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PH64859: MQI APPLICATION PERFORMANCE DEGRADATION FOLLOWING APPLICATION OF APAR PH60591 25/01/16 PTF PECHANGE

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APAR status

  • Closed as program error.

Error description

  • Performance degradation in MQI application calls may be
observed following application of APAR PH60591.

Local fix

  • 



Problem summary


    

  • ****************************************************************
* USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
*                 Release 2 Modification 0,                    *
*                 Release 3 Modification 0 and                 *
*                 Release 4 Modification 0.                    *
****************************************************************
* PROBLEM DESCRIPTION: Performance degradation following       *
*                      application of APAR PH60591.            *
****************************************************************
The changes in APAR PH60591 introduced additional costs which
in some cases could lead to a potential degradation in
performance being observed, depending on workload and the
system environment.

    



Problem conclusion


    

  • The changes in PH60591 have been reworked to mitigate the
observed performance degradation.

    



Temporary fix


    

  • 



Comments


    

  • ×**** PE25/03/26 FIX IN ERROR. SEE APAR PH65849  FOR DESCRIPTION
×**** PE25/03/26 FIX IN ERROR. SEE APAR PH65849  FOR DESCRIPTION

    



APAR Information




    

  • APAR number
    PH64859
    • 

  • Reported component name
    IBM MQ Z/OS V9
    • 

  • Reported component ID
    5655MQ900
    • 

  • Reported release
    200
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    YesPE
    • 

  • HIPER
    YesHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2025-01-16
    • 

  • Closed date
    2025-02-06
    • 

  • Last modified date
    2025-04-29
    • 





    

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

    • 

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

    
UI99891 UI99892 UI99893
    

    • 



Modules/Macros


    

  • CSQ3CL0X CSQ3RS0X CSQ3UR00 CSQAPRHX CSQARIB

    



Fix information


    

  • Fixed component name
    IBM MQ Z/OS V9
    • 

  • Fixed component ID
    5655MQ900
    • 



Applicable component levels


    

  • R200  PSY  UI99893
       UP25/02/18  P  F502  ­
    • 

  • R300  PSY  UI99892
       UP25/02/18  P  F502  ­
    • 

  • R400  PSY  UI99891
       UP25/02/18  P  F502  ­
    • 



Fix is available


    

  • Select the PTF appropriate for your component level.
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              [{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"200","Line of Business":{"code":"LOB77","label":"Automation Platform"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            29 April 2025
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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