MULTIPART_POST">false</boolProp>
          <boolProp name="HTTPSampler.monitor">false</boolProp>
          <stringProp name="HTTPSampler.embedded_url_re"></stringProp>
        </HTTPSamplerProxy>
        <hashTree/>
      </hashTree>
      <kg.apc.jmeter.vizualizers.CorrectedResultCollector guiclass="kg.apc.jmeter.vizualizers.ThreadsStateOverTimeGui" testclass="kg.apc.jmeter.vizualizers.CorrectedResultCollector" testname="jp@gc - Active Threads Over Time" enabled="true">
        <boolProp name="ResultCollector.error_logging">false</boolProp>
        <objProp>
          <name>saveConfig</name>
          <value class="SampleSaveConfiguration">
            <time>true</time>
            <latency>true</latency>
            <timestamp>true</timestamp>
            <success>true</success>
            <label>true</label>
            <code>true</code>
            <message>true</message>
            <threadName>true</threadName>
            <dataType>true</dataType>
            <encoding>false</encoding>
            <assertions>true</assertions>
            <subresults>true</subresults>
            <responseData>false</responseData>
            <samplerData>false</samplerData>
            <xml>true</xml>
            <fieldNames>true</fieldNames>
            <responseHeaders>false</responseHeaders>
            <requestHeaders>false</requestHeaders>
            <responseDataOnError>false</responseDataOnError>
            <saveAssertionResultsFailureMessage>true</saveAssertionResultsFailureMessage>
            <assertionsResultsToSave>0</assertionsResultsToSave>
            <bytes>true</bytes>
            <sentBytes>true</sentBytes>
            <threadCounts>true</threadCounts>
            <idleTime>true</idleTime>
            <connectTime>true</connectTime>
          </value>
        </objProp>
        <stringProp name="filename"></stringProp>
        <longProp name="interval_grouping">500</longProp>
        <boolProp name="graph_aggregated">false</boolProp>
        <stringProp name="include_sample_labels"></stringProp>
        <stringProp name="exclude_sample_labels"></stringProp>
        <stringProp name="start_offset"></stringProp>
        <stringProp name="end_offset"></stringProp>
        <boolProp name="include_checkbox_state">false</boolProp>
        <boolProp name="exclude_checkbox_state">false</boolProp>
      </kg.apc.jmeter.vizualizers.CorrectedResultCollector>
      <hashTree/>
    </hashTree>
  </hashTree>
</jmeterTestPlan>

NOTE: 理解下面的case与上面的case的区别

<?xml version="1.0" encoding="UTF-8"?>
<jmeterTestPlan version="1.2" properties="3.1" jmeter="3.1 r1770033">
  <hashTree>
    <TestPlan guiclass="TestPlanGui" testclass="TestPlan" testname="测试计划" enabled="true">
      <stringProp name="TestPlan.comments"></stringProp>
      <boolProp name="TestPlan.functional_mode">false</boolProp>
      <boolProp name="TestPlan.serialize_threadgroups">false</boolProp>
      <elementProp name="TestPlan.user_defined_variables" elementType="Arguments" guiclass="ArgumentsPanel" testclass="Arguments" testname="用户定义的变量" enabled="true">
        <collectionProp name="Arguments.arguments"/>
      </elementProp>
      <stringProp name="TestPlan.user_define_classpath"></stringProp>
    </TestPlan>
    <hashTree>
      <kg.apc.jmeter.threads.UltimateThreadGroup guiclass="kg.apc.jmeter.threads.UltimateThreadGroupGui" testclass="kg.apc.jmeter.threads.UltimateThreadGroup" testname="jp@gc - Ultimate Thread Group" enabled="true">
        <collectionProp name="ultimatethreadgroupdata">
          <collectionProp name="-1855169520">
            <stringProp name="1567">10</stringProp>
            <stringProp name="1567">10</stringProp>
            <stringProp name="48625">100</stringProp>
            <stringProp name="1691">50</stringProp>
            <stringProp name="10">10</stringProp>
          </collectionProp>
          <collectionProp name="-425309048">
            <stringProp name="1598">20</stringProp>
            <stringProp name="1567">10</stringProp>
            <stringProp name="1567">10</stringProp>
            <stringProp name="48625">100</stringProp>
            <stringProp name="1598">20</stringProp>
          </collectionProp>
