Exception in thread "main" java.lang.OutOfMemoryError while applying weblogic psu patch (bsu.sh)

When applying weblogic patch using smart update (bsu.sh),  through command line i received an error

Exception in thread "main" java.lang.OutOfMemoryError: GC overhead limit exceeded       
 at java.lang.reflect.Method.copy(Method.java:151)        
 at java.lang.reflect.ReflectAccess.copyMethod(ReflectAccess.java:136)        
 at sun.reflect.ReflectionFactory.copyMethod(ReflectionFactory.java:300)         
at java.lang.Class.searchMethods(Class.java:2799)         
at java.lang.Class.getMethod0(Class.java:2813)         
at java.lang.Class.getMethod(Class.java:1663)      



Now, open bsu.sh alter the values of Xms and Xmx (from default 256 to 1024) and rerun.