It would be useful to know if it is as hungry without the Aggregate Listeners.
Also, try running the same test in non-GUI mode. You could try this with a Summariser, if you want to keep some track of what is happening. As the others have said, it is already capable of decent performance, but of course if we can find and fix some memory leaks, not many (*) would complain... S. (*) except perhaps the chip industry! -----Original Message----- From: Peter Lin [mailto:[EMAIL PROTECTED] Sent: 01 July 2004 03:33 To: JMeter Users List; [EMAIL PROTECTED] Subject: Re: jmeter memory consumption to my knowledge, even if you use a commercial product like mercury. You still can't simulate 250 threads from one system without it eating a ton of memory. In fact, I believe mercury doesn't recommend you try it, unless you're using a beefy dual or quad CPU server with 8Gb of RAM, Gigabit ethernet and Gigabit router. in fact, since mercury prefers to save the results to a database, you'd have a hard time doing it from one system. Mercury happens to have a good reputation and is considered a reliable testing tool. I've been able to go up to 75 threads with JMeter with decent performance. For more than 100 threads I always use multiple client machines. peter On Wed, 30 Jun 2004 22:29:06 -0400, Michael Stover <[EMAIL PROTECTED]> wrote: > > So what's the problem, exactly? > > -Mike > > On Wed, 2004-06-30 at 20:21, Remedy QA wrote: > > It seems Jmeter is a memory hogger. If given more memory, it will keep consuming. I am using JMeter nightly build of June 12. > > > > During my test run of approximately 50 minutes, with 250 virtual users on one GUI Jmeter client, it managed to consume about 1 GB of real memory. As the test continued, the memory just kept diminishing. The garbage collecting (minor collecting) happened about every 20 to 60 seconds. The CPU spikes happen when there are GCs. > > > > I also ran the same test on a machine with only 1 GB of RAM. When the test was over, real memory was at about 32mb. > > > > I tried with non-GUI mode but several threads hung and never was able to finish. > > > > So it seems that if I use a machine with more memory and give it a bigger heap, it just consumes as much as it can. I don't think 250 virtual users for the machine type I use is too much load. There must be something I am missing. Any help appreciated. > > > > I ran a test with the following configuration: > > > > Single JMeter Client on Windows 2000 Server, 2 GB RAM, single 2.8 Ghz Pentium 4 CPU. JDK 1.4.2_04 > > > > JMeter JVM settings: > > set HEAP=-Xms1280m -Xmx1280m > > set NEW=-XX:NewSize=512m -XX:MaxNewSize=512m > > set DEBUG=-verbose:gc -XX:-PrintTenuringDistribution -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintGCApplicationConcurrentTime -XX:+PrintGCApplicationStoppedTime > > > > All other JVM settings are the defaults that came with jmeter.bat. > > > > JMeter output set to CSV, jmeter and jorphan logging set to warning. > > > > Jmeter script: > > > > Test Plan > > ThreadGroup - 250 virtual users, ramping up every 5 seconds. Loop once. > > Aggregate Listener > > Simple Controller > > 8 HTTP Requests in here > > 3 Aggregate Listeners in here > > Runtime Controller - 45 minutes total for all users. > > 33 HTTP Requests in here > > 2 Aggregate Listeners in here > > Simple Controller > > 2 HTTP Requests in here. > > > > > > > > > > --------------------------------- > > Do you Yahoo!? > > Yahoo! Mail is new and improved - Check it out! > -- > Michael Stover <[EMAIL PROTECTED]> > Apache Software Foundation > > --------------------------------------------------------------------- > 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] ___________________________________________________________________________ This e-mail and the documents attached are confidential and intended solely for the addressee; it may also be privileged. If you receive this e-mail in error, please notify the sender immediately and destroy it. As its integrity cannot be secured on the Internet, the Atos Origin group liability cannot be triggered for the message content. Although the sender endeavours to maintain a computer virus-free network, the sender does not warrant that this transmission is virus-free and will not be liable for any damages resulting from any virus transmitted. ___________________________________________________________________________ --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
