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:
- In the administrative console, click , and then click on an application server name.
- In the Server Infrastructure section, click .
Directly updating the file, as this is the same file that gets updated while changing WAS console: On toolkit, this would be the path
Search for initialHeapSize and maximumHeapSize and change
or you have only 1024 try
If you give incorrect values here, it could result in your server not starting so please be cognizant about that.