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VM66881: Z/VM 7.4 PERFKIT: FIX PACK - FEATURE 01 FIX 01

A fix is available

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APAR status

  • Closed as program error.

Error description

  • z/VM Performance Data Pump has been changed to better recover
    from connectivity problems and short outages without loss of
    performance data.
    
    When the TCP/IP connection to the time series database is lost,
    reconnect is retried at reasonable intervals. In some network
    configurations persistent TCP/IP connection may be broken
    frequently. For short outages data will be buffered and sent
    once the service is available again, also allowing for a service
    restart without data loss. During longer outages, the oldest
    data is discarded once a set threshold is reached. Additional
    diagnostic function has been added to help z/VM Development
    diagnose issues in client configurations.
    
    The MDXSETUP logic was improved to address various situations
    observed in client configurations.
    
    
    Minor metrics changes have been made, among others to classify
    virtual machines better by operating system type. The z/VM
    Overview sample dashboard will distinguish between users running
    CMS and z/CMS. A duplicate field in the systcup measurement to
    avoid problems when feeding the data into Splunk.
    
    PERFKIT has been changed to correct a programming error that in
    some situations caused the following message:
    FCXBAS199A Divide exception at FCXPRC+35FC
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of Perfkit and Datapump.           *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    ****************************************************************
    * RECOMMENDATION: APPLY PTF                                    *
    ****************************************************************
    When z/VM Performance Datapump experiences connectivity and
    outagesperformance data may be lost. In addition there may be
    some issuesduring installation in certain configurations. Also,
    Performance Toolkit may experience a divide exception error.
    

Problem conclusion

  • When z/VM Performance Datapump experiences connectivity and
    outages performance data may be lost. In addition there may be
    some issues during installation in certain configurations. Also,
    Performance Toolkit may experience a divide exception error.
    z/VM Performance Data Pump has been changed to better recover
    from connectivity problems and short outages without loss of
    performan When the TCP/IP connection to the time series database
    is lost, reconnect is retried at reasonable intervals. In some
    network config The MDXSETUP logic was improved to address
    various situations observed in client configurations. Minor
    metrics changes have been made, among others to classify virtual
    machines better by operating system type. The z/VM Overview s
    PERFKIT has been changed to correct a programming error that in
    some situations caused the following message: FCXBAS199A Divide
    exception at FCXPRC+35FC
    

Temporary fix

Comments

APAR Information

  • APAR number

    VM66881

  • Reported component name

    PERF TOOLKIT

  • Reported component ID

    568411218

  • Reported release

    740

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    YesSpecatt / New Function / Xsystem

  • Submitted date

    2025-09-04

  • Closed date

    2026-01-07

  • Last modified date

    2026-01-15

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

    UM90581

Modules/Macros

  • FCXPRC   MDXDICT  MDXSETUP MDXUTILX 7VMPTK40
    

Fix information

  • Fixed component name

    PERF TOOLKIT

  • Fixed component ID

    568411218

Applicable component levels

  • R740 PSY UM90581

       UP26/01/15 I 1000  

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

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Document Information

Modified date:
16 January 2026