How to increase application heap size in Eclipse?

Solution 1:

In the run configuration you want to customize (just click on it) open the tab Arguments and add -Xmx2048min the VM arguments section. You might want to set the -Xms as well (small heap size).

Solution 2:

1. Go to Eclipse Folder

2. Find Eclipse Icon in Eclipse Folder

3. Right Click on it you will get option "Show Package Content"

4. Contents folder will open on screen

5. If you are on Mac then you'll find "MacOS"

6. Open MacOS folder you'll find eclipse.ini file

7. Open it in word or any file editor for edit

   ...

    -XX:MaxPermSize=256m
   
    -Xms40m
   
    -Xmx512m
   

   ...

8. Replace -Xms512m to -Xmx1024m

9. Save the file and restart your Eclipse

10. Have a Nice time :)

Solution 3:

Find the Run button present on the top of the Eclipse, then select Run Configuration -> Arguments, in VM arguments section just mention the heap size you want to extend as below:

-Xmx1024m