Increase HeapSize on server.xml for OutOfMemory Exception

If you are running SOLR or any other high memory process, there is a chance, you have seen the OutOfMemory exception. You can increase the heap-size using WAS or directly in the file. Recommended approach would be directly in the file. 

From WAS console:

1. In the administrative console, click Servers > Server Types > WebSphere application servers, and then click on an application server name.
2. In the Server Infrastructure section, click Java and process management > Process definition .

Directly updating the file, as this is the same file that gets updated while changing WAS console: On toolkit, this would be the path

C:\WCDE_ENT70\wasprofile\config\cells\localhost\nodes\localhost\servers\server1\server.xml

Search for initialHeapSize and maximumHeapSize and change 

initialHeapSize=512

maximumHeapSize=1536

or you have only 1024 try

initialHeapSize=1024

maximumHeapSize=1024

If you give incorrect values here, it could result in your server not starting so please be cognizant about that.