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I am attempting to stress a server as much as I can before it goes into production. I’m using Jmeter and have been able to add a little more stress by modifying scripts. I’ve also modified JVM options but still not enough. What are some of the best ways to increase server load?

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Several ways to do that. You can simply use dd, like :

dd if=/dev/zero of=/dev/null

Or there are other tools like stress :

stress --cpu 2 --timeout 60

The above will stress two cores for 60 seconds.
Or you can also use an endless while loop :

while true; do true; done

Another possibility is this fork bomb - careful with this as it might even crash your computer :

:(){ :|:& };:

There are many other possibilities.

  • Thanks Mazs. I'm a Developer and have been tasked with this so excuse my novelty. Where would this dd command be ran? Probably a System Admin needs to do it? Where would the while loop be placed? Configuration file? – Angular_Newbie May 11 '16 at 14:28
  • All of these should be executed in a terminal / bash. The dd command is usually present on every Linux system. while and the fork bomb are bash internal commands. stress is an external tool, must be installed (here is a link on howto install stress on Solaris : opencsw.org/package/stress). – mazs May 11 '16 at 14:36
  • but these will increase load on the OS level - do you want to increase load for the Java server, like generating traffic and requests and so on ? – mazs May 11 '16 at 14:37
  • Yes. Load on Java Server. Web Traffic/ requests, etc. – Angular_Newbie May 11 '16 at 14:38
  • yeah thats a different thing....on others forums ppl speak about Jmeter, The Grinder, Pylot, but i think you have to create more complex tests to really stress the server. There is more info on this link : stackoverflow.com/questions/7492/… – mazs May 11 '16 at 14:45

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