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Status Submitted
Workspace z/OS
Categories z/OSMF
Created by Guest
Created on Jan 11, 2025

RELATED IDEAS

have z/OSMF exploit shared libraries - todayit is just enabled

The default for Java shared library support is to store the information in memory. This means the first time a Java program is started it loads the libraries, and saves the information in memory. The second time the Java program is started it can benefit from the shared libraries in memory. If z/OSMF is only started once per IPL, the shared library support adds nothing.

To exploit shared library support, you can harden the in-memory data. This is saved across IPL. After the system is IPLED, you can load the information back into memory. Now when z/OSMF is started it can benefit from the shared library information, and so start much faster. You should be able to save half the CPU. See https://colinpaice.blog/2023/08/26/turbo-start-your-java-program-on-z-os-and-save-a-bucket-of-cpu/


It would be good if IBM could ship the saved shared library information, so customers get "optimised" shared code from day 1 -this may not be possible.


The same technique could be used for ZOWE as well.

Idea priority High

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