Jmeter same threads but different ramp up time crashes server?

0
votes

I'm using Jmeter 2.13 and something interesting is happening for which I need some help. I did two test on website with settings

test 1

users: 500 ramp up time:60

result:smooth connections

test 2

users: 500 ramp up time:120

result: crashes java

All I know is the Apache java GUI crashes. I don't know how to troubleshoot what's causing the crash. I know there are some elements with GUI you can configure to observe Jmeter server health stats i.e threads, load etc.

Also, on the settings where it crashes, a single request is made every 0.24 seconds.

On test case 1 where it worked this equates to 0.12 seconds a single request is made.

If the calculations are correct, theoretically speaking, it shouldn't crash right? (because the difference in negligible)

1
jmeterperformance-testing
What about the jmeter.log file? This usually captures the exceptions. What is your loop count? or is it forever? – Richard Friedman
I just created a simple test and used 500 Users / 120 Ramp Up / Loop 500, and tested from my machine ( mbp ) and redline13 . Both worked fine, though my test server did not hold up since this simulated 250,000 * 2 test pages requested. Here is output of result with 500 iterations, which I did terminate early large test plan and smaller version only 5 iterations smaller test plan. Test plan can be downloaded from there. To help really need more info about your test-plan. – Richard Friedman
loop was one in both cases. Thanks a lot for testing it at your own end. – asad
and also explain did you perform in distributed way? – asad

1 Answers

0
votes

The answer is simple: don't use GUI mode to run a JMeter test. Ever. Use GUI only for test development and debugging.

Running JMeter in non-GUI mode is fairly simple:

 jmeter -n -t /path/to/your/testplan.jmx -l /path/to/resultsfile.jtl

Once test finished you can open resultsfile.jtl with your favourite listener and analyse test results.

For more JMeter-side performance tips and tricks see JMeter Performance and Tuning Tips guide.