wildfly memory jvm setting

 from here :

wildfly-increase-heap

In the WildFly installation home directory, we can find the standalone.conf (for Unix based systems) or standalone.conf.bat (for Windows systems) file in the bin folder.

We can simply open it and update the -Xmx option in the following line (change the number as per the requirement):

    JAVA_OPTS="-Xms64m -Xmx512m ..."

This will set the heap memory while starting up the server.