[gentoo-java] Memory heap size problem

[gentoo-java] Memory heap size problem

[Adam Carter]

A cisco web java gui is complaing "Your current java memory heap size is less than 256 MB. You must increate the Java memory heap size" etc. On windows and on a previous gentoo x86 box putting -Xmx256m in the java applet runtime settings makes it work. This box is a newly build amd64.

Looks like the .jnlp is setting the memory;

sphinx deployment # grep max /tmp/idm-1.jnlp
    <j2se version="1.4+" initial-heap-size="64m" max-heap-size="256m"/>

And the app is running with the required Xmx256m parameter;

sphinx deployment # pgrep -lf java
10147 /opt/sun-jdk-1.6.0.13/jre/bin/java -Xmx256m -Xbootclasspath/a:/opt/sun-jdk-1.6.0.13/jre/lib/javaws.jar:/opt/sun-jdk-1.6.0.13/jre/lib/deploy.jar:/opt/sun-jdk-1.6.0.13/jre/lib/plugin.jar -classpath /opt/sun-jdk-1.6.0.13/jre/lib/deploy.jar -Djnlpx.vmargs=-Xmx256m -Djnlpx.jvm=/opt/sun-jdk-1.6.0.13/jre/bin/java -Djnlpx.splashport=36054 -Djnlpx.home=/opt/sun-jdk-1.6.0.13/jre/bin -Djnlpx.remove=false -Djnlpx.offline=false -Djnlpx.relaunch=true -Djnlpx.heapsize=67108864,268435456 -Djava.security.policy=file:/opt/sun-jdk-1.6.0.13/jre/lib/security/javaws.policy -DtrustProxy=true -Xverify:remote com.sun.javaws.Main file:///tmp/idm-9.jnlp

So it looks like it should work - any ideas on how to fix this? (sun-jdk-1.6.0.13, also tried a 1.5 but had the same problem).

Re: [gentoo-java] Memory heap size problem

[Vlastimil Babka]

Adam Carter wrote:
> A cisco web java gui is complaing "Your current java memory heap size
> is less than 256 MB. You must increate the Java memory heap size"
> etc. On windows and on a previous gentoo x86 box putting -Xmx256m in
> the java applet runtime settings makes it work. This box is a newly
> build amd64.

Hi,

I don't know this app, but I'd just try 512m instead of 256m... amd64
tends to need more than x86 :) I'm not sure the app can test the 
parameter directly, they probably run out of heap and suggest this size 
which was known working on x86.

Vlastimil

> Looks like the .jnlp is setting the memory;
> 
> sphinx deployment # grep max /tmp/idm-1.jnlp <j2se version="1.4+"
> initial-heap-size="64m" max-heap-size="256m"/>
> 
> And the app is running with the required Xmx256m parameter;
> 
> sphinx deployment # pgrep -lf java 10147
> /opt/sun-jdk-1.6.0.13/jre/bin/java -Xmx256m
> -Xbootclasspath/a:/opt/sun-jdk-1.6.0.13/jre/lib/javaws.jar:/opt/sun-jdk-1.6.0.13/jre/lib/deploy.jar:/opt/sun-jdk-1.6.0.13/jre/lib/plugin.jar
> -classpath /opt/sun-jdk-1.6.0.13/jre/lib/deploy.jar
> -Djnlpx.vmargs=-Xmx256m
> -Djnlpx.jvm=/opt/sun-jdk-1.6.0.13/jre/bin/java
> -Djnlpx.splashport=36054 -Djnlpx.home=/opt/sun-jdk-1.6.0.13/jre/bin
> -Djnlpx.remove=false -Djnlpx.offline=false -Djnlpx.relaunch=true
> -Djnlpx.heapsize=67108864,268435456
> -Djava.security.policy=file:/opt/sun-jdk-1.6.0.13/jre/lib/security/javaws.policy
> -DtrustProxy=true -Xverify:remote com.sun.javaws.Main
> file:///tmp/idm-9.jnlp
> 
> So it looks like it should work - any ideas on how to fix this?
> (sun-jdk-1.6.0.13, also tried a 1.5 but had the same problem).
> 
> 

Re: [gentoo-java] Memory heap size problem

[gnul]

You might try some other flags such as -server (which just uses a
different set of JVM defaults) as well as -XX:MaxPermSize

http://www.unixville.com/~moazam/stories/2004/05/17/maxpermsizeAndHowItRelatesToTheOverallHeap.html

You may also try to enable logging in the app or check the logs to see
if it is an OutOfMemory exception (heap) or a PermGen error.

There are also JVM flags such as -Xss and -XX:ThreadStackSize you can
play with too.

good luck.
 -gnul

On Sun, May 3, 2009 at 8:15 PM, Adam Carter <Adam.Carter@optus.com.au> wrote:
> A cisco web java gui is complaing "Your current java memory heap size is less than 256 MB. You must increate the Java memory heap size" etc. On windows and on a previous gentoo x86 box putting -Xmx256m in the java applet runtime settings makes it work. This box is a newly build amd64.
>
> Looks like the .jnlp is setting the memory;
>
> sphinx deployment # grep max /tmp/idm-1.jnlp
>    <j2se version="1.4+" initial-heap-size="64m" max-heap-size="256m"/>
>
> And the app is running with the required Xmx256m parameter;
>
> sphinx deployment # pgrep -lf java
> 10147 /opt/sun-jdk-1.6.0.13/jre/bin/java -Xmx256m -Xbootclasspath/a:/opt/sun-jdk-1.6.0.13/jre/lib/javaws.jar:/opt/sun-jdk-1.6.0.13/jre/lib/deploy.jar:/opt/sun-jdk-1.6.0.13/jre/lib/plugin.jar -classpath /opt/sun-jdk-1.6.0.13/jre/lib/deploy.jar -Djnlpx.vmargs=-Xmx256m -Djnlpx.jvm=/opt/sun-jdk-1.6.0.13/jre/bin/java -Djnlpx.splashport=36054 -Djnlpx.home=/opt/sun-jdk-1.6.0.13/jre/bin -Djnlpx.remove=false -Djnlpx.offline=false -Djnlpx.relaunch=true -Djnlpx.heapsize=67108864,268435456 -Djava.security.policy=file:/opt/sun-jdk-1.6.0.13/jre/lib/security/javaws.policy -DtrustProxy=true -Xverify:remote com.sun.javaws.Main file:///tmp/idm-9.jnlp
>
> So it looks like it should work - any ideas on how to fix this? (sun-jdk-1.6.0.13, also tried a 1.5 but had the same problem).
>
>
>

RE: [gentoo-java] Memory heap size problem

[Adam Carter]

> > A cisco web java gui is complaing "Your current java memory
> heap size
> > is less than 256 MB. You must increate the Java memory heap size"
> > etc. On windows and on a previous gentoo x86 box putting -Xmx256m in
> > the java applet runtime settings makes it work. This box is a newly
> > build amd64.
>
> Hi,
>
> I don't know this app, but I'd just try 512m instead of 256m... amd64
> tends to need more than x86 :) I'm not sure the app can test the
> parameter directly, they probably run out of heap and suggest
> this size which was known working on x86.

The max-heap-size="256m" seems to override -Xmx512m - when I run pgrep is still shows up as -Xmx256m. Is this expected?