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IV26581: REDUCE EARLY WORKING STORAGE PAGING APPLIES TO AIX 7100-00

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APAR status

  • Closed as program error.

Error description

  • 



Local fix


    

  • 



Problem summary


    

  • ****************************************************************
* USERS AFFECTED:
* Users of the AIX 7100-00 Technology Level with the vmo
* tunable "numperm_global = 1" set.
****************************************************************
* PROBLEM DESCRIPTION:
* Paging of computational storage pages is occurring when a
* high percentage of memory is being used for the file cache.
****************************************************************
* RECOMMENDATION:
* Install APAR IV26581.
* Prior to APAR availability, interim fixes are available at:
* ftp://public.dhe.ibm.com/aix/ifixes/iv26581/
* IV26581s07 for 7100-00-07
****************************************************************

    



Problem conclusion


    

  • LRU processing changed to perform file only 4K page stealing
when 64K page size is at maxpin condition and there are 4K file
pages available to steal in the mempool.

    



Temporary fix


    

  • *********
* HIPER *
*********

    



Comments


    

  • 6100-06 - use AIX APAR IV27655
7100-00 - use AIX APAR IV26581

    



APAR Information




    

  • APAR number
    IV26581
    • 

  • Reported component name
    AIX V7.1
    • 

  • Reported component ID
    5765H4000
    • 

  • Reported release
    710
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    YesHIPER
    • 

  • Submitted date
    2012-08-20
    • 

  • Closed date
    2012-08-20
    • 

  • Last modified date
    2013-04-09
    • 





    

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

    
IV26272
    

    • 

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

    • 



Fix information


    

  • Fixed component name
    AIX V7.1
    • 

  • Fixed component ID
    5765H4000
    • 



Applicable component levels


    

  • R710  PSY  U851756
       UP12/12/07  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

              [{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SSMV87","label":"AIX 6.1 Enterprise Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSMVAX","label":"AIX Express Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG11R","label":"AIX 7.1 HIPERS, APARs and Fixes"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"","label":""}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            09 April 2013
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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