THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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5. You can also use the following package that mixes Excel Macro, java transformation and xsl transformation of the .jtl files. It automatically generates Excel graphs using a Macro. The package is available here :
attachment:scripts_jmeter.zip
Testing a High
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Volume Webservice: Simple Data Writer, Bash scripts & Excel Graphs
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For a |
telecoms project, JMeter was used to test a new high-availability integration layer, exposed to a few internal clients (see also \[:../UserManual/BuildWSTest:BuildWSTest\]). Several instances of JMeter represented the different clients and varying load profiles. The default JMeter XML output is too verbose, and the files grew too enormous, so the *Simple Data Writer* was used to produce much friendlier CSV results files. I wanted to show throughput & response times in blocks of 1 minute; JMeter's inbuilt Graph function was not sufficient to process the volume of data. An example of the type of graph required follows. The reader will see that the JMeter test plan produced variations in load (normal, high & spike), and the response times were quite well-behaved. If the integration layer was performing poorly, the graph would show inconsistent throughput and fluctuating |
Simple Data Writer JTL files
response times. [BR] attachment:throughput-graph.png [BR] |
Simple Data Writer JTL files
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JMeter's \[http://jakarta.apache.org/jmeter/usermanual/build-monitor-test-plan.html Simple Data Writer\] produces JTL output files which convey the same information as the default XML output, but the CSV format is much denser. Example: |
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queryBalance.jtl timeStamp,elapsed,label,responseCode,responseMessage,threadName,dataType,success,bytes,grpThreads,allThreads,URL 1158477785863,351,SL_queryBalance,200,,queryBalance 1-1,text,true,87,7,7,http://123.45.67.89:8080/WebService 1158477785953,291,SL_queryBalance,200,,queryBalance 1-4,text,true,87,7,7,http://123.45.67.89:8080/WebService 1158477785883,431,SL_queryBalance,200,,queryBalance 1-2,text,true,87,8,8,http://123.45.67.89:8080/WebService 1158477786013,301,SL_queryBalance,200,,queryBalance 1-5,text,true,87,8,8,http://123.45.67.89:8080/WebService 1158477785883,481,SL_queryBalance,200,,queryBalance 1-3,text,true,87,9,9,http://123.45.67.89:8080/WebService 1158477786113,331,SL_queryBalance,200,,queryBalance 1-6,text,true,87,10,10,http://123.45.67.89:8080/WebService 1158477786183,301,SL_queryBalance,200,,queryBalance 1-7,text,true,87,11,11,http://123.45.67.89:8080/WebService 1158477786404,120,SL_queryBalance,200,,queryBalance 1-10,text,true,87,11,11,http://123.45.67.89:8080/WebService 1158477786334,200,SL_queryBalance,200,,queryBalance 1-9,text,true,87,11,11,http://123.45.67.89:8080/WebService 1158477786254,290,SL_queryBalance,200,,queryBalance 1-8,text,true,87,11,11,http://123.45.67.89:8080/WebService 1158477786474,140,SL_queryBalance,200,,queryBalance 1-11,text,true,87,12,12,http://123.45.67.89:8080/WebService ... |
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Script: attachment:jtltotals.sh.txt [BR] After a test run, all the JTL output files were gathered together (20 or so files) in a bunch of subdirectories. The analysis was conducted on a Windows PC with MinGW/MinSYS and a few other tools (msys-dtk, gnu bc, gnu paste, gVim). For an overview of total vs. projected throughput, I used the shell script {{jtltotals.sh}} (a bit kludgy but hey I'm a tester not a developer!). It collates \[total throughput, start time, end time, time elapsed, average response time\] for each output file. This script will produce a (comma-delimited) file 'jtl-file-totals.txt'. A sample of output is shown below. |
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An example session, using jtlmin.sh to process a JTL file. The file produced, queryBalance.jtl.OUT (tab-delimited), can now be used to produce throughput graph. Response times can also be included on the secondary axis, as in the diagram above. These graphs were very good at showing when the integration layer was slow to respond and when throughput varied from the original JMeter plan.
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