Open Windows Command Prompt, change to: C:\Program Files\Deepnet DualShield\tomcat\bin folder, then execute one of the following command depending on the version:

tomcat6w.exe //ES//dualshield

  

tomcat8w.exe //ES//dualshield

You will see a dialog style application "DualShield Authentication Server Properties"

  

Change the "Initial memory pool", "Maximum memory pool" and "MaxPermSize" according to the table below:

 

 

32-Bit

64-Bit

Total Physical RAM 4GB8GB
    
Maximum memory pool

JvmMx (MB)

1536

3072

Initial memory pool

JvmMs (MB)

1536

3072

Maximum permanent heap

(obsoleted in Java 8)

MaxPermSize (MB)

512

1024

    
Total RAM for JVM 2GB4GB

If your machine does not meet the minimum requirements, then configure the JVM memory settings proportionally using this table as a template.