[ZOOKEEPER-1670] zookeeper should set a default value for SERVER_JVMFLAGS and CLIENT_JVMFLAGS so that memory usage is controlled

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.4.5
• Fix Version/s: 3.5.0
• Assignee: Flavio Paiva Junqueira
• Reporter: Arpit Gupta
• Created: 15/Mar/13 21:36
• Updated: 18/Dec/19 13:34
• Resolved: 01/Oct/13 21:32

Description

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

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

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