increasing heap size of glassfish

In order to increase heap size for glassfish, follow th steps:

1) Open glassfish admin console from adress similar to http://localhost:4848/ 

(the default username: admin and password: adminadmin)

2) Select application server -> jvm settings -> jvm options

3) Update the parameters similar to the below ones according to your needs:

-XX:MaxPermSize=512m

-Xmx2048m

more on http://joshitech.blogspot.com/2009/09/glassfish-application-server.html