Thanks Sebb. I'll look into JVM 1.6 on XP and maybe GC tracing on the JVMs (I am not much of an expert in that, I'm afraid).
My gut feel is this level of load testing simply is too much for VMWare to handle. I now run multiple load tests on two different Redhat/VMWare virtuals - one with JVM 1.5 and the other with JVM 1.6. On both systems, the load tests took 2 + hours (compared to less than an hour on real hardware), and threw out of memory errors even after increasing JVM heap memory (to 1536 MB). The same load tests ran fine on my Windows XP 'real' hardware box. This is after increasing the ESX server 'RAM' and 'CPU MHz' allocations to match my 'real' box. Kind regards, Sonam Chauhan -- Corporate Express Australia Ltd. Phone: +61-2-93350725, Email: [EMAIL PROTECTED] -----Original Message----- From: sebb [mailto:[EMAIL PROTECTED] Sent: Friday, 28 September 2007 8:12 PM To: JMeter Users List Subject: Re: OutOfMemoryError with stacktrace. On 28/09/2007, Sonam Chauhan <[EMAIL PROTECTED]> wrote: > Hello - > > > > I'm currently running JMeter 2.1.1 with Sun JVM 1.6 on RHEL ES 4 Linux > on VMWare ESX server, and am struggling with out of memory errors > running JMeter. > Might be a garbage collection issue? Perhaps you could enable GC tracing on the JVMs, and compare the two systems. > > The same tests running on a Windows XP box (Sun JVM 1.5) don't throw out > of memory errors. What about JVM 1.6 on XP? > > Here's 'top' output of the process : > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > > > 24733 metatest 25 0 977m 150m 6320 S 99.2 4.0 16:20.65 java > > > > Normally I get errors with no stacktrace: > > java.lang.OutOfMemoryError: Java heap space > > > > However, upping the JVM max. heap memory to 1.5 GB, gave of memory error > with a stacktrace (see end of email). Is this significant or useful? > I don't think so. It just shows that the JVM ran out of memory trying to log a message. This was just "the straw that broke the camel's back", The rest of the straw was loaded previously by other parts of the test. > > Kind regards, > > Sonam Chauhan > > -- > > Corporate Express Australia Ltd. > > Phone: +61-2-93350725, Email: [EMAIL PROTECTED] > > > > > > > > STACKTRACE > > > > java.lang.OutOfMemoryError: Java heap space > > at java.util.Arrays.copyOf(Arrays.java:2882) > > at > java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.jav > a: > > 100) > > at > java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:390) > > at java.lang.StringBuffer.append(StringBuffer.java:224) > > at java.io.StringWriter.write(StringWriter.java:95) > > at java.io.PrintWriter.write(PrintWriter.java:412) > > at java.io.PrintWriter.write(PrintWriter.java:429) > > at java.io.PrintWriter.print(PrintWriter.java:559) > > at java.io.PrintWriter.println(PrintWriter.java:695) > > at java.lang.Throwable.printStackTrace(Throwable.java:512) > > at > org.apache.log.format.PatternFormatter.getStackTrace(PatternFormatter.ja > va > > :638) > > at > org.apache.log.format.PatternFormatter.formatPatternRun(PatternFormatter > .j > > ava:519) > > at > org.apache.log.format.PatternFormatter.format(PatternFormatter.java:493) > > at > org.apache.log.output.AbstractOutputTarget.format(AbstractOutputTarget.j > av > > a:189) > > at > org.apache.log.output.AbstractOutputTarget.doProcessEvent(AbstractOutput > Ta > > rget.java:148) > > at > org.apache.log.output.AbstractTarget.processEvent(AbstractTarget.java:14 > 5) > > at org.apache.log.Logger.fireEvent(Logger.java:708) > > at org.apache.log.Logger.output(Logger.java:683) > > at org.apache.log.Logger.output(Logger.java:666) > > at org.apache.log.Logger.error(Logger.java:267) > > at > org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:298) > > at java.lang.Thread.run(Thread.java:619) > > --------------------------------------------------------------------- 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]
