[Building Sakai] lang.OutOfMemoryError: Java heap space

[Alan Berg]

I would also look at your monitoring as you should be able to spot when you
are reaching limits. I would suggest tuning on JMX on for example localhost
and start with jconsole which is included in the JDK. Once you are happy
with the memory spaces look towards a commercial monitoring tool.

JMX adds a couple more JAVA_OPTS:
https://confluence.sakaiproject.org/display/QA/Live+JVM+profiling



Regards,

Alan Berg


Regards,
           Alan


Alan Berg

Innovation working group
On the use of ICT in Education & Research
University of Amsterdam


On 14 August 2014 20:11, Noah Botimer <botimer at umich.edu> wrote:

> You might try something like:
>
> export JAVA_OPTS='-server -Xms6144m -Xmx6144m -XX:PermSize=128m
> -XX:MaxPermSize=768m
>
> If you are only running one JVM on the server, that will leave plenty for
> the system and other stuff.
>
> Also, consider running OpenJDK 7. The garbage collection is more
> self-tuning and tends to handle these larger heaps more gracefully over
> time.
>
> Thanks,
> -Noah
>
> On Aug 14, 2014, at 12:15 PM, Sam Ottenhoff wrote:
>
>
>>
>> We have Sakai 2.9.2 with Java 6. This is a CentOS virtual machine with 16
>> GB of RAM. Here is my JAVA_OPTS:
>>
>>
>>
>> export JAVA_OPTS='-server -Xms1024m -Xmx1024m -XX:PermSize=128m
>> -XX:MaxPermSize=512m
>>
>
>
> So you have 16GB of RAM but you're only allowing Sakai's Tomcat JVM to use
> 1GB!  Provide the JVM more memory!
>
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