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Status Not under consideration
Workspace CICS Transaction Server for z/OS
Categories Runtime
Created by Guest
Created on Aug 10, 2012

RELATED IDEAS

Performance Class Monitoring Program Storage HWM fields can be non-sensically high when a program is repeatedly loaded

Performance Class Monitoring Program Storage HWM fields like PC31SHWM are sometimes non-sensically high, approaching 2 gig. This happens when a task EXEC CICS LOADs a program repeatedly without ever doing an EXEC CICS RELEASE. Even though the program is only loaded into storage once, the PC31SHWM field is incremented by the length of the program each time the EXEC CICS LOAD is done. So when PC31SHWM is really high, you don't know if it was because of this quirk, or if it was because the task really did cause lots of programs to be loaded into CICS.
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The CICS Information Center talks about this quirk. Here is a link to this section:
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https://publib.boulder.ibm.com/infocenter/cicsts/v4r1/topic/com.ibm.cics.ts.performance.doc/topics/dfht3_mon_progstg.html
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There needs to be a way for these monitoring fields to only include program storage a task has caused to be loaded into CICS

Idea priority Medium
  • Guest
    Reply
    |     Oct 5, 2015

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - Servers and Systems Software
    Product family - Transaction Processing
    Product - CICS Transaction Server

    For recording keeping, the previous attributes were:
    Brand - WebSphere
    Product family - Transaction Processing
    Product - CICS Transaction Server

  • Guest
    Reply
    |     Jul 19, 2013

    This requirement has been re-evaluated. Looking at current plans, it is not likely that this would be implemented in the next two CICS TS releases, so correspondingly this requirement is being rejected. You have an opportunity to resubmit in eighteen months time if you wish it to be considered then.

    We recommend using the Storage Manager statistics for the loader's program storage domain subpools as the only completely accurate view of program storage usage (which ever DSA it's in) and along with loader's statistics to determine which programs are currently loaded in storage. Just using the monitoring data is a 'single' transaction view which doesn't give an 'ideal' complete view of what's needed. For example if two transactions use the same program, there would be two high-water-marks whereas in actual fact there may only be one copy of the program in storage, Loader and Storage manager knew that by the monitoring data would be misleading in this case.

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