        </collectionProp>
        <elementProp name="ThreadGroup.main_controller" elementType="LoopController" guiclass="LoopControlPanel" testclass="LoopController" testname="循环控制器" enabled="true">
          <boolProp name="LoopController.continue_forever">false</boolProp>
          <intProp name="LoopController.loops">-1</intProp>
        </elementProp>
        <stringProp name="ThreadGroup.on_sample_error">continue</stringProp>
      </kg.apc.jmeter.threads.UltimateThreadGroup>
      <hashTree>
        <HTTPSamplerProxy guiclass="HttpTestSampleGui" testclass="HTTPSamplerProxy" testname="HTTP请求" enabled="true">
          <elementProp name="HTTPsampler.Arguments" elementType="Arguments" guiclass="HTTPArgumentsPanel" testclass="Arguments" testname="用户定义的变量" enabled="true">
            <collectionProp name="Arguments.arguments"/>
          </elementProp>
          <stringProp name="HTTPSampler.domain">www.zhibo8.cc</stringProp>
          <stringProp name="HTTPSampler.port"></stringProp>
          <stringProp name="HTTPSampler.connect_timeout"></stringProp>
          <stringProp name="HTTPSampler.response_timeout"></stringProp>
          <stringProp name="HTTPSampler.protocol"></stringProp>
          <stringProp name="HTTPSampler.contentEncoding"></stringProp>
          <stringProp name="HTTPSampler.path"></stringProp>
          <stringProp name="HTTPSampler.method">GET</stringProp>
          <boolProp name="HTTPSampler.follow_redirects">true</boolProp>
          <boolProp name="HTTPSampler.auto_redirects">false</boolProp>
          <boolProp name="HTTPSampler.use_keepalive">true</boolProp>
          <boolProp name="HTTPSampler.DO_MULTIPART_POST">false</boolProp>
          <boolProp name="HTTPSampler.monitor">false</boolProp>
          <stringProp name="HTTPSampler.embedded_url_re"></stringProp>
        </HTTPSamplerProxy>
        <hashTree/>
      </hashTree>
      <kg.apc.jmeter.vizualizers.CorrectedResultCollector guiclass="kg.apc.jmeter.vizualizers.ThreadsStateOverTimeGui" testclass="kg.apc.jmeter.vizualizers.CorrectedResultCollector" testname="jp@gc - Active Threads Over Time" enabled="true">
        <boolProp name="ResultCollector.error_logging">false</boolProp>
        <objProp>
          <name>saveConfig</name>
          <value class="SampleSaveConfiguration">
            <time>true</time>
            <latency>true</latency>
            <timestamp>true</timestamp>
            <success>true</success>
            <label>true</label>
            <code>true</code>
            <message>true</message>
            <threadName>true</threadName>
            <dataType>true</dataType>
            <encoding>false</encoding>
            <assertions>true</assertions>
            <subresults>true</subresults>
            <responseData>false</responseData>
            <samplerData>false</samplerData>
            <xml>true</xml>
            <fieldNames>true</fieldNames>
            <responseHeaders>false</responseHeaders>
            <requestHeaders>false</requestHeaders>
            <responseDataOnError>false</responseDataOnError>
            <saveAssertionResultsFailureMessage>true</saveAssertionResultsFailureMessage>
            <assertionsResultsToSave>0</assertionsResultsToSave>
            <bytes>true</bytes>
            <sentBytes>true</sentBytes>
            <threadCounts>true</threadCounts>
            <idleTime>true</idleTime>
            <connectTime>true</connectTime>
          </value>
        </objProp>
        <stringProp name="filename"></stringProp>
        <longProp name="interval_grouping">500</longProp>
        <boolProp name="graph_aggregated">false</boolProp>
        <stringProp name="include_sample_labels"></stringProp>
        <stringProp name="exclude_sample_labels"></stringProp>
        <stringProp name="start_offset"></stringProp>
        <stringProp name="end_offset"></stringProp>
        <boolProp name="include_checkbox_state">false</boolProp>
        <boolProp name="exclude_checkbox_state">false</boolProp>
      </kg.apc.jmeter.vizualizers.CorrectedResultCollector>
      <hashTree/>
    </hashTree>
  </hashTree>
</jmeterTestPlan>
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