On 04/05/2009, C.Vijayakumar <[email protected]> wrote: > Hi Sebb / Matt , > > Am using JMeter for Load testing our Java application . I have some doubts > on using JMeter . Could you please help me to solve my doubts pls ? > > My Tuning Parameters are as follows > > set HEAP=-Xms512m -Xmx1024m > set NEW=-XX:NewSize=128m -XX:MaxNewSize=128m > set SURVIVOR=-XX:SurvivorRatio=8 -XX:TargetSurvivorRatio=50% > set TENURING=-XX:MaxTenuringThreshold=2 > set EVACUATION=-XX:MaxLiveObjectEvacuationRatio=20% > set RMIGC=-Dsun.rmi.dgc.client.gcInterval=600000 > -Dsun.rmi.dgc.server.gcInterval=600000 > set PERM=-XX:PermSize=128m -XX:MaxPermSize=128m > set DEBUG=-verbose:gc -XX:+PrintTenuringDistribution > > > I have defined the Heap size as 512 - 1024 & My RAM size is 512 MB . I have > run my Test Plan using JDBC Connection configuration for 3964 concurrent > users successfully . If I use more than 4000 Users , JMeter shows Out of > Memory error . Even if i tried running the test plan by changing the Heap > size as 256 - 1024 , 768 - 1536 & 512 - 512 , there is no improvement on my > concurrent users , still am getting Out of memory error message > > I tried the same test plan in another system which has 1 GB RAM , But in > that system, Only 2000 concurrent users have successfully completed and I > got the same Out of Memory error . > > Could anyone / you please reveal me what I have to do to get proper results > for more than 5000 Concurrent users ?
That's a lot of users. Are you sure you need to test with so many? Remember that JMeter can put a lot more load on a server than a real user, unless you include appropriate wait times. If you really need to test with that many users, then use non-GUI mode, and run the same test in parallel on several different hosts, then combine the results. Also, depending on your OS, 1GB is not very much memory for such a large number of users. See also: http://jakarta.apache.org/jmeter/usermanual/best-practices.html#lean_mean JMeter distributed mode (client-server) is unlikely to help here, as the JMeter client and network are likely to become a bottle-neck. > Thanking you in Advance . > > Thanking you . > With warm regards., > > Vijayakumar.C > > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
