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Re: Increase HeapSize on registry.access.redhat.com/jboss-webserver-3/webserver30-tomcat8-openshift:1.2-12



Thanks for your response Per.

I can confirm it's dynamically. We increased our resources and the heapsize increased for our tomcat.

When we want to increase the heap_size with the size of our environment variable. Where do I have to set this?
Inside the tomcat container or on our openshift-master or... ?

Thanks!


Van: Per Carlson <pelle hemmop com>
Verzonden: maandag 28 november 2016 14:25:25
Aan: Den Cowboy
CC: users lists openshift redhat com
Onderwerp: Re: Increase HeapSize on registry.access.redhat.com/jboss-webserver-3/webserver30-tomcat8-openshift:1.2-12
 
Hi Den.

The heap allocation is done dynamically. When the image starts it runs /opt/webserver/bin/launch.sh. In this file you will find

    MAX_HEAP=`get_heap_size`
    if [ -n "$MAX_HEAP" ]; then
      CATALINA_OPTS="$CATALINA_OPTS -Xms${MAX_HEAP}m -Xmx${MAX_HEAP}m"
    fi

The function "get_heap_size" is sourced from /usr/local/dynamic-resources/dynamic_resources.sh. What I *think* it does is checking if any resource quotas are set, and if so allocates 50% of the available memory as heap. The percentage can be changed by setting the environment variable CONTAINER_HEAP_PERCENT to e.g 0.10 (to get 10%).


On 28 November 2016 at 13:02, Den Cowboy <dencowboy hotmail com> wrote:

Hi, we're using the tomcat of this image:

registry.access.redhat.com/jboss-webserver-3/webserver30-tomcat8-openshift:1.2-12
The problem is were not able to increase the heapsize. It's different on our servers than on our local machines.
What's the best way to set this parameter? (e.g. in the dockerfile)


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Pelle

Research is what I'm doing when I don't know what I'm doing.
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