Where does the -server switch go? Java -jar ApacheJMeter.jar -server ????? -----Original Message----- From: Peter Lin [mailto:[EMAIL PROTECTED] Sent: Tuesday, August 24, 2004 8:32 AM To: JMeter Users List Subject: Re: win 2000
yeah, that is understandable, since Sun says the extended options are not required of all VM. peter On Tue, 24 Aug 2004 16:25:56 +0200, Jordi Salvat i Alabart <[EMAIL PROTECTED]> wrote: > "-server" provides much more significant gains than any heap/GC tuning. > I didn't dare to put it in the script because I've seen JREs that didn't > accept it (though these may no longer be in use nowadays). > > The heap tuning only provides unmeasurable gains at relatively low loads > (i.e. when the CPU of the machine where JMeter runs is below 50%). Even > the gains at high loads are small (run with "-verbose:gc" to get a log > of times devoted to GC), although it becomes more important with complex > long-running tests that have higher memory needs. But yhe most important > effect is still that Full GC pauses are almost completely elliminated, > which is good because they sometimes caused significant disturbance in > the measurements in short-running tests. > > > > -- > Salut, > > Jordi. > > En/na Peter Lin ha escrit: > > that's strange. when I run it with and without the extra options on my > > gateway laptop running XP and my old P3 450 it is faster if I just > > have "-server" without all the extra options. > > > > maybe it's just my system or configuration. > > > > peter > > > > > > On Tue, 24 Aug 2004 13:13:29 +0200, Jordi Salvat i Alabart > > <[EMAIL PROTECTED]> wrote: > > > >>It's exactly the opposite: you'll want those parameters (tuned as > >>suggested in the script's comments) when you need to generate high loads > >>-- that is: in actual use, not during development. > >> > >>These settings minimise (or almost) the amount of time spent in garbage > >>collection. This increases maximum throughput (i.e. the amount of > >>traffic you can generate with a given machine and a given script). They > >>also reduce the frequency of full GCs to a minimum (most tests running > >>for only a few hours will never need a full GC) thus reducing > >>measurement error. > >> > >>I can't tell why Michael is getting that error with the HEAP options in > >>place -- those default parameters work well for me with JDK 1.4.2_03 (I > >>don't have _04 at hand). > >> > >>But removing the -Xms/-Xmx without removing the > >>-XX:NewSize/-XX:MaxNewSize as he did in his last message causes exactly > >>that (as I would expect: the default heap is far too small to accomodate > >>a 128m new space). So leave all those parameters in place or remove them > >>all. > >> > >>-- > >>Salut, > >> > >>Jordi. > >> > >>En/na Peter Lin ha escrit: > >> > >> > >> > >>>can you try commenting out all the extra VM parameters? > >>> > >>>usually I do that, since many of the settings really shouldn't be used > >>>for regular use. It's good for developers writing samplers and > >>>plugins, but not necessarily great for just running tests. > >>> > >>>peter > >>> > >>> > >>>On Mon, 23 Aug 2004 13:16:16 -0600, Michael Chandler > >>><[EMAIL PROTECTED]> wrote: > >>> > >>> > >>>>I installed j2sdk1.4.2_04. The same on both XP and win2k. I also have > >>>>j2sdk1.4.0-rc and j2sdk1.4.0_01. The newer one is first in my path and > >>>>classpath. > >>>> > >>>>Here is the echo (without [HEAP=-Xms256m -Xmx256m]): > >>>>echo %JAVA_HOME%\bin\java %JVM_ARGS% %ARGS% -jar ApacheJMeter.jar > >>>>%JMETER_CMD_LINE_ARGS% > >>>> > >>>>c:\j2sdk1.4.2_04\bin\java -XX:NewSize=128m -XX:MaxNewSize=128m > >>>>-XX:SurvivorRatio=8 -XX:TargetSurvivorRatio=50 > >>>>-XX:MaxTenuringThreshold=2 -XX:MaxLiveObjectEvacuationRatio=20 > >>>>-Dsun.rmi.dgc.client.gcInterval=600000 > >>>>-Dsun.rmi.dgc.server.gcInterval=600000 -XX:PermSize=64m > >>>>-XX:MaxPermSize=64m -verbose:gc -XX:+PrintTenuringDistribution -jar > >>>>ApacheJMeter.jar > >>>>Error occurred during initialization of VM > >>>>Incompatible initial and maximum heap sizes specified > >>>> > >>>>-----Original Message----- > >>>>From: BAZLEY, Sebastian [mailto:[EMAIL PROTECTED] > >>>>Sent: Monday, August 23, 2004 12:16 PM > >>>>To: 'JMeter Users List' > >>>>Subject: RE: win 2000 > >>>> > >>>>Did you install the full JDK, or just the JRE? > >>>> > >>>>Some of the options may only make sense if the "server" flavour of the > >>>>JVM > >>>>is installed. > >>>> > >>>>Certainly java -server only works if the full JDK is installed ... > >>>> > >>>>S. > >>>>-----Original Message----- > >>>>From: Michael Chandler [mailto:[EMAIL PROTECTED] > >>>>Sent: 23 August 2004 19:07 > >>>>To: JMeter Users List > >>>>Subject: RE: win 2000 > >>>> > >>>>If I take it out, it still gives me the error. I'll try rebooting here > >>>>in a minute and do it again. I've tried several combos. I'll look at > >>>>java - X, also. > >>>> > >>>>-----Original Message----- > >>>>From: Peter Lin [mailto:[EMAIL PROTECTED] > >>>>Sent: Monday, August 23, 2004 11:55 AM > >>>>To: JMeter Users List > >>>>Subject: Re: win 2000 > >>>> > >>>>it should work if you remove it. I have JMeter 2 and 1.9 running on my > >>>>workstation at home, which is running win2K. it works with Sun > >>>>jdk1.4.2_03 and jdk5 > >>>> > >>>>peter > >>>> > >>>>On Mon, 23 Aug 2004 11:44:58 -0600, Michael Chandler > >>>><[EMAIL PROTECTED]> wrote: > >>>> > >>>> > >>>>>I've been running Jmeter successfully on my XP box. When I try to run > >>>> > >>>>it > >>>> > >>>> > >>>>>on a Win 2000 box, I get the error: > >>>>> > >>>>>Error occurred during initialization of VM > >>>>>Incompatible initial and maximum heap sizes specified. > >>>>> > >>>>>The jmeter.bat file has the entry: > >>>>>set HEAP=-Xms256m -Xmx256m > >>>>> > >>>>>I tried resetting it but haven't found the correct combination. > >>>>> > >>>>>Any ideas? > >>>>> > >>>>> > >>>> > >>>>-------------------------------------------------------------------- - > >>>>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. 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