Start the Logical Host.
Go to the Logical Host directory and double-click the start_domain1.bat file.
Open an internet browser and enter http://<host_name>:18000. The Integration Server Administration window will open.
Login to the Integration Server Administration application.
On the right side of the window, select the JVM Settings tab.
Select the JVM Options link.
Change the default Heap Size from —Xmx512m to —Xmx768m.
Save the new settings and restart the Logical Host.