This is a very good article. Reading is not bad. Digesting is another thing. I'm still working on it.
-----Original Message----- From: Jordi Salvat i Alabart [mailto:[EMAIL PROTECTED] Sent: Tuesday, August 24, 2004 8:21 AM To: JMeter Users List Subject: Re: win 2000 Check this: http://www.atg.com/portal/myatg/developer?paf_dm=full&paf_gear_id=110001 0&detailArticle=true&id=9606 En/na Michael Chandler ha escrit: > Maybe this is a dumb question but is there a way I can tell what the > heap size is before I try setting it? Or what is available? Can you tell > me the relationship between -Xms/-Xmx and -XX:NewSize/-XX:MaxNewSize? > Maybe this will help me understand the two settings. > > -----Original Message----- > From: Peter Lin [mailto:[EMAIL PROTECTED] > Sent: Tuesday, August 24, 2004 6:38 AM > To: JMeter Users List > Subject: Re: win 2000 > > 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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