G1 Eden Space and G1 Survivor Space

Can anyone please help me understand the impact of G1 Eden Space and G1 Survivor Space using 100% of memory ? How can I modify the memory usage in setenv.sh to bring down the usage of these two ? 

1 answer

This widget could not be displayed.

The impact of a full heap utilization are related to worse performance of your Java Virtual Machine and also low application performance. You have to consider that an Heap out of Memory Exception can also occurs.

In order to manage your heap available space you need to specify these command line options whenever you run java:

  • -Xms:<size>, which sets the initial and minimum heap size
  • -Xmx:<size>, which sets the maximum heap size

For example:


java -Xms:1g -Xmx:1g


In your setenv.sh you can search a variable like this and place your parameters

JAVA_OPTS="-Xms2048m -Xmx3072m -XX:MaxPermSize=3072m


You will find further details on Memory management in JAVA, and other command lines option at this link:



Suggest an answer

Log in or Sign up to answer
Atlassian Summit 2018

Meet the community IRL

Atlassian Summit is an excellent opportunity for in-person support, training, and networking.

Learn more
Community showcase
Posted yesterday in New to Jira

Are you planning to trial, or are currently trialling Jira Software? - We want to talk to you!

Hello! I'm Rayen, a product manager at Atlassian. My team and I are working hard to improve the trial experience for Jira Software Cloud. We are interested in   talking to 20 people planning t...

82 views 1 0
Join discussion

Atlassian User Groups

Connect with like-minded Atlassian users at free events near you!

Find a group

Connect with like-minded Atlassian users at free events near you!

Find my local user group

Unfortunately there are no AUG chapters near you at the moment.

Start an AUG

You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs

Groups near you