[jira] [Created] (ZOOKEEPER-1670) zookeeper should set a default value for SERVER_JVMFLAGS so that memory usage is controlled

["Arpit Gupta (JIRA)" <ji...@apache.org>]

Arpit Gupta created ZOOKEEPER-1670:
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             Summary: zookeeper should set a default value for SERVER_JVMFLAGS so that memory usage is controlled
                 Key: ZOOKEEPER-1670
                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1670
             Project: ZooKeeper
          Issue Type: Bug
    Affects Versions: 3.4.5
            Reporter: Arpit Gupta
            Assignee: Arpit Gupta
             Fix For: 3.4.6


We noticed this jdk 1.6 where if no heap size is set the process takes up to 1/4 of mem available in the machine.

More info http://stackoverflow.com/questions/3428251/is-there-a-default-xmx-setting-for-java-1-5

You can run the following command to see what are the defaults for your machine

{code}
java -XX:+PrintFlagsFinal -version 2>&1 | grep -i -E 'heapsize|permsize|version'
{code}

And we noticed on two different class of machines that this was 1/4th of total memory on the machine.

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