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Platform resource requirements

N4 requires more disk space, more Java heap, and more system RAM to run than a similar AX station. Therefore, AX-3.8 JACE running near capacity will probably not fit the same station when converted to N4. A brief summary of reasons why are as follows.
  • Disk space (Flash)

    N4 requires between 14-16 MB more space than an equivalent AX installation. Additional space is required by the new Java 8 VM (vs. Java 5), and new UX features enabling a rich browser experience.

  • Heap space

    For an equivalent station, N4 requires more Java heap (a baseline of 10MB) due to new features and functionality, and more system memory when running on JACE controller.

  • History RAM disk size (NPM6/NPM6E only)

    To free additional system memory, the maximum history RAM disk size on JACE-6 has been reduced from 64MB to 32MB. This should not affect most units because the default RAM disk size is 32MB. If the RAM disk on JACE-6 has been increased, then this increase in the RAM disk size comes at the expense of Java heap. Maximum history count has not changed.

Related Links

  • Platform compatibility (Parent Topic)

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