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Status Delivered
Workspace CICS Transaction Server for z/OS
Categories Runtime
Created by Guest
Created on May 31, 2017

RELATED IDEAS

CICS OSCORE SMF record

State Street Corporation is interested in an additional statistic; that of the largest available low Dynamic Storage Area. We, and other CICS shops, are still running legacy CICS programs that consume a significant amount of DSA. This factor requires us to maximize the region size and Maximum DSA for each of our regions.
We have discussed the timing of these statistics and thought for our purposes that a midnight STAT would be sufficient, but it occurs to us that tracking this in a 15 minute interval would give a better picture.

Idea priority Medium
  • Guest
    Reply
    |     Jan 28, 2022

    This RFE is satisfied by changes made in CICS TS 5.6 to track MVS storage usage and report on short on storage conditions. There are additional statistics including SMSMVS24TOTALUNALLOC (The current total amount of unallocated user region storage) and SMSMVS24LARGESTUNALLOC (The size of the current largest contiguous storage area available in unallocated user region storage). For more information see https://www.ibm.com/docs/en/cics-ts/5.6?topic=statistics-storage-manager-global and https://www.ibm.com/docs/en/cics-ts/5.6?topic=sr-mvs-user-region-extended-user-region-storage-report

  • Guest
    Reply
    |     Jan 29, 2018

    This is candidate for a future release.

  • Guest
    Reply
    |     Jun 26, 2017

    Hi,

    I have looked at the calculations from the STAT and they are similar to what we are asking. The requested number should be the largest single contiguous DSA available during that covered interval (15 minutes). We hope to use this as a bellwether indicator for available DSA and to use a significant portion of this to add to the region and still track over time.

    Thanks,
    DBH

  • Guest
    Reply
    |     Jun 2, 2017

    Have you taken a look at the storage manager report than is produced by sample DFH0STAT, ie by running the STAT transaction and selecting a storage manager report ?

    For example for below the line storage it includes figures for:
    Private Area Region size below 16Mb
    Max User storage allocated below 16Mb (VIRT)
    Private Area storage available below 16Mb
    VIRT minus Current DSA Limit

    Likewise for 31 bit storage it includes figures for:
    Private Area Region size above 16Mb
    Max User storage allocated above 16Mb (EXT)
    Private Area storage available above 16Mb
    EXT minus Current EDSA Limit

    Is this the sort of thing you are requiring ?

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