[SOLVED] How to Lower Heap Size of WebSphere Server


I tried to change the Heap Size of my local WebSphere Server instance to 2G using the “Run Administrative Console” function in RAD but apparently, that was too big of a number. Now, I can’t start the server anymore and I get this error:

JVMJ9VM015W Initialization error for library j9gc23(2): Failed to instantiate heap.  2G requested
Could not create the Java virtual machine.

I can’t just change it back to a lower number because I can’t seem to use the “Run Admin Console” function without starting the server first so I was wondering if anyone knew where the config file is kept for this? How can fix this problem?


Work with the server.xml under the config/cells/cellName/nodes/nodename/servers/servername/ directory.

cellName and nodename would likley be based on your host name. I have kept them as cellName (and nodename) here in the structure above.

The servername would be the default server1

Look towards the bottom of the file

It would have something like this: (Change the initialHeapSize and maximumHeapSize)

Save the file and start your server and you should be able wot work with the server.



Answered By – Manglu

Answer Checked By – Terry (BugsFixing Volunteer)

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