The service for iWay Service Manager (iSM) that runs on either Windows or Linux instantiates a Java Virtual Machine (JVM) upon startup. Left alone, this JVM will try to acquire memory based on free physical memory reported by the platform. At times, this can represent an unnecessarily large amount of memory.

Controlling the amount of memory or Heap used by the iSM service carries several advantages:

• Allowing multiple iSM services to run without using all available system memory.
• Memory size may impact performance.
• Avoiding Out of Memory errors and exceptions.