Hmm, just ignoring jconsole for a moment, what does your OS say about its CPU usage? Does top, prstat, acitivity monitor, or task manager show that your Java process is also using 25% CPU? Is that 25% combined, or is that just User space, not counting time in Kernel space?
Once again, I'd just like to rule out a bottleneck at the network level. Can you check how much bandwidth you're using, and compare it to the amount of bandwidth that's available on your network? How large are the transactions? 100tx/sec multiplied by (arbitrary) 100 kilobytes per transaction is a full 10 MBps, which will easily saturate a 100Mbps ethernet link. Also, does changing the thread count do anything to your Transaction rate? Do you still only get 100 tx/sec if you increase the thread count? What is the impact on your CPU usage when you double the thread countL Also, do you know if your system policy is limiting your resource usage to a given percentage? On Wed, Feb 25, 2009 at 11:46 AM, Toni Menendez Lopez <[email protected]> wrote: > I am testing a Huge platform that is able to get like 5000reqxseg, and now I > am only sending 100reqxseg, so my Load is doing nothing to the Tested > server. > > About logs, I am not writing any logs in my jmeter... > > May main question, and I am not able to find a solution, and I am browsing > in google is why with jconsole the CPU of the JVM is not able to go further > than 25% even when I have much free CPU. > > Toni. > > 2009/2/25 Thomas Johnson <[email protected]> > >> Just curious -- what kind of system are you testing? >> >> Are you doing tests against a website? You might be hitting bandwidth >> limitations, meaning that the test machine's CPU has nothing to do >> while it waits for the network. If you are running the server on the >> same system, the server might be eating the other 75% of the CPU. >> >> Also, if you are logging data, what kind of device are you writing >> logs to? Is it a local hard drive, or a networked drive? >> >> On Wed, Feb 25, 2009 at 11:17 AM, Toni Menendez Lopez >> <[email protected]> wrote: >> > OK, I have a look to the links and still thinks that I don´t underestand >> > quite well, I explain to you : >> > >> > After lloking in the CPU´s in OS I can see that the threads are spread in >> > all CPU´s look attachment ( CPU.jpg ). >> > >> > After this I tried to check the JVM working mode and I go to jconsole, >> and >> > now in this case I am not able to get more than 25% of CPU, look the >> > graph... (jconsole.jpg) >> > >> > Do you have any idea why the JVM of the jmeter is not able to go further >> > than 25% ? >> > >> > >> > Toni. >> > >> > >> > >> > >> > 2009/2/25 <[email protected]> >> > >> > Hello Toni, I think Sebb et. al. was trying to get you to understand the >> >> complexities of the JVM (see link). Even ANSI C daemons that clone >> >> themselves and spawn off all new OS processes don't really get involved >> with >> >> hardware CPUs as a plural concern. >> >> >> >> http://www.mindprod.com/jgloss/jvm.html >> >> >> >> >> >> Secondly, if you are concerned with JMeter and performance testing and >> the >> >> performance of JMeter itself during serious application testing take a >> look >> >> at this link: >> >> >> >> >> >> >> http://jakarta.apache.org/jmeter/usermanual/jmeter_distributed_testing_step_by_step.pdf >> >> >> >> Toni Menendez Lopez wrote .. >> >> > But normal behaviour of Jmeter if I don´t change anything , does not >> >> permit >> >> > multi-cpu, isn´t it ? >> >> > >> >> > Toni. >> >> > >> >> > 2009/2/24 Toni Menendez Lopez <[email protected]> >> >> > >> >> > > Just any clue where to find ? >> >> > > >> >> > > Toni. >> >> > > >> >> > > 2009/2/24 sebb <[email protected]> >> >> > > >> >> > >> Check the JVM documentation? >> >> > >> >> >> > >> On 24/02/2009, Toni Menendez Lopez <[email protected]> wrote: >> >> > >> > Which parameter I can add to JVM to use more than 1 CPU ? >> >> > >> > >> >> > >> > Toni. >> >> > >> > >> >> > >> > 2009/2/24 sebb <[email protected]> >> >> > >> > >> >> > >> > >> >> > >> > > On 24/02/2009, Toni Menendez Lopez <[email protected]> >> wrote: >> >> > >> > > > Hello, every body.... >> >> > >> > > > >> >> > >> > > > Just one question, Is it possible to send jmeter to work in >> >> > >> multiple >> >> > >> > > CPUs as >> >> > >> > > > a single process, or I have to send a process for each CPU >> ? >> >> > >> > > >> >> > >> > > JMeter is pure Java, and will use as many CPUs as the JVM may >> >> choose >> >> > >> to >> >> > >> > > use. >> >> > >> > > >> >> > >> > > > >> >> > >> > > > Toni. >> >> > >> > > > >> >> > >> > > >> >> > >> > >> >> > >> > > >> >> --------------------------------------------------------------------- >> >> > >> > > To unsubscribe, e-mail: >> >> [email protected] >> >> > >> > > For additional commands, e-mail: >> >> [email protected] >> >> > >> > > >> >> > >> > > >> >> > >> > >> >> > >> >> >> > >> >> --------------------------------------------------------------------- >> >> > >> To unsubscribe, e-mail: [email protected] >> >> > >> For additional commands, e-mail: >> [email protected] >> >> > >> >> >> > >> >> >> > > >> >> >> >> >> >> --------------------------------------------------------------------- >> >> To unsubscribe, e-mail: [email protected] >> >> For additional commands, e-mail: [email protected] >> >> >> > >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: [email protected] >> For additional commands, e-mail: [email protected] >> >> > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